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no real difference now
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Don't do a single array; attach them to fsparam_enum() entry
instead. And don't bother trying to embed the names into those -
it actually loses memory, with no real speedup worth mentioning.
Simplifies validation as well.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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As it is, vfs_parse_fs_string() makes "foo" and "foo=" indistinguishable;
both get fs_value_is_string for ->type and NULL for ->string. To make
it even more unpleasant, that combination is impossible to produce with
fsconfig().
Much saner rules would be
"foo" => fs_value_is_flag, NULL
"foo=" => fs_value_is_string, ""
"foo=bar" => fs_value_is_string, "bar"
All cases are distinguishable, all results are expressable by fsconfig(),
->has_value checks are much simpler that way (to the point of the field
being useless) and quite a few regressions go away (gfs2 has no business
accepting -o nodebug=, for example).
Partially based upon patches from Miklos.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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git://people.freedesktop.org/~agd5f/linux into drm-next
amd-drm-next-5.6-2020-02-05:
amdgpu:
- EDC fixes for Arcturus
- GDDR6 memory training fixe
- Fix for reading gfx clockgating registers while in GFXOFF state
- i2c freq fixes
- Misc display fixes
- TLB invalidation fix when using semaphores
- VCN 2.5 instancing fixes
- Switch raven1 gfxoff to a blacklist
- Coreboot workaround for KV/KB
- Root cause dongle fixes for display and revert workaround
- Enable GPU reset for renoir and navi
- Navi overclocking fixes
- Fix up confusing warnings in display clock validation on raven
amdkfd:
- SDMA fix
radeon:
- Misc LUT fixes
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200206035458.3894-1-alexander.deucher@amd.com
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Deprecate the generic TLS cap bit, use the new TX-specific
TLS cap bit instead.
Fixes: a12ff35e0fb7 ("net/mlx5: Introduce TLS TX offload hardware bits and structures")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Pull more KVM updates from Paolo Bonzini:
"s390:
- fix register corruption
- ENOTSUPP/EOPNOTSUPP mixed
- reset cleanups/fixes
- selftests
x86:
- Bug fixes and cleanups
- AMD support for APIC virtualization even in combination with
in-kernel PIT or IOAPIC.
MIPS:
- Compilation fix.
Generic:
- Fix refcount overflow for zero page"
* tag 'kvm-5.6-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (42 commits)
KVM: vmx: delete meaningless vmx_decache_cr0_guest_bits() declaration
KVM: x86: Mark CR4.UMIP as reserved based on associated CPUID bit
x86: vmxfeatures: rename features for consistency with KVM and manual
KVM: SVM: relax conditions for allowing MSR_IA32_SPEC_CTRL accesses
KVM: x86: Fix perfctr WRMSR for running counters
x86/kvm/hyper-v: don't allow to turn on unsupported VMX controls for nested guests
x86/kvm/hyper-v: move VMX controls sanitization out of nested_enable_evmcs()
kvm: mmu: Separate generating and setting mmio ptes
kvm: mmu: Replace unsigned with unsigned int for PTE access
KVM: nVMX: Remove stale comment from nested_vmx_load_cr3()
KVM: MIPS: Fold comparecount_func() into comparecount_wakeup()
KVM: MIPS: Fix a build error due to referencing not-yet-defined function
x86/kvm: do not setup pv tlb flush when not paravirtualized
KVM: fix overflow of zero page refcount with ksm running
KVM: x86: Take a u64 when checking for a valid dr7 value
KVM: x86: use raw clock values consistently
KVM: x86: reorganize pvclock_gtod_data members
KVM: nVMX: delete meaningless nested_vmx_run() declaration
KVM: SVM: allow AVIC without split irqchip
kvm: ioapic: Lazy update IOAPIC EOI
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of pending small fixes:
ALSA core:
- PCM memory leak fix
ASoC:
- Lots of SOF and Intel driver fixes
- Addition of COMMON_CLK for wcd934x
- Regression fixes for AMD and Tegra platforms
HD-audio:
- DP-MST HDMI regression fix, Tegra workarounds, HP quirk fix
Others:
- A few fixes relevant with the recent uapi-updates
- Sparse warnings and endianness fixes"
* tag 'sound-fix-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (35 commits)
ALSA: hda: Clear RIRB status before reading WP
ALSA: hda/realtek - Fixed one of HP ALC671 platform Headset Mic supported
ASoC: wcd934x: Add missing COMMON_CLK dependency to SND_SOC_ALL_CODECS
ALSA: hda - Fix DP-MST support for NVIDIA codecs
ASoC: wcd934x: Add missing COMMON_CLK dependency
MAINTAINERS: Remove the Bard Liao from the MAINTAINERS of Realtek CODECs
ASoC: tegra: Revert 24 and 32 bit support
ASoC: SOF: Intel: add PCI ID for JasperLake
ALSA: hdsp: Make the firmware loading ioctl a bit more readable
ALSA: emu10k1: Fix annotation and cast for the recent uapi header change
ALSA: dummy: Fix PCM format loop in proc output
ALSA: usb-audio: Annotate endianess in Scarlett gen2 quirk
ALSA: usb-audio: Fix endianess in descriptor validation
ALSA: hda: Add JasperLake PCI ID and codec vid
ALSA: pcm: Fix sparse warnings wrt snd_pcm_state_t
ALSA: pcm: Fix memory leak at closing a stream without hw_free
ALSA: uapi: Fix sparse warning
ASoC: rt715: Add __maybe_unused to PM callbacks
ASoC: rt711: Add __maybe_unused to PM callbacks
ASoC: rt700: Add __maybe_unused to PM callbacks
...
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sk_buff.qlen can be accessed concurrently as noticed by KCSAN,
BUG: KCSAN: data-race in __skb_try_recv_from_queue / unix_dgram_sendmsg
read to 0xffff8a1b1d8a81c0 of 4 bytes by task 5371 on cpu 96:
unix_dgram_sendmsg+0x9a9/0xb70 include/linux/skbuff.h:1821
net/unix/af_unix.c:1761
____sys_sendmsg+0x33e/0x370
___sys_sendmsg+0xa6/0xf0
__sys_sendmsg+0x69/0xf0
__x64_sys_sendmsg+0x51/0x70
do_syscall_64+0x91/0xb47
entry_SYSCALL_64_after_hwframe+0x49/0xbe
write to 0xffff8a1b1d8a81c0 of 4 bytes by task 1 on cpu 99:
__skb_try_recv_from_queue+0x327/0x410 include/linux/skbuff.h:2029
__skb_try_recv_datagram+0xbe/0x220
unix_dgram_recvmsg+0xee/0x850
____sys_recvmsg+0x1fb/0x210
___sys_recvmsg+0xa2/0xf0
__sys_recvmsg+0x66/0xf0
__x64_sys_recvmsg+0x51/0x70
do_syscall_64+0x91/0xb47
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Since only the read is operating as lockless, it could introduce a logic
bug in unix_recvq_full() due to the load tearing. Fix it by adding
a lockless variant of skb_queue_len() and unix_recvq_full() where
READ_ONCE() is on the read while WRITE_ONCE() is on the write similar to
the commit d7d16a89350a ("net: add skb_queue_empty_lockless()").
Signed-off-by: Qian Cai <cai@lca.pw>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull ceph fixes from Ilya Dryomov:
- a set of patches that fixes various corner cases in mount and umount
code (Xiubo Li). This has to do with choosing an MDS, distinguishing
between laggy and down MDSes and parsing the server path.
- inode initialization fixes (Jeff Layton). The one included here
mostly concerns things like open_by_handle() and there is another one
that will come through Al.
- copy_file_range() now uses the new copy-from2 op (Luis Henriques).
The existing copy-from op turned out to be infeasible for generic
filesystem use; we disable the copy offload if OSDs don't support
copy-from2.
- a patch to link "rbd" and "block" devices together in sysfs (Hannes
Reinecke)
... and a smattering of cleanups from Xiubo, Jeff and Chengguang.
* tag 'ceph-for-5.6-rc1' of https://github.com/ceph/ceph-client: (25 commits)
rbd: set the 'device' link in sysfs
ceph: move net/ceph/ceph_fs.c to fs/ceph/util.c
ceph: print name of xattr in __ceph_{get,set}xattr() douts
ceph: print r_direct_hash in hex in __choose_mds() dout
ceph: use copy-from2 op in copy_file_range
ceph: close holes in structs ceph_mds_session and ceph_mds_request
rbd: work around -Wuninitialized warning
ceph: allocate the correct amount of extra bytes for the session features
ceph: rename get_session and switch to use ceph_get_mds_session
ceph: remove the extra slashes in the server path
ceph: add possible_max_rank and make the code more readable
ceph: print dentry offset in hex and fix xattr_version type
ceph: only touch the caps which have the subset mask requested
ceph: don't clear I_NEW until inode metadata is fully populated
ceph: retry the same mds later after the new session is opened
ceph: check availability of mds cluster on mount after wait timeout
ceph: keep the session state until it is released
ceph: add __send_request helper
ceph: ensure we have a new cap before continuing in fill_inode
ceph: drop unused ttl_from parameter from fill_inode
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
- Added new "bootconfig".
This looks for a file appended to initrd to add boot config options,
and has been discussed thoroughly at Linux Plumbers.
Very useful for adding kprobes at bootup.
Only enabled if "bootconfig" is on the real kernel command line.
- Created dynamic event creation.
Merges common code between creating synthetic events and kprobe
events.
- Rename perf "ring_buffer" structure to "perf_buffer"
- Rename ftrace "ring_buffer" structure to "trace_buffer"
Had to rename existing "trace_buffer" to "array_buffer"
- Allow trace_printk() to work withing (some) tracing code.
- Sort of tracing configs to be a little better organized
- Fixed bug where ftrace_graph hash was not being protected properly
- Various other small fixes and clean ups
* tag 'trace-v5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (88 commits)
bootconfig: Show the number of nodes on boot message
tools/bootconfig: Show the number of bootconfig nodes
bootconfig: Add more parse error messages
bootconfig: Use bootconfig instead of boot config
ftrace: Protect ftrace_graph_hash with ftrace_sync
ftrace: Add comment to why rcu_dereference_sched() is open coded
tracing: Annotate ftrace_graph_notrace_hash pointer with __rcu
tracing: Annotate ftrace_graph_hash pointer with __rcu
bootconfig: Only load bootconfig if "bootconfig" is on the kernel cmdline
tracing: Use seq_buf for building dynevent_cmd string
tracing: Remove useless code in dynevent_arg_pair_add()
tracing: Remove check_arg() callbacks from dynevent args
tracing: Consolidate some synth_event_trace code
tracing: Fix now invalid var_ref_vals assumption in trace action
tracing: Change trace_boot to use synth_event interface
tracing: Move tracing selftests to bottom of menu
tracing: Move mmio tracer config up with the other tracers
tracing: Move tracing test module configs together
tracing: Move all function tracing configs together
tracing: Documentation for in-kernel synthetic event API
...
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Pull io_uring updates from Jens Axboe:
"Some later fixes for io_uring:
- Small cleanup series from Pavel
- Belt and suspenders build time check of sqe size and layout
(Stefan)
- Addition of ->show_fdinfo() on request of Jann Horn, to aid in
understanding mapped personalities
- eventfd recursion/deadlock fix, for both io_uring and aio
- Fixup for send/recv handling
- Fixup for double deferral of read/write request
- Fix for potential double completion event for close request
- Adjust fadvise advice async/inline behavior
- Fix for shutdown hang with SQPOLL thread
- Fix for potential use-after-free of fixed file table"
* tag 'io_uring-5.6-2020-02-05' of git://git.kernel.dk/linux-block:
io_uring: cleanup fixed file data table references
io_uring: spin for sq thread to idle on shutdown
aio: prevent potential eventfd recursion on poll
io_uring: put the flag changing code in the same spot
io_uring: iterate req cache backwards
io_uring: punt even fadvise() WILLNEED to async context
io_uring: fix sporadic double CQE entry for close
io_uring: remove extra ->file check
io_uring: don't map read/write iovec potentially twice
io_uring: use the proper helpers for io_send/recv
io_uring: prevent potential eventfd recursion on poll
eventfd: track eventfd_signal() recursion depth
io_uring: add BUILD_BUG_ON() to assert the layout of struct io_uring_sqe
io_uring: add ->show_fdinfo() for the io_uring file descriptor
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Pull libata updates from Jens Axboe:
- Add a Sandisk CF card to supported pata_pcmcia list (Christian)
- Move pata_arasan_cf away from legacy API (Peter)
- Ensure ahci DMA/ints are shut down on shutdown (Prabhakar)
* tag 'libata-5.6-2020-02-05' of git://git.kernel.dk/linux-block:
ata: pata_arasan_cf: Use dma_request_chan() instead dma_request_slave_channel()
ata: ahci: Add shutdown to freeze hardware resources of ahci
pata_pcmia: add SanDisk High (>8G) CF card to supported list
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Depending on include order:
include/linux/of_clk.h:11:45: warning: ‘struct device_node’ declared inside parameter list will not be visible outside of this definition or declaration
unsigned int of_clk_get_parent_count(struct device_node *np);
^~~~~~~~~~~
include/linux/of_clk.h:12:43: warning: ‘struct device_node’ declared inside parameter list will not be visible outside of this definition or declaration
const char *of_clk_get_parent_name(struct device_node *np, int index);
^~~~~~~~~~~
include/linux/of_clk.h:13:31: warning: ‘struct of_device_id’ declared inside parameter list will not be visible outside of this definition or declaration
void of_clk_init(const struct of_device_id *matches);
^~~~~~~~~~~~
Fix this by adding forward declarations for struct device_node and
struct of_device_id.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lkml.kernel.org/r/20200205194649.31309-1-geert+renesas@glider.be
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"Mostly cleanups and minor improvements with some new chip support for
some drivers"
* tag 'pwm/for-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (37 commits)
pwm: Remove set but not set variable 'pwm'
pwm: sun4i: Initialize variables before use
pwm: stm32: Remove automatic output enable
pwm: sun4i: Narrow scope of local variable
pwm: bcm2835: Allow building for ARCH_BRCMSTB
pwm: imx27: Eliminate error message for defer probe
pwm: sun4i: Fix inconsistent IS_ERR and PTR_ERR
pwm: sun4i: Move pwm_calculate() out of spin_lock()
pwm: omap-dmtimer: Allow compiling with COMPILE_TEST
pwm: omap-dmtimer: put_device() after of_find_device_by_node()
pwm: omap-dmtimer: Simplify error handling
pwm: omap-dmtimer: Remove PWM chip in .remove before making it unfunctional
pwm: Implement tracing for .get_state() and .apply_state()
pwm: rcar: Document inability to set duty_cycle = 0
pwm: rcar: Drop useless call to pwm_get_state()
pwm: Fix minor Kconfig whitespace issues
pwm: atmel: Implement .get_state()
pwm: atmel: Use register accessors for channels
pwm: atmel: Document known weaknesses of both hardware and software
pwm: atmel: Replace loop in prescale calculation by ad-hoc calculation
...
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git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu updates from Joerg Roedel:
- Allow compiling the ARM-SMMU drivers as modules.
- Fixes and cleanups for the ARM-SMMU drivers and io-pgtable code
collected by Will Deacon. The merge-commit (6855d1ba7537) has all the
details.
- Cleanup of the iommu_put_resv_regions() call-backs in various
drivers.
- AMD IOMMU driver cleanups.
- Update for the x2APIC support in the AMD IOMMU driver.
- Preparation patches for Intel VT-d nested mode support.
- RMRR and identity domain handling fixes for the Intel VT-d driver.
- More small fixes and cleanups.
* tag 'iommu-updates-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (87 commits)
iommu/amd: Remove the unnecessary assignment
iommu/vt-d: Remove unnecessary WARN_ON_ONCE()
iommu/vt-d: Unnecessary to handle default identity domain
iommu/vt-d: Allow devices with RMRRs to use identity domain
iommu/vt-d: Add RMRR base and end addresses sanity check
iommu/vt-d: Mark firmware tainted if RMRR fails sanity check
iommu/amd: Remove unused struct member
iommu/amd: Replace two consecutive readl calls with one readq
iommu/vt-d: Don't reject Host Bridge due to scope mismatch
PCI/ATS: Add PASID stubs
iommu/arm-smmu-v3: Return -EBUSY when trying to re-add a device
iommu/arm-smmu-v3: Improve add_device() error handling
iommu/arm-smmu-v3: Use WRITE_ONCE() when changing validity of an STE
iommu/arm-smmu-v3: Add second level of context descriptor table
iommu/arm-smmu-v3: Prepare for handling arm_smmu_write_ctx_desc() failure
iommu/arm-smmu-v3: Propagate ssid_bits
iommu/arm-smmu-v3: Add support for Substream IDs
iommu/arm-smmu-v3: Add context descriptor tables allocators
iommu/arm-smmu-v3: Prepare arm_smmu_s1_cfg for SSID support
ACPI/IORT: Parse SSID property of named component node
...
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from Juergen Gross:
- fix a bug introduced in 5.5 in the Xen gntdev driver
- fix the Xen balloon driver when running on ancient Xen versions
- allow Xen stubdoms to control interrupt enable flags of
passed-through PCI cards
- release resources in Xen backends under memory pressure
* tag 'for-linus-5.6-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/blkback: Consistently insert one empty line between functions
xen/blkback: Remove unnecessary static variable name prefixes
xen/blkback: Squeeze page pools if a memory pressure is detected
xenbus/backend: Protect xenbus callback with lock
xenbus/backend: Add memory pressure handler callback
xen/gntdev: Do not use mm notifiers with autotranslating guests
xen/balloon: Support xend-based toolstack take two
xen-pciback: optionally allow interrupt enable flag writes
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git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD
KVM: s390: Fixes and cleanups for 5.6
- fix register corruption
- ENOTSUPP/EOPNOTSUPP mixed
- reset cleanups/fixes
- selftests
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syzbot managed to send an IPX packet through bond_alb_xmit()
and af_packet and triggered a use-after-free.
First, bond_alb_xmit() was using ipx_hdr() helper to reach
the IPX header, but ipx_hdr() was using the transport offset
instead of the network offset. In the particular syzbot
report transport offset was 0xFFFF
This patch removes ipx_hdr() since it was only (mis)used from bonding.
Then we need to make sure IPv4/IPv6/IPX headers are pulled
in skb->head before dereferencing anything.
BUG: KASAN: use-after-free in bond_alb_xmit+0x153a/0x1590 drivers/net/bonding/bond_alb.c:1452
Read of size 2 at addr ffff8801ce56dfff by task syz-executor.2/18108
(if (ipx_hdr(skb)->ipx_checksum != IPX_NO_CHECKSUM) ...)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
[<ffffffff8441fc42>] __dump_stack lib/dump_stack.c:17 [inline]
[<ffffffff8441fc42>] dump_stack+0x14d/0x20b lib/dump_stack.c:53
[<ffffffff81a7dec4>] print_address_description+0x6f/0x20b mm/kasan/report.c:282
[<ffffffff81a7e0ec>] kasan_report_error mm/kasan/report.c:380 [inline]
[<ffffffff81a7e0ec>] kasan_report mm/kasan/report.c:438 [inline]
[<ffffffff81a7e0ec>] kasan_report.cold+0x8c/0x2a0 mm/kasan/report.c:422
[<ffffffff81a7dc4f>] __asan_report_load_n_noabort+0xf/0x20 mm/kasan/report.c:469
[<ffffffff82c8c00a>] bond_alb_xmit+0x153a/0x1590 drivers/net/bonding/bond_alb.c:1452
[<ffffffff82c60c74>] __bond_start_xmit drivers/net/bonding/bond_main.c:4199 [inline]
[<ffffffff82c60c74>] bond_start_xmit+0x4f4/0x1570 drivers/net/bonding/bond_main.c:4224
[<ffffffff83baa558>] __netdev_start_xmit include/linux/netdevice.h:4525 [inline]
[<ffffffff83baa558>] netdev_start_xmit include/linux/netdevice.h:4539 [inline]
[<ffffffff83baa558>] xmit_one net/core/dev.c:3611 [inline]
[<ffffffff83baa558>] dev_hard_start_xmit+0x168/0x910 net/core/dev.c:3627
[<ffffffff83bacf35>] __dev_queue_xmit+0x1f55/0x33b0 net/core/dev.c:4238
[<ffffffff83bae3a8>] dev_queue_xmit+0x18/0x20 net/core/dev.c:4278
[<ffffffff84339189>] packet_snd net/packet/af_packet.c:3226 [inline]
[<ffffffff84339189>] packet_sendmsg+0x4919/0x70b0 net/packet/af_packet.c:3252
[<ffffffff83b1ac0c>] sock_sendmsg_nosec net/socket.c:673 [inline]
[<ffffffff83b1ac0c>] sock_sendmsg+0x12c/0x160 net/socket.c:684
[<ffffffff83b1f5a2>] __sys_sendto+0x262/0x380 net/socket.c:1996
[<ffffffff83b1f700>] SYSC_sendto net/socket.c:2008 [inline]
[<ffffffff83b1f700>] SyS_sendto+0x40/0x60 net/socket.c:2004
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Replace with appropriate types.h.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Replace with appropriate types.h.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs recursive removal updates from Al Viro:
"We have quite a few places where synthetic filesystems do an
equivalent of 'rm -rf', with varying amounts of code duplication,
wrong locking, etc. That really ought to be a library helper.
Only debugfs (and very similar tracefs) are converted here - I have
more conversions, but they'd never been in -next, so they'll have to
wait"
* 'work.recursive_removal' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
simple_recursive_removal(): kernel-side rm -rf for ramfs-style filesystems
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs timestamp updates from Al Viro:
"More 64bit timestamp work"
* 'imm.timestamp' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
kernfs: don't bother with timestamp truncation
fs: Do not overload update_time
fs: Delete timespec64_trunc()
fs: ubifs: Eliminate timespec64_trunc() usage
fs: ceph: Delete timespec64_trunc() usage
fs: cifs: Delete usage of timespec64_trunc
fs: fat: Eliminate timespec64_trunc() usage
utimes: Clamp the timestamps in notify_change()
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When the directory is large and it's being modified by one client
while another client is doing the 'ls -l' on the same directory then
the cache page invalidation from nfs_force_use_readdirplus causes
the reading client to keep restarting READDIRPLUS from cookie 0
which causes the 'ls -l' to take a very long time to complete,
possibly never completing.
Currently when nfs_force_use_readdirplus is called to switch from
READDIR to READDIRPLUS, it invalidates all the cached pages of the
directory. This cache page invalidation causes the next nfs_readdir
to re-read the directory content from cookie 0.
This patch is to optimise the cache invalidation in
nfs_force_use_readdirplus by only truncating the cached pages from
last page index accessed to the end the file. It also marks the
inode to delay invalidating all the cached page of the directory
until the next initial nfs_readdir of the next 'ls' instance.
Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Reviewed-by: Trond Myklebust <trond.myklebust@hammerspace.com>
[Anna - Fix conflicts with Trond's readdir patches]
[Anna - Remove redundant call to nfs_zap_mapping()]
[Anna - Replace d_inode(file_dentry(desc->file)) with file_inode(desc->file)]
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
|
|
Pull Microblaze update from Michal Simek:
- enable CMA
- add support for MB v11
- defconfig updates
- minor fixes
* tag 'microblaze-v5.6-rc1' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: Add ID for Microblaze v11
microblaze: Prevent the overflow of the start
microblaze: Wire CMA allocator
asm-generic: Make dma-contiguous.h a mandatory include/asm header
microblaze: Sync defconfig with latest Kconfig layout
microblaze: defconfig: Disable EXT2 driver and Enable EXT3 & EXT4 drivers
microblaze: Align comments with register usage
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
Pull overlayfs update from Miklos Szeredi:
- Try to preserve holes in sparse files when copying up, thus saving
disk space and improving performance.
- Fix a performance regression introduced in v4.19 by preserving
asynchronicity of IO when fowarding to underlying layers. Add VFS
helpers to submit async iocbs.
- Fix a regression in lseek(2) introduced in v4.19 that breaks >2G
seeks on 32bit kernels.
- Fix a corner case where st_ino/st_dev was not preserved across copy
up.
- Miscellaneous fixes and cleanups.
* tag 'ovl-update-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: fix lseek overflow on 32bit
ovl: add splice file read write helper
ovl: implement async IO routines
vfs: add vfs_iocb_iter_[read|write] helper functions
ovl: layer is const
ovl: fix corner case of non-constant st_dev;st_ino
ovl: fix corner case of conflicting lower layer uuid
ovl: generalize the lower_fs[] array
ovl: simplify ovl_same_sb() helper
ovl: generalize the lower_layers[] array
ovl: improving copy-up efficiency for big sparse file
ovl: use ovl_inode_lock in ovl_llseek()
ovl: use pr_fmt auto generate prefix
ovl: fix wrong WARN_ON() in ovl_cache_update_ino()
|
|
dma-continuguous.h is generic for all architectures except arm32 which has
its own version.
Similar change was done for msi.h by commit a1b39bae16a6
("asm-generic: Make msi.h a mandatory include/asm header")
Suggested-by: Christoph Hellwig <hch@infradead.org>
Link: https://lore.kernel.org/linux-arm-kernel/20200117080446.GA8980@lst.de/T/#m92bb56b04161057635d4142e1b3b9b6b0a70122e
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Paul Walmsley <paul.walmsley@sifive.com> # for arch/riscv
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc
Pull remoteproc updates from Bjorn Andersson:
"This adds support for the Mediatek MT8183 SCP, modem remoteproc on
Qualcomm SC7180 platform, audio and sensor remoteprocs on Qualcomm
MSM8998 and audio, compute, modem and sensor remoteprocs on Qualcomm
SM8150.
It adds votes for necessary power-domains for all Qualcomm TrustZone
based remoteproc instances are held, fixes a bug related to remoteproc
drivers registering before the core has been initialized and does
clean up the Qualcomm modem remoteproc driver"
* tag 'rproc-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc: (21 commits)
remoteproc: qcom: q6v5-mss: Improve readability of reset_assert
remoteproc: qcom: q6v5-mss: Use regmap_read_poll_timeout
remoteproc: qcom: q6v5-mss: Rename boot status timeout
remoteproc: qcom: q6v5-mss: Improve readability across clk handling
remoteproc: use struct_size() helper
remoteproc: Initialize rproc_class before use
rpmsg: add rpmsg support for mt8183 SCP.
remoteproc/mediatek: add SCP support for mt8183
dt-bindings: Add a binding for Mediatek SCP
remoteproc: mss: q6v5-mss: Add modem support on SC7180
dt-bindings: remoteproc: qcom: Add Q6V5 Modem PIL binding for SC7180
remoteproc: qcom: pas: Add MSM8998 ADSP and SLPI support
dt-bindings: remoteproc: qcom: Add ADSP and SLPI support for MSM8998 SoC
remoteproc: q6v5-mss: Remove mem clk from the active pool
remoteproc: qcom: Remove unneeded semicolon
remoteproc: qcom: pas: Add auto_boot flag
remoteproc: qcom: pas: Add SM8150 ADSP, CDSP, Modem and SLPI support
dt-bindings: remoteproc: qcom: SM8150 Add ADSP, CDSP, MPSS and SLPI support
remoteproc: qcom: pas: Vote for active/proxy power domains
dt-bindings: remoteproc: qcom: Add power-domain bindings for Q6V5 PAS
...
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Merge more updates from Andrew Morton:
"The rest of MM and the rest of everything else: hotfixes, ipc, misc,
procfs, lib, cleanups, arm"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (67 commits)
ARM: dma-api: fix max_pfn off-by-one error in __dma_supported()
treewide: remove redundant IS_ERR() before error code check
include/linux/cpumask.h: don't calculate length of the input string
lib: new testcases for bitmap_parse{_user}
lib: rework bitmap_parse()
lib: make bitmap_parse_user a wrapper on bitmap_parse
lib: add test for bitmap_parse()
bitops: more BITS_TO_* macros
lib/string: add strnchrnul()
proc: convert everything to "struct proc_ops"
proc: decouple proc from VFS with "struct proc_ops"
asm-generic/tlb: provide MMU_GATHER_TABLE_FREE
asm-generic/tlb: rename HAVE_MMU_GATHER_NO_GATHER
asm-generic/tlb: rename HAVE_MMU_GATHER_PAGE_SIZE
asm-generic/tlb: rename HAVE_RCU_TABLE_FREE
asm-generic/tlb: add missing CONFIG symbol
asm-gemeric/tlb: remove stray function declarations
asm-generic/tlb: avoid potential double flush
mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush
powerpc/mmu_gather: enable RCU_TABLE_FREE even for !SMP case
...
|
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Pull drm ttm/mm updates from Dave Airlie:
"Thomas Hellstrom has some more changes to the TTM layer that needed a
patch to the mm subsystem.
This adds a new mm API vmf_insert_mixed_prot to avoid an ugly hack
that has limitations in the TTM layer"
* tag 'drm-next-2020-02-04' of git://anongit.freedesktop.org/drm/drm:
mm, drm/ttm: Fix vm page protection handling
mm: Add a vmf_insert_mixed_prot() function
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git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux
Pull chrome platform updates from Benson Leung:
"CrOS EC:
- Refactoring of some of cros_ec's headers:
include/linux/mfd/cros_ec.h now removed, new cros_ec.h added to
drivers/platform/chrome which contains shared operations of cros_ec
transport drivers.
- Response tracing in cros_ec_proto
Wilco EC:
- Fix unregistration order.
- Fix keyboard backlight probing on systems without keyboard
backlight
- Minor cleanup (newlines in printks, COMPILE_TEST)
Misc:
- chromeos_laptop converted to use i2c_new_scanned_device instead of
i2c_new_probed_device"
* tag 'tag-chrome-platform-for-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux:
platform/chrome: cros_ec: Match implementation with headers
platform/chrome: cros_ec: Drop unaligned.h include
platform/chrome: wilco_ec: Allow wilco to be compiled in COMPILE_TEST
platform/chrome: wilco_ec: Add newlines to printks
platform/chrome: wilco_ec: Fix unregistration order
cros_ec: treewide: Remove 'include/linux/mfd/cros_ec.h'
platform/chrome: cros_ec_ishtp: Make init_lock static
platform/chrome: chromeos_laptop: Convert to i2c_new_scanned_device
platform/chrome: cros_ec_lpc: Use platform_get_irq_optional() for optional IRQs
platform/chrome: cros_ec_proto: Add response tracing
platform/chrome: cros_ec_trace: Match trace commands with EC commands
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git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni:
"The VL_READ and VL_CLR ioctls have been reworked to be more useful.
This will not break userspace as there are very few users and they are
using the integer value as a boolean.
Apart from that, two drivers were reworked and a few fixes here and
there for a net reduction of number of lines.
Summary:
Subsystem:
- the VL_READ and VL_CLR ioctls are now documented and their behavior
is unified across all the drivers.
- RTC_I2C_AND_SPI Kconfig option rework to avoid selecting both
REGMAP_I2C and REGMAP_SPI unecessarily.
Drivers:
- at91rm9200: remove deprecated procfs, add sam9x60, sama5d4 and
sama5d2 compatibles.
- cmos: solve lost interrupts issue on MS Surface 3
- hym8563: return proper errno when time is invalid
- rv3029: many fixes, nvram support"
* tag 'rtc-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (63 commits)
dt-bindings: rtc: at91rm9200: document clocks property
rtc: i2c/spi: Avoid inclusion of REGMAP support when not needed
rtc: Kconfig: select REGMAP_I2C when necessary
rtc: Kconfig: properly indent sd3078 entry
rtc: cmos: Refactor code by using the new dmi_get_bios_year() helper
rtc: cmos: Use predefined value for RTC IRQ on legacy x86
rtc: cmos: Stop using shared IRQ
rtc: tps6586x: Use IRQ_NOAUTOEN flag
rtc: at91rm9200: use FIELD_PREP/FIELD_GET
rtc: at91rm9200: avoid time readout in at91_rtc_setalarm
rtc: at91rm9200: move register definitions to C file
rtc: at91rm9200: add sama5d4 and sama5d2 compatibles
dt-bindings: rtc: at91rm9200: convert bindings to json-schema
rtc: at91rm9200: remove procfs information
dt-bindings: atmel, at91rm9200-rtc: add microchip, sam9x60-rtc
rtc: pcf8563: Use BIT
rtc: moxart: Convert to SPDX identifier
rtc: ds1343: Remove unused struct spi_device in struct ds1343_priv
rtc: rx8025: Remove struct i2c_client from struct rx8025_data
rtc: hym8563: Read the valid flag directly instead of caching it
...
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New design of inner bitmap_parse() allows to avoid calculating the size of
a null-terminated string.
Link: http://lkml.kernel.org/r/20200102043031.30357-8-yury.norov@gmail.com
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Amritha Nambiar <amritha.nambiar@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: "Tobin C . Harding" <tobin@kernel.org>
Cc: Vineet Gupta <vineet.gupta1@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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bitmap_parse() is ineffective and full of opaque variables and opencoded
parts. It leads to hard understanding and usage of it. This rework
includes:
- remove bitmap_shift_left() call from the cycle. Now it makes the
complexity of the algorithm as O(nbits^2). In the suggested approach
the input string is parsed in reverse direction, so no shifts needed;
- relax requirement on a single comma and no white spaces between
chunks. It is considered useful in scripting, and it aligns with
bitmap_parselist();
- split bitmap_parse() to small readable helpers;
- make an explicit calculation of the end of input line at the
beginning, so users of the bitmap_parse() won't bother doing this.
Link: http://lkml.kernel.org/r/20200102043031.30357-6-yury.norov@gmail.com
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Cc: Amritha Nambiar <amritha.nambiar@intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: "Tobin C . Harding" <tobin@kernel.org>
Cc: Vineet Gupta <vineet.gupta1@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Introduce BITS_TO_U64, BITS_TO_U32 and BITS_TO_BYTES as they are handy in
the following patches (BITS_TO_U32 specifically). Reimplement tools/
version of the macros according to the kernel implementation.
Also fix indentation for BITS_PER_TYPE definition.
Link: http://lkml.kernel.org/r/20200102043031.30357-3-yury.norov@gmail.com
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Amritha Nambiar <amritha.nambiar@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: "Tobin C . Harding" <tobin@kernel.org>
Cc: Vineet Gupta <vineet.gupta1@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Patch series "lib: rework bitmap_parse", v5.
Similarl to the recently revisited bitmap_parselist(), bitmap_parse() is
ineffective and overcomplicated. This series reworks it, aligns its
interface with bitmap_parselist() and makes it simpler to use.
The series also adds a test for the function and fixes usage of it in
cpumask_parse() according to the new design - drops the calculating of
length of an input string.
bitmap_parse() takes the array of numbers to be put into the map in the BE
order which is reversed to the natural LE order for bitmaps. For example,
to construct bitmap containing a bit on the position 42, we have to put a
line '400,0'. Current implementation reads chunk one by one from the
beginning ('400' before '0') and makes bitmap shift after each successful
parse. It makes the complexity of the whole process as O(n^2). We can do
it in reverse direction ('0' before '400') and avoid shifting, but it
requires reverse parsing helpers.
This patch (of 7):
New function works like strchrnul() with a length limited string.
Link: http://lkml.kernel.org/r/20200102043031.30357-2-yury.norov@gmail.com
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Amritha Nambiar <amritha.nambiar@intel.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: "Tobin C . Harding" <tobin@kernel.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Vineet Gupta <vineet.gupta1@synopsys.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
The most notable change is DEFINE_SHOW_ATTRIBUTE macro split in
seq_file.h.
Conversion rule is:
llseek => proc_lseek
unlocked_ioctl => proc_ioctl
xxx => proc_xxx
delete ".owner = THIS_MODULE" line
[akpm@linux-foundation.org: fix drivers/isdn/capi/kcapi_proc.c]
[sfr@canb.auug.org.au: fix kernel/sched/psi.c]
Link: http://lkml.kernel.org/r/20200122180545.36222f50@canb.auug.org.au
Link: http://lkml.kernel.org/r/20191225172546.GB13378@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Currently core /proc code uses "struct file_operations" for custom hooks,
however, VFS doesn't directly call them. Every time VFS expands
file_operations hook set, /proc code bloats for no reason.
Introduce "struct proc_ops" which contains only those hooks which /proc
allows to call into (open, release, read, write, ioctl, mmap, poll). It
doesn't contain module pointer as well.
Save ~184 bytes per usage:
add/remove: 26/26 grow/shrink: 1/4 up/down: 1922/-6674 (-4752)
Function old new delta
sysvipc_proc_ops - 72 +72
...
config_gz_proc_ops - 72 +72
proc_get_inode 289 339 +50
proc_reg_get_unmapped_area 110 107 -3
close_pdeo 227 224 -3
proc_reg_open 289 284 -5
proc_create_data 60 53 -7
rt_cpu_seq_fops 256 - -256
...
default_affinity_proc_fops 256 - -256
Total: Before=5430095, After=5425343, chg -0.09%
Link: http://lkml.kernel.org/r/20191225172228.GA13378@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
As described in the comment, the correct order for freeing pages is:
1) unhook page
2) TLB invalidate page
3) free page
This order equally applies to page directories.
Currently there are two correct options:
- use tlb_remove_page(), when all page directores are full pages and
there are no futher contraints placed by things like software
walkers (HAVE_FAST_GUP).
- use MMU_GATHER_RCU_TABLE_FREE and tlb_remove_table() when the
architecture does not do IPI based TLB invalidate and has
HAVE_FAST_GUP (or software TLB fill).
This however leaves architectures that don't have page based directories
but don't need RCU in a bind. For those, provide MMU_GATHER_TABLE_FREE,
which provides the independent batching for directories without the
additional RCU freeing.
Link: http://lkml.kernel.org/r/20200116064531.483522-10-aneesh.kumar@linux.ibm.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Towards a more consistent naming scheme.
Link: http://lkml.kernel.org/r/20200116064531.483522-9-aneesh.kumar@linux.ibm.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Towards a more consistent naming scheme.
Link: http://lkml.kernel.org/r/20200116064531.483522-8-aneesh.kumar@linux.ibm.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Towards a more consistent naming scheme.
[akpm@linux-foundation.org: fix sparc64 Kconfig]
Link: http://lkml.kernel.org/r/20200116064531.483522-7-aneesh.kumar@linux.ibm.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
We removed the actual functions a while ago.
Link: http://lkml.kernel.org/r/20200116064531.483522-5-aneesh.kumar@linux.ibm.com
Fixes: 1808d65b55e4 ("asm-generic/tlb: Remove arch_tlb*_mmu()")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
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Aneesh reported that:
tlb_flush_mmu()
tlb_flush_mmu_tlbonly()
tlb_flush() <-- #1
tlb_flush_mmu_free()
tlb_table_flush()
tlb_table_invalidate()
tlb_flush_mmu_tlbonly()
tlb_flush() <-- #2
does two TLBIs when tlb->fullmm, because __tlb_reset_range() will not
clear tlb->end in that case.
Observe that any caller to __tlb_adjust_range() also sets at least one of
the tlb->freed_tables || tlb->cleared_p* bits, and those are
unconditionally cleared by __tlb_reset_range().
Change the condition for actually issuing TLBI to having one of those bits
set, as opposed to having tlb->end != 0.
Link: http://lkml.kernel.org/r/20200116064531.483522-4-aneesh.kumar@linux.ibm.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reported-by: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Architectures for which we have hardware walkers of Linux page table
should flush TLB on mmu gather batch allocation failures and batch flush.
Some architectures like POWER supports multiple translation modes (hash
and radix) and in the case of POWER only radix translation mode needs the
above TLBI. This is because for hash translation mode kernel wants to
avoid this extra flush since there are no hardware walkers of linux page
table. With radix translation, the hardware also walks linux page table
and with that, kernel needs to make sure to TLB invalidate page walk cache
before page table pages are freed.
More details in commit d86564a2f085 ("mm/tlb, x86/mm: Support invalidating
TLB caches for RCU_TABLE_FREE")
The changes to sparc are to make sure we keep the old behavior since we
are now removing HAVE_RCU_TABLE_NO_INVALIDATE. The default value for
tlb_needs_table_invalidate is to always force an invalidate and sparc can
avoid the table invalidate. Hence we define tlb_needs_table_invalidate to
false for sparc architecture.
Link: http://lkml.kernel.org/r/20200116064531.483522-3-aneesh.kumar@linux.ibm.com
Fixes: a46cc7a90fd8 ("powerpc/mm/radix: Improve TLB/PWC flushes")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc]
Cc: <stable@vger.kernel.org> [4.14+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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struct mm_struct is quite large (~1664 bytes) and so allocating on the
stack may cause problems as the kernel stack size is small.
Since ptdump_walk_pgd_level_core() was only allocating the structure so
that it could modify the pgd argument we can instead introduce a pgd
override in struct mm_walk and pass this down the call stack to where it
is needed.
Since the correct mm_struct is now being passed down, it is now also
unnecessary to take the mmap_sem semaphore because ptdump_walk_pgd() will
now take the semaphore on the real mm.
[steven.price@arm.com: restore missed arm64 changes]
Link: http://lkml.kernel.org/r/20200108145710.34314-1-steven.price@arm.com
Link: http://lkml.kernel.org/r/20200108145710.34314-1-steven.price@arm.com
Signed-off-by: Steven Price <steven.price@arm.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Zong Li <zong.li@sifive.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Rather than having to increment the 'depth' number by 1 in ptdump_hole(),
let's change the meaning of 'level' in note_page() since that makes the
code simplier.
Note that for x86, the level numbers were previously increased by 1 in
commit 45dcd2091363 ("x86/mm/dump_pagetables: Fix printout of p4d level")
and the comment "Bit 7 has a different meaning" was not updated, so this
change also makes the code match the comment again.
Link: http://lkml.kernel.org/r/20191218162402.45610-24-steven.price@arm.com
Signed-off-by: Steven Price <steven.price@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Zong Li <zong.li@sifive.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Add a generic version of page table dumping that architectures can opt-in
to.
Link: http://lkml.kernel.org/r/20191218162402.45610-20-steven.price@arm.com
Signed-off-by: Steven Price <steven.price@arm.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Zong Li <zong.li@sifive.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The pte_hole() callback is called at multiple levels of the page tables.
Code dumping the kernel page tables needs to know what at what depth the
missing entry is. Add this is an extra parameter to pte_hole(). When the
depth isn't know (e.g. processing a vma) then -1 is passed.
The depth that is reported is the actual level where the entry is missing
(ignoring any folding that is in place), i.e. any levels where
PTRS_PER_P?D is set to 1 are ignored.
Note that depth starts at 0 for a PGD so that PUD/PMD/PTE retain their
natural numbers as levels 2/3/4.
Link: http://lkml.kernel.org/r/20191218162402.45610-16-steven.price@arm.com
Signed-off-by: Steven Price <steven.price@arm.com>
Tested-by: Zong Li <zong.li@sifive.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Since 48684a65b4e3: "mm: pagewalk: fix misbehavior of walk_page_range for
vma(VM_PFNMAP)", page_table_walk() will report any kernel area as a hole,
because it lacks a vma.
This means each arch has re-implemented page table walking when needed,
for example in the per-arch ptdump walker.
Remove the requirement to have a vma in the generic code and add a new
function walk_page_range_novma() which ignores the VMAs and simply walks
the page tables.
Link: http://lkml.kernel.org/r/20191218162402.45610-13-steven.price@arm.com
Signed-off-by: Steven Price <steven.price@arm.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Zong Li <zong.li@sifive.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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