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2013-10-24s390/appldata: make copy_from_user() invocations provably correctHeiko Carstens1-3/+5
Just change the type of "len" to unsigned int so the compiler can prove that we don't have a buffer overflow (and generates less code). We get rid of these: In function 'copy_from_user', inlined from 'appldata_interval_handler' at arch/s390/appldata/appldata_base.c:265: uaccess.h:303: warning: call to 'copy_from_user_overflow' declared with attribute warning: copy_from_user() buffer size is not provably correct In function 'copy_from_user', inlined from 'appldata_timer_handler' at arch/s390/appldata/appldata_base.c:225: uaccess.h:303: warning: call to 'copy_from_user_overflow' declared with attribute warning: copy_from_user() buffer size is not provably correct In function 'copy_from_user', inlined from 'appldata_generic_handler' at arch/s390/appldata/appldata_base.c:333: uaccess.h:303: warning: call to 'copy_from_user_overflow' declared with attribute warning: copy_from_user() buffer size is not provably correct Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/cmm: make copy_from_user() invocation provably correctHeiko Carstens1-2/+2
Get rid of these two warnings: In function 'copy_from_user', inlined from 'cmm_timeout_handler' at arch/s390/mm/cmm.c:310: uaccess.h:303: warning: call to 'copy_from_user_overflow' declared with attribute warning: copy_from_user() buffer size is not provably correct In function 'copy_from_user', inlined from 'cmm_pages_handler' at arch/s390/mm/cmm.c:270: uaccess.h:303: warning: call to 'copy_from_user_overflow' declared with attribute warning: copy_from_user() buffer size is not provably correct Change the "len" type to unsigned int, so we can make sure that there is no buffer overflow. This also generates less code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/cache: get rid of compile warningHeiko Carstens1-3/+2
Get rid of this one: arch/s390/kernel/cache.c: In function 'cache_build_info': arch/s390/kernel/cache.c:144: warning: 'private' may be used uninitialized in this function Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/compat,signal: change return values to -EFAULTHeiko Carstens2-17/+19
Instead of returnin the number of bytes not copied and/or -EFAULT let the signal handler helper functions always return -EFAULT if a user space access failed. This doesn't fix a bug in the current code, but makes is harder to get it wrong in the future. Also "smatch" won't complain anymore about the fact that the number of remaining bytes gets returned instead of -EFAULT. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390: Remove unused declaration of zfcpdump_prefix_array[]Michael Holzheu1-1/+0
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/cio: fix error-prone definesPeter Oberparleiter1-19/+19
Missing parenthesis may cause problems when using the defines together with operations of higher precedence. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390: Remove zfcpdump NR_CPUS dependencyMichael Holzheu4-15/+40
Currently zfpcdump can only collect registers for up to CONFIG_NR_CPUS CPUss. This dependency is not necessary. So remove it by dynamically allocating the save area array. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/ftrace: prepare_ftrace_return() function call orderHeiko Carstens1-5/+4
Steven Rostedt noted that s390 is the only architecture which calls ftrace_push_return_trace() before ftrace_graph_entry() and therefore has the small advantage that trace.depth gets initialized automatically. However this small advantage isn't worth the difference and possible subtle breakage that may result from this. So change s390 to have the same function call order like all other architectures: first ftrace_graph_entry(), then ftrace_push_return_trace() Reported-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/crashdump: remove unused variableHeiko Carstens1-1/+0
Get rid of this compile warning: arch/s390/kernel/crash_dump.c: In function 'copy_from_realmem': arch/s390/kernel/crash_dump.c:48:6: warning: unused variable 'rc' [-Wunused-variable] int rc; ^ Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/atomic: use 'unsigned int' instead of 'unsigned long' for atomic_*_mask()Chen Gang1-2/+2
The type of 'v->counter' is always 'int', and related inline assembly code also process 'int', so use 'unsigned int' instead of 'unsigned long' for the 'mask'. Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/gup: handle zero nr_pages case correctlyHeiko Carstens1-1/+1
If [__]get_user_pages_fast() gets called with nr_pages == 0, the current code would walk the page tables and pin as many pages until the first invalid pte (or the kernel crashed while writing struct page pointers to the pages array). So let's handle at least the nr_pages == 0 case correctly and exit early. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/gup: reduce code duplication between [__]get_user_pages_fast functionsHeiko Carstens1-58/+23
Just call __get_user_pages_fast() from get_user_pages_fast() like powerpc. This saves a lot of duplicated code. Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/mm: do not initialize storage keysMartin Schwidefsky3-2/+11
With dirty and referenced bits implemented in software it is unnecessary to initialize the storage key for every page. With this patch not a single storage key operation is done for a system that does not use KVM. For KVM set_pte_at/pgste_set_key will do the initialization for the guest view of the storage key when the mapping for the page is established in the host. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/bpf,jit: fix prolog oddityMartin Schwidefsky1-2/+2
The prolog of functions generated by the bpf jit compiler uses an instruction sequence with an "ahi" instruction to create stack space instead of using an "aghi" instruction. Using the 32-bit "ahi" is not wrong as the stack we are operating on is an order-4 allocation which is always aligned to 16KB. But it is more consistent to use an "aghi" as the stack pointer is a 64-bit value. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390: cleanup and add sanity checks to control register macrosHeiko Carstens1-61/+51
- turn some macros into functions - merge two almost identical versions for 32/64 bit - add BUILD_BUG_ON() check to make sure the passed in array is large enough Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/pci: implement hibernation hooksSebastian Ott1-0/+41
Implement architecture-specific functionality when a PCI device is doing a hibernate transition. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/uaccess: always run the kernel in home spaceMartin Schwidefsky21-459/+51
Simplify the uaccess code by removing the user_mode=home option. The kernel will now always run in the home space mode. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/bitops: rename find_first_bit_left() to find_first_bit_inv()Heiko Carstens2-10/+39
find_first_bit_left() and friends have nothing to do with the normal LSB0 bit numbering for big endian machines used in Linux (least significant bit has bit number 0). Instead they use MSB0 bit numbering, where the most signficant bit has bit number 0. So rename find_first_bit_left() and friends to find_first_bit_inv(), to avoid any confusion. Also provide inv versions of set_bit, clear_bit and test_bit. This also removes the confusing use of e.g. set_bit() in airq.c which uses a "be_to_le" bit number conversion, which could imply that instead set_bit_le() could be used. But that is entirely wrong since the _le bitops variant uses yet another bit numbering scheme. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/bitops: use flogr instruction to implement __ffs, ffs, __fls, fls and fls64Heiko Carstens1-0/+125
Since z9 109 we have the flogr instruction which can be used to implement optimized versions of __ffs, ffs, __fls, fls and fls64. So implement and use them, instead of the generic variants. This reduces the size of the kernel image (defconfig, -march=z9-109) by 19,648 bytes. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/bitops: use generic find bit functions / reimplement _left variantHeiko Carstens6-604/+126
Just like all other architectures we should use out-of-line find bit operations, since the inline variant bloat the size of the kernel image. And also like all other architecures we should only supply optimized variants of the __ffs, ffs, etc. primitives. Therefore this patch removes the inlined s390 find bit functions and uses the generic out-of-line variants instead. The optimization of the primitives follows with the next patch. With this patch also the functions find_first_bit_left() and find_next_bit_left() have been reimplemented, since logically, they are nothing else but a find_first_bit()/find_next_bit() implementation that use an inverted __fls() instead of __ffs(). Also the restriction that these functions only work on machines which support the "flogr" instruction is gone now. This reduces the size of the kernel image (defconfig, -march=z9-109) by 144,482 bytes. Alone the size of the function build_sched_domains() gets reduced from 7 KB to 3,5 KB. We also git rid of unused functions like find_first_bit_le()... Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/s390dbf: add debug_level_enabled() functionHendrik Brueckner1-0/+5
Add the debug_level_enabled() function to check if debug events for a particular level would be logged. This might help to save cycles for debug events that require additional information collection. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/bitops: optimize set_bit() for constant valuesHeiko Carstens2-1/+37
Since zEC12 we have the interlocked-access facility 2 which allows to use the instructions ni/oi/xi to update a single byte in storage with compare-and-swap semantics. So change set_bit(), clear_bit() and change_bit() to generate such code instead of a compare-and-swap loop (or using the load-and-* instruction family), if possible. This reduces the text segment by yet another 8KB (defconfig). Alternatively the long displacement variants niy/oiy/xiy could have been used, but the extended displacement field is usually not needed and therefore would only increase the size of the text segment again. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/bitops: remove CONFIG_SMP / simplify non-atomic bitopsHeiko Carstens2-217/+65
Remove CONFIG_SMP from bitops code. This reduces the C code significantly but also generates better code for the SMP case. This means that for !CONFIG_SMP set_bit() and friends now also have compare and swap semantics (read: more code). However nobody really cares for !CONFIG_SMP and this is the trade-off to simplify the SMP code which we do care about. The non-atomic bitops like __set_bit() now generate also better code because the old code did not have a __builtin_contant_p() check for the CONFIG_SMP case and therefore always generated the inline assembly variant. However the inline assemblies for the non-atomic case now got completely removed since gcc can produce better code, which accesses less memory operands. test_bit() got also a bit simplified since it did have a __builtin_constant_p() check, however two identical code pathes for each case (written differently). In result this mainly reduces the to be maintained code but is not very relevant for code generation, since there are not many non-atomic bitops usages that we care about. (code reduction defconfig kernel image before/after: 560 bytes). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/atomic: various small cleanupsHeiko Carstens1-18/+24
- add a typecheck to the defines to make sure they operate on an atomic_t - simplify inline assembly constraints - keep variable names common between functions Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/atomic: optimize atomic_add() for constant valuesHeiko Carstens1-8/+40
If the interlocked-access facility 1 is available we can use the asi and agsi instructions for interlocked updates if the to be added value is a contanst and small (in the range of -128..127). asi and agsi do not not return the old or new value, therefore these instructions can only be used for atomic_(add|sub|inc|dec)[64]. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/kprobes: allow kprobes only on known instructionsHeiko Carstens3-1/+9
Since we have an in-kernel disassembler we can make sure that there won't be any kprobes set on random data. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/kprobes: use insn_length helper functionHeiko Carstens1-4/+5
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/dis: move disassembler function prototypes to proper header fileHeiko Carstens5-6/+7
Now that the in-kernel disassembler has an own header file move the disassembler related function prototypes to that header file. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/dis: move common definitions to a header fileSuzuki K. Poulose2-28/+43
The patch moves some of the definitions to a header file. No functional changes involved. I have retained the Copyright Statement from the original file. Signed-off-by: Suzuki K Poulose <suzuki@in.ibm.com> [Heiko Carstens: rename s390-dis.h to dis.h] Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/dis: rename structures for unique typesSuzuki K. Poulose1-28/+28
Rename 'insn' and 'operand' structures to more canonical names to avoid conflicts. struct insn represents information about an instruction, including the mnemonics, format and opcode. struct operand represents the 'properties' and information on howto interpret the operand value and doesn't contain the value. We rename these structures for avoiding a global conflict. i.e, 1,$s/struct insn/struct s390_insn/g 1,$s/struct operand/struct s390_operand/g Signed-off-by: Suzuki K Poulose <suzuki@in.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/atomic: make use of interlocked-access facility 1 instructionsHeiko Carstens1-12/+65
Same as for bitops: make use of the interlocked-access facility 1 instructions which allow to atomically update storage locations without a compare-and-swap loop. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/atomic: implement atomic_sub_return() with atomic_add_return()Heiko Carstens1-21/+2
Get rid of the own atomic_sub_return() implementation. Otherwise we can't make use of the interlocked-access facility 1 instructions for atomic_sub_return(), since there is no "load and subtract" instruction available. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/kprobes: have more correct if statement in s390_get_insn_slot()Heiko Carstens1-1/+1
When checking the insn address wether it is a kernel image or module address it should be an if-else-if statement not two independent if statements. This doesn't really fix a bug, but matches s390_free_insn_slot(). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390: always set -march compiler optionHeiko Carstens1-7/+7
Currently we only set the -march compiler option if the kbuild system figured out that the compiler actually supports the selected architecture (cc-option test). In result this means that no -march compiler option is set when an unsupported cpu architecture of the current compiler is selected. The kernel compile will afterwards succeed but with the default architecture instead of the (unsupported) selected one. Change this behaviour, so compiles will fail if the compiler does not support the selected cpu architecture. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24s390/bitops: make use of interlocked-access facility 1 instructionsHeiko Carstens1-17/+49
Make use of the interlocked-access facility 1 that got added with the z196 architecure. This facilility added new instructions which can atomically update a storage location without a compare-and-swap loop. E.g. setting a bit within a "long" can be done with a single instruction. The size of the kernel image gets ~30kb smaller. Considering that there are appr. 1900 bitops call sites this means that each one saves about 15-16 bytes per call site which is expected. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-23Merge branch 'for-linus' of ↵Linus Torvalds6-28/+30
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 fixes from Martin Schwidefsky: "Several last minute bug fixes. Two of them are on the larger side for rc7, the dasd format patch for older storage devices and the store-clock-fast patch where we have been to optimistic with an optimization" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/time: correct use of store clock fast s390/vmlogrdr: fix array access in vmlogrdr_open() s390/compat,signal: fix return value of copy_siginfo_(to|from)_user32() s390/dasd: check for availability of prefix command during format s390/mm,kvm: fix software dirty bits vs. kvm for old machines
2013-10-23Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds1-1/+3
Pull networking fixes from David Miller: "Sorry I let so much accumulate, I was in Buffalo and wanted a few things to cook in my tree for a while before sending to you. Anyways, it's a lot of little things as usual at this stage in the game" 1) Make bonding MAINTAINERS entry reflect reality, from Andy Gospodarek. 2) Fix accidental sock_put() on timewait mini sockets, from Eric Dumazet. 3) Fix crashes in l2tp due to mis-handling of ipv4 mapped ipv6 addresses, from François CACHEREUL. 4) Fix heap overflow in __audit_sockaddr(), from the eagle eyed Dan Carpenter. 5) tcp_shifted_skb() doesn't take handle FINs properly, from Eric Dumazet. 6) SFC driver bug fixes from Ben Hutchings. 7) Fix TX packet scheduling wedge after channel change in ath9k driver, from Felix Fietkau. 8) Fix user after free in BPF JIT code, from Alexei Starovoitov. 9) Source address selection test is reversed in __ip_route_output_key(), fix from Jiri Benc. 10) VLAN and CAN layer mis-size netlink attributes, from Marc Kleine-Budde. 11) Fix permission checks in sysctls to use current_euid() instead of current_uid(). From Eric W Biederman. 12) IPSEC policies can go away while a timer is still pending for them, add appropriate ref-counting to fix, from Steffen Klassert. 13) Fix mis-programming of FDR and RMCR registers on R8A7740 sh_eth chips, from Nguyen Hong Ky and Simon Horman. 14) MLX4 forgets to DMA unmap pages on RX, fix from Amir Vadai. 15) IPV6 GRE tunnel MTU upper limit is miscalculated, from Oussama Ghorbel. 16) Fix typo in fq_change(), we were assigning "initial quantum" to "quantum". From Eric Dumazet. 17) Set a more appropriate sk_pacing_rate for non-TCP sockets, otherwise FQ packet scheduler does not pace those flows properly. Also from Eric Dumazet. 18) rtlwifi miscalculates packet pointers, from Mark Cave-Ayland. 19) l2tp_xmit_skb() can be called from process context, not just softirq context, so we must always make sure to BH disable around it. From Eric Dumazet. 20) On qdisc reset, we forget to purge the RB tree of SKBs in netem packet scheduler. From Stephen Hemminger. 21) Fix info leak in farsync WAN driver ioctl() handler, from Dan Carpenter and Salva Peiró. 22) Fix PHY reset and other issues in dm9000 driver, from Nikita Kiryanov and Michael Abbott. 23) When hardware can do SCTP crc32 checksums, we accidently don't disable the csum offload when IPSEC transformations have been applied. From Fan Du and Vlad Yasevich. 24) Tail loss probing in TCP leaves the socket in the wrong congestion avoidance state. From Yuchung Cheng. 25) In CPSW driver, enable NAPI before interrupts are turned on, from Markus Pargmann. 26) Integer underflow and dual-assignment in YAM hamradio driver, from Dan Carpenter. 27) If we are going to mangle a packet in tcp_set_skb_tso_segs() we must unclone it. This fixes various hard to track down crashes in drivers where the SKBs ->gso_segs was changing right from underneath the driver during TX queueing. From Eric Dumazet. 28) Fix the handling of VLAN IDs, and in particular the special IDs 0 and 4095, in the bridging layer. From Toshiaki Makita. 29) Another info leak, this time in wanxl WAN driver, from Salva Peiró. 30) Fix race in socket credential passing, from Daniel Borkmann. 31) WHen NETLABEL is disabled, we don't validate CIPSO packets properly, from Seif Mazareeb. 32) Fix identification of fragmented frames in ipv4/ipv6 UDP Fragmentation Offload output paths, from Jiri Pirko. 33) Virtual Function fixes in bnx2x driver from Yuval Mintz and Ariel Elior. 34) When we removed the explicit neighbour pointer from ipv6 routes a slight regression was introduced for users such as IPVS, xt_TEE, and raw sockets. We mix up the users requested destination address with the routes assigned nexthop/gateway. From Julian Anastasov and Simon Horman. 35) Fix stack overruns in rt6_probe(), the issue is that can end up doing two full packet xmit paths at the same time when emitting neighbour discovery messages. From Hannes Frederic Sowa. 36) davinci_emac driver doesn't handle IFF_ALLMULTI correctly, from Mariusz Ceier. 37) Make sure to set TCP sk_pacing_rate after the first legitimate RTT sample, from Neal Cardwell. 38) Wrong netlink attribute passed to xfrm_replay_verify_len(), from Steffen Klassert. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (152 commits) ax88179_178a: Add VID:DID for Samsung USB Ethernet Adapter ax88179_178a: Correct the RX error definition in RX header Revert "bridge: only expire the mdb entry when query is received" tcp: initialize passive-side sk_pacing_rate after 3WHS davinci_emac.c: Fix IFF_ALLMULTI setup mac802154: correct a typo in ieee802154_alloc_device() prototype ipv6: probe routes asynchronous in rt6_probe netfilter: nf_conntrack: fix rt6i_gateway checks for H.323 helper ipv6: fill rt6i_gateway with nexthop address ipv6: always prefer rt6i_gateway if present bnx2x: Set NETIF_F_HIGHDMA unconditionally bnx2x: Don't pretend during register dump bnx2x: Lock DMAE when used by statistic flow bnx2x: Prevent null pointer dereference on error flow bnx2x: Fix config when SR-IOV and iSCSI are enabled bnx2x: Fix Coalescing configuration bnx2x: Unlock VF-PF channel on MAC/VLAN config error bnx2x: Prevent an illegal pointer dereference during panic bnx2x: Fix Maximum CoS estimation for VFs drivers: net: cpsw: fix kernel warn during iperf test with interrupt pacing ...
2013-10-22s390/time: correct use of store clock fastMartin Schwidefsky4-25/+25
The result of the store-clock-fast (STCKF) instruction is a bit fuzzy. It can happen that the value stored on one CPU is smaller than the value stored on another CPU, although the order of the stores is the other way around. This can cause deltas of get_tod_clock() values to become negative when they should not be. We need to be more careful with store-clock-fast, this patch partially reverts git commit e4b7b4238e666682555461fa52eecd74652f36bb "time: always use stckf instead of stck if available". The get_tod_clock() function now uses the store-clock-extended (STCKE) instruction. get_tod_clock_fast() can be used if the fuzziness of store-clock-fast is acceptable e.g. for wait loops local to a CPU. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-15s390/compat,signal: fix return value of copy_siginfo_(to|from)_user32()Heiko Carstens1-2/+2
The return value of copy_siginfo_(to|from)_user32() gets passed to user space, however we do not convert a positive return value from copy_(to|from)_user to -EFAULT. Therefore these functions (and the calling system calls) my incorrectly return a positive number (bytes not copied) instead of -EFAULT. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-15s390/mm,kvm: fix software dirty bits vs. kvm for old machinesMartin Schwidefsky1-1/+3
For machines without enhanced supression on protection the software dirty bit code forces the pte dirty bit and clears the page protection bit in pgste_set_pte. This is done for all pte types, the check for present ptes is missing. As a result swap ptes and other not-present ptes can get corrupted. Add a check for the _PAGE_PRESENT bit to pgste_set_pte before modifying the pte value. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-11compiler/gcc4: Add quirk for 'asm goto' miscompilation bugIngo Molnar1-1/+1
Fengguang Wu, Oleg Nesterov and Peter Zijlstra tracked down a kernel crash to a GCC bug: GCC miscompiles certain 'asm goto' constructs, as outlined here: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670 Implement a workaround suggested by Jakub Jelinek. Reported-and-tested-by: Fengguang Wu <fengguang.wu@intel.com> Reported-by: Oleg Nesterov <oleg@redhat.com> Reported-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Suggested-by: Jakub Jelinek <jakub@redhat.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-10-07net: fix unsafe set_memory_rw from softirqAlexei Starovoitov1-1/+3
on x86 system with net.core.bpf_jit_enable = 1 sudo tcpdump -i eth1 'tcp port 22' causes the warning: [ 56.766097] Possible unsafe locking scenario: [ 56.766097] [ 56.780146] CPU0 [ 56.786807] ---- [ 56.793188] lock(&(&vb->lock)->rlock); [ 56.799593] <Interrupt> [ 56.805889] lock(&(&vb->lock)->rlock); [ 56.812266] [ 56.812266] *** DEADLOCK *** [ 56.812266] [ 56.830670] 1 lock held by ksoftirqd/1/13: [ 56.836838] #0: (rcu_read_lock){.+.+..}, at: [<ffffffff8118f44c>] vm_unmap_aliases+0x8c/0x380 [ 56.849757] [ 56.849757] stack backtrace: [ 56.862194] CPU: 1 PID: 13 Comm: ksoftirqd/1 Not tainted 3.12.0-rc3+ #45 [ 56.868721] Hardware name: System manufacturer System Product Name/P8Z77 WS, BIOS 3007 07/26/2012 [ 56.882004] ffffffff821944c0 ffff88080bbdb8c8 ffffffff8175a145 0000000000000007 [ 56.895630] ffff88080bbd5f40 ffff88080bbdb928 ffffffff81755b14 0000000000000001 [ 56.909313] ffff880800000001 ffff880800000000 ffffffff8101178f 0000000000000001 [ 56.923006] Call Trace: [ 56.929532] [<ffffffff8175a145>] dump_stack+0x55/0x76 [ 56.936067] [<ffffffff81755b14>] print_usage_bug+0x1f7/0x208 [ 56.942445] [<ffffffff8101178f>] ? save_stack_trace+0x2f/0x50 [ 56.948932] [<ffffffff810cc0a0>] ? check_usage_backwards+0x150/0x150 [ 56.955470] [<ffffffff810ccb52>] mark_lock+0x282/0x2c0 [ 56.961945] [<ffffffff810ccfed>] __lock_acquire+0x45d/0x1d50 [ 56.968474] [<ffffffff810cce6e>] ? __lock_acquire+0x2de/0x1d50 [ 56.975140] [<ffffffff81393bf5>] ? cpumask_next_and+0x55/0x90 [ 56.981942] [<ffffffff810cef72>] lock_acquire+0x92/0x1d0 [ 56.988745] [<ffffffff8118f52a>] ? vm_unmap_aliases+0x16a/0x380 [ 56.995619] [<ffffffff817628f1>] _raw_spin_lock+0x41/0x50 [ 57.002493] [<ffffffff8118f52a>] ? vm_unmap_aliases+0x16a/0x380 [ 57.009447] [<ffffffff8118f52a>] vm_unmap_aliases+0x16a/0x380 [ 57.016477] [<ffffffff8118f44c>] ? vm_unmap_aliases+0x8c/0x380 [ 57.023607] [<ffffffff810436b0>] change_page_attr_set_clr+0xc0/0x460 [ 57.030818] [<ffffffff810cfb8d>] ? trace_hardirqs_on+0xd/0x10 [ 57.037896] [<ffffffff811a8330>] ? kmem_cache_free+0xb0/0x2b0 [ 57.044789] [<ffffffff811b59c3>] ? free_object_rcu+0x93/0xa0 [ 57.051720] [<ffffffff81043d9f>] set_memory_rw+0x2f/0x40 [ 57.058727] [<ffffffff8104e17c>] bpf_jit_free+0x2c/0x40 [ 57.065577] [<ffffffff81642cba>] sk_filter_release_rcu+0x1a/0x30 [ 57.072338] [<ffffffff811108e2>] rcu_process_callbacks+0x202/0x7c0 [ 57.078962] [<ffffffff81057f17>] __do_softirq+0xf7/0x3f0 [ 57.085373] [<ffffffff81058245>] run_ksoftirqd+0x35/0x70 cannot reuse jited filter memory, since it's readonly, so use original bpf insns memory to hold work_struct defer kfree of sk_filter until jit completed freeing tested on x86_64 and i386 Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-30s390: fix system call restart after inferior callMartin Schwidefsky2-0/+2
Git commit 616498813b11ffef "s390: system call path micro optimization" introduced a regression in regard to system call restarting and inferior function calls via the ptrace interface. The pointer to the system call table needs to be loaded in sysc_sigpending if do_signal returns with TIF_SYSCALl set after it restored a system call context. Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-09-30s390: Allow vmalloc target buffers for copy_from_oldmem()Michael Holzheu1-22/+20
Currently copy_from_oldmem() is not able to copy to virtual memory. When using kexec pre-allocated ELF header, copy_from_oldmem() is used to copy the ELF notes information to vmalloc buffers. So fix this and use the new function copy_from_realmem() that allows copying also to vmalloc memory. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-09-30s390/kprobes: add exrl to list of prohibited opcodesHeiko Carstens1-1/+5
"execute relative long" may have all sorts of side effects dependend on the instructions it executes. Therefore prohibit setting a kprobe on exrl just like we do for the regular execute instruction. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-09-28s390: enable ARCH_USE_CMPXCHG_LOCKREFHeiko Carstens2-0/+6
Enable ARCH_USE_CMPXCHG_LOCKREF since it shows performance improvements with Linus' simple stat() test case of up to 50% on a 30 cpu system. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-28mutex: replace CONFIG_HAVE_ARCH_MUTEX_CPU_RELAX with simple ifdefHeiko Carstens3-3/+2
Linus suggested to replace #ifndef CONFIG_HAVE_ARCH_MUTEX_CPU_RELAX #define arch_mutex_cpu_relax() cpu_relax() #endif with just a simple #ifndef arch_mutex_cpu_relax # define arch_mutex_cpu_relax() cpu_relax() #endif to get rid of CONFIG_HAVE_CPU_RELAX_SIMPLE. So architectures can simply define arch_mutex_cpu_relax if they want an architecture specific function instead of having to add a select statement in their Kconfig in addition. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-13Remove GENERIC_HARDIRQ config optionMartin Schwidefsky1-1/+0
After the last architecture switched to generic hard irqs the config options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code for !CONFIG_GENERIC_HARDIRQS can be removed. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-09-12arch: mm: pass userspace fault flag to generic fault handlerJohannes Weiner1-0/+2
Unlike global OOM handling, memory cgroup code will invoke the OOM killer in any OOM situation because it has no way of telling faults occuring in kernel context - which could be handled more gracefully - from user-triggered faults. Pass a flag that identifies faults originating in user space from the architecture-specific fault handlers to generic code so that memcg OOM handling can be improved. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Michal Hocko <mhocko@suse.cz> Cc: David Rientjes <rientjes@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: azurIt <azurit@pobox.sk> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11s390/vmcore: use vmcore for zfcpdumpMichael Holzheu3-19/+107
Modify the s390 copy_oldmem_page() and remap_oldmem_pfn_range() function for zfcpdump to read from the HSA memory if memory below HSA_SIZE bytes is requested. Otherwise real memory is used. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Jan Willeke <willeke@de.ibm.com> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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