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2018-04-20kexec_file: do not add extra alignment to efi memmapDave Young1-3/+2
Chun-Yi reported a kernel warning message below: WARNING: CPU: 0 PID: 0 at ../mm/early_ioremap.c:182 early_iounmap+0x4f/0x12c() early_iounmap(ffffffffff200180, 00000118) [0] size not consistent 00000120 The problem is x86 kexec_file_load adds extra alignment to the efi memmap: in bzImage64_load(): efi_map_sz = efi_get_runtime_map_size(); efi_map_sz = ALIGN(efi_map_sz, 16); And __efi_memmap_init maps with the size including the alignment bytes but efi_memmap_unmap use nr_maps * desc_size which does not include the extra bytes. The alignment in kexec code is only needed for the kexec buffer internal use Actually kexec should pass exact size of the efi memmap to 2nd kernel. Link: http://lkml.kernel.org/r/20180417083600.GA1972@dhcp-128-65.nay.redhat.com Signed-off-by: Dave Young <dyoung@redhat.com> Reported-by: joeyli <jlee@suse.com> Tested-by: Randy Wright <rwright@hpe.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-04-20proc: fix /proc/loadavg regressionAlexey Dobriyan1-1/+1
Commit 95846ecf9dac ("pid: replace pid bitmap implementation with IDR API") changed last field of /proc/loadavg (last pid allocated) to be off by one: # unshare -p -f --mount-proc cat /proc/loadavg 0.00 0.00 0.00 1/60 2 <=== It should be 1 after first fork into pid namespace. This is formally a regression but given how useless this field is I don't think anyone is affected. Bug was found by /proc testsuite! Link: http://lkml.kernel.org/r/20180413175408.GA27246@avx2 Fixes: 95846ecf9dac508 ("pid: replace pid bitmap implementation with IDR API") Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Gargi Sharma <gs051095@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-04-20Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs fixes from Al Viro: "Assorted fixes. Some of that is only a matter with fault injection (broken handling of small allocation failure in various mount-related places), but the last one is a root-triggerable stack overflow, and combined with userns it gets really nasty ;-/" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: Don't leak MNT_INTERNAL away from internal mounts mm,vmscan: Allow preallocating memory for register_shrinker(). rpc_pipefs: fix double-dput() orangefs_kill_sb(): deal with allocation failures jffs2_kill_sb(): deal with failed allocations hypfs_kill_super(): deal with failed allocations
2018-04-20Merge tag 'mips_fixes_4.17_1' of ↵Linus Torvalds4-6/+26
git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips Pull MIPS fixes from James Hogan: - io: Add barriers to read*() & write*() - dts: Fix boston PCI bus DTC warnings (4.17) - memset: Several corner case fixes (one 3.10, others longer) * tag 'mips_fixes_4.17_1' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips: MIPS: uaccess: Add micromips clobbers to bzero invocation MIPS: memset.S: Fix clobber of v1 in last_fixup MIPS: memset.S: Fix return of __clear_user from Lpartial_fixup MIPS: memset.S: EVA & fault support for small_memset MIPS: dts: Boston: Fix PCI bus dtc warnings: MIPS: io: Add barrier after register read in readX() MIPS: io: Prevent compiler reordering writeX()
2018-04-20Merge tag 'powerpc-4.17-3' of ↵Linus Torvalds5-4/+20
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: - Fix an off-by-one bug in our alternative asm patching which leads to incorrectly patched code. This bug lay dormant for nearly 10 years but we finally hit it due to a recent change. - Fix lockups when running KVM guests on Power8 due to a missing check when a thread that's running KVM comes out of idle. - Fix an out-of-spec behaviour in the XIVE code (P9 interrupt controller). - Fix EEH handling of bridge MMIO windows. - Prevent crashes in our RFI fallback flush handler if firmware didn't tell us the size of the L1 cache (only seen on simulators). Thanks to: Benjamin Herrenschmidt, Madhavan Srinivasan, Michael Neuling. * tag 'powerpc-4.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/kvm: Fix lockups when running KVM guests on Power8 powerpc/eeh: Fix enabling bridge MMIO windows powerpc/xive: Fix trying to "push" an already active pool VP powerpc/64s: Default l1d_size to 64K in RFI fallback flush powerpc/lib: Fix off-by-one in alternate feature patching
2018-04-20Merge branch 'for-linus' of ↵Linus Torvalds26-712/+996
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 fixes and kexec-file-load from Martin Schwidefsky: "After the common code kexec patches went in via Andrew we can now push the architecture parts to implement the kexec-file-load system call. Plus a few more bug fixes and cleanups, this includes an update to the default configurations" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/signal: cleanup uapi struct sigaction s390: rename default_defconfig to debug_defconfig s390: remove gcov defconfig s390: update defconfig s390: add support for IBM z14 Model ZR1 s390: remove couple of duplicate includes s390/boot: remove unused COMPILE_VERSION and ccflags-y s390/nospec: include cpu.h s390/decompressor: Ignore file vmlinux.bin.full s390/kexec_file: add generated files to .gitignore s390/Kconfig: Move kexec config options to "Processor type and features" s390/kexec_file: Add ELF loader s390/kexec_file: Add crash support to image loader s390/kexec_file: Add image loader s390/kexec_file: Add kexec_file_load system call s390/kexec_file: Add purgatory s390/kexec_file: Prepare setup.h for kexec_file_load s390/smsgiucv: disable SMSG on module unload s390/sclp: avoid potential usage of uninitialized value
2018-04-19powerpc/kvm: Fix lockups when running KVM guests on Power8Michael Ellerman1-2/+2
When running KVM guests on Power8 we can see a lockup where one CPU stops responding. This often leads to a message such as: watchdog: CPU 136 detected hard LOCKUP on other CPUs 72 Task dump for CPU 72: qemu-system-ppc R running task 10560 20917 20908 0x00040004 And then backtraces on other CPUs, such as: Task dump for CPU 48: ksmd R running task 10032 1519 2 0x00000804 Call Trace: ... --- interrupt: 901 at smp_call_function_many+0x3c8/0x460 LR = smp_call_function_many+0x37c/0x460 pmdp_invalidate+0x100/0x1b0 __split_huge_pmd+0x52c/0xdb0 try_to_unmap_one+0x764/0x8b0 rmap_walk_anon+0x15c/0x370 try_to_unmap+0xb4/0x170 split_huge_page_to_list+0x148/0xa30 try_to_merge_one_page+0xc8/0x990 try_to_merge_with_ksm_page+0x74/0xf0 ksm_scan_thread+0x10ec/0x1ac0 kthread+0x160/0x1a0 ret_from_kernel_thread+0x5c/0x78 This is caused by commit 8c1c7fb0b5ec ("powerpc/64s/idle: avoid sync for KVM state when waking from idle"), which added a check in pnv_powersave_wakeup() to see if the kvm_hstate.hwthread_state is already set to KVM_HWTHREAD_IN_KERNEL, and if so to skip the store and test of kvm_hstate.hwthread_req. The problem is that the primary does not set KVM_HWTHREAD_IN_KVM when entering the guest, so it can then come out to cede with KVM_HWTHREAD_IN_KERNEL set. It can then go idle in kvm_do_nap after setting hwthread_req to 1, but because hwthread_state is still KVM_HWTHREAD_IN_KERNEL we will skip the test of hwthread_req when we wake up from idle and won't go to kvm_start_guest. From there the thread will return somewhere garbage and crash. Fix it by skipping the store of hwthread_state, but not the test of hwthread_req, when coming out of idle. It's OK to skip the sync in that case because hwthread_req will have been set on the same thread, so there is no synchronisation required. Fixes: 8c1c7fb0b5ec ("powerpc/64s/idle: avoid sync for KVM state when waking from idle") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-04-19powerpc/eeh: Fix enabling bridge MMIO windowsMichael Neuling1-1/+2
On boot we save the configuration space of PCIe bridges. We do this so when we get an EEH event and everything gets reset that we can restore them. Unfortunately we save this state before we've enabled the MMIO space on the bridges. Hence if we have to reset the bridge when we come back MMIO is not enabled and we end up taking an PE freeze when the driver starts accessing again. This patch forces the memory/MMIO and bus mastering on when restoring bridges on EEH. Ideally we'd do this correctly by saving the configuration space writes later, but that will have to come later in a larger EEH rewrite. For now we have this simple fix. The original bug can be triggered on a boston machine by doing: echo 0x8000000000000000 > /sys/kernel/debug/powerpc/PCI0001/err_injct_outbound On boston, this PHB has a PCIe switch on it. Without this patch, you'll see two EEH events, 1 expected and 1 the failure we are fixing here. The second EEH event causes the anything under the PHB to disappear (i.e. the i40e eth). With this patch, only 1 EEH event occurs and devices properly recover. Fixes: 652defed4875 ("powerpc/eeh: Check PCIe link after reset") Cc: stable@vger.kernel.org # v3.11+ Reported-by: Pridhiviraj Paidipeddi <ppaidipe@linux.vnet.ibm.com> Signed-off-by: Michael Neuling <mikey@neuling.org> Acked-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-04-18MIPS: uaccess: Add micromips clobbers to bzero invocationMatt Redfearn1-2/+9
The micromips implementation of bzero additionally clobbers registers t7 & t8. Specify this in the clobbers list when invoking bzero. Fixes: 26c5e07d1478 ("MIPS: microMIPS: Optimise 'memset' core library function.") Reported-by: James Hogan <jhogan@kernel.org> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: <stable@vger.kernel.org> # 3.10+ Patchwork: https://patchwork.linux-mips.org/patch/19110/ Signed-off-by: James Hogan <jhogan@kernel.org>
2018-04-18MIPS: memset.S: Fix clobber of v1 in last_fixupMatt Redfearn1-1/+1
The label .Llast_fixup\@ is jumped to on page fault within the final byte set loop of memset (on < MIPSR6 architectures). For some reason, in this fault handler, the v1 register is randomly set to a2 & STORMASK. This clobbers v1 for the calling function. This can be observed with the following test code: static int __init __attribute__((optimize("O0"))) test_clear_user(void) { register int t asm("v1"); char *test; int j, k; pr_info("\n\n\nTesting clear_user\n"); test = vmalloc(PAGE_SIZE); for (j = 256; j < 512; j++) { t = 0xa5a5a5a5; if ((k = clear_user(test + PAGE_SIZE - 256, j)) != j - 256) { pr_err("clear_user (%px %d) returned %d\n", test + PAGE_SIZE - 256, j, k); } if (t != 0xa5a5a5a5) { pr_err("v1 was clobbered to 0x%x!\n", t); } } return 0; } late_initcall(test_clear_user); Which demonstrates that v1 is indeed clobbered (MIPS64): Testing clear_user v1 was clobbered to 0x1! v1 was clobbered to 0x2! v1 was clobbered to 0x3! v1 was clobbered to 0x4! v1 was clobbered to 0x5! v1 was clobbered to 0x6! v1 was clobbered to 0x7! Since the number of bytes that could not be set is already contained in a2, the andi placing a value in v1 is not necessary and actively harmful in clobbering v1. Reported-by: James Hogan <jhogan@kernel.org> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/19109/ Signed-off-by: James Hogan <jhogan@kernel.org>
2018-04-19powerpc/xive: Fix trying to "push" an already active pool VPBenjamin Herrenschmidt1-0/+4
When setting up a CPU, we "push" (activate) a pool VP for it. However it's an error to do so if it already has an active pool VP. This happens when doing soft CPU hotplug on powernv since we don't tear down the CPU on unplug. The HW flags the error which gets captured by the diagnostics. Fix this by making sure to "pull" out any already active pool first. Fixes: 243e25112d06 ("powerpc/xive: Native exploitation of the XIVE interrupt controller") Cc: stable@vger.kernel.org # v4.12+ Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-04-17MIPS: memset.S: Fix return of __clear_user from Lpartial_fixupMatt Redfearn1-1/+1
The __clear_user function is defined to return the number of bytes that could not be cleared. From the underlying memset / bzero implementation this means setting register a2 to that number on return. Currently if a page fault is triggered within the memset_partial block, the value loaded into a2 on return is meaningless. The label .Lpartial_fixup\@ is jumped to on page fault. In order to work out how many bytes failed to copy, the exception handler should find how many bytes left in the partial block (andi a2, STORMASK), add that to the partial block end address (a2), and subtract the faulting address to get the remainder. Currently it incorrectly subtracts the partial block start address (t1), which has additionally been clobbered to generate a jump target in memset_partial. Fix this by adding the block end address instead. This issue was found with the following test code: int j, k; for (j = 0; j < 512; j++) { if ((k = clear_user(NULL, j)) != j) { pr_err("clear_user (NULL %d) returned %d\n", j, k); } } Which now passes on Creator Ci40 (MIPS32) and Cavium Octeon II (MIPS64). Suggested-by: James Hogan <jhogan@kernel.org> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/19108/ Signed-off-by: James Hogan <jhogan@kernel.org>
2018-04-17powerpc/64s: Default l1d_size to 64K in RFI fallback flushMadhavan Srinivasan1-0/+11
If there is no d-cache-size property in the device tree, l1d_size could be zero. We don't actually expect that to happen, it's only been seen on mambo (simulator) in some configurations. A zero-size l1d_size leads to the loop in the asm wrapping around to 2^64-1, and then walking off the end of the fallback area and eventually causing a page fault which is fatal. Just default to 64K which is correct on some CPUs, and sane enough to not cause a crash on others. Fixes: aa8a5e0062ac9 ('powerpc/64s: Add support for RFI flush of L1-D cache') Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> [mpe: Rewrite comment and change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-04-17s390/signal: cleanup uapi struct sigactionMartin Schwidefsky1-7/+16
The struct sigaction for user space in arch/s390/include/uapi/asm/signal.h is ill defined. The kernel uses two structures 'struct sigaction' and 'struct old_sigaction', the correlation in the kernel for both 31 and 64 bit is as follows sys_sigaction -> struct old_sigaction sys_rt_sigaction -> struct sigaction The correlation of the (single) uapi definition for 'struct sigaction' under '#ifndef __KERNEL__': 31-bit: sys_sigaction -> uapi struct sigaction 31-bit: sys_rt_sigaction -> no structure available 64-bit: sys_sigaction -> no structure available 64-bit: sys_rt_sigaction -> uapi struct sigaction This is quite confusing. To make it a bit less confusing make the uapi definition of 'struct sigaction' usable for sys_rt_sigaction for both 31-bit and 64-bit. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16Merge branch 'parisc-4.17-3' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc build fix from Helge Deller: "Fix build error because of missing binfmt_elf32.o file which is still mentioned in the Makefile" * 'parisc-4.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Fix missing binfmt_elf32.o build error
2018-04-16MIPS: memset.S: EVA & fault support for small_memsetMatt Redfearn1-1/+6
The MIPS kernel memset / bzero implementation includes a small_memset branch which is used when the region to be set is smaller than a long (4 bytes on 32bit, 8 bytes on 64bit). The current small_memset implementation uses a simple store byte loop to write the destination. There are 2 issues with this implementation: 1. When EVA mode is active, user and kernel address spaces may overlap. Currently the use of the sb instruction means kernel mode addressing is always used and an intended write to userspace may actually overwrite some critical kernel data. 2. If the write triggers a page fault, for example by calling __clear_user(NULL, 2), instead of gracefully handling the fault, an OOPS is triggered. Fix these issues by replacing the sb instruction with the EX() macro, which will emit EVA compatible instuctions as required. Additionally implement a fault fixup for small_memset which sets a2 to the number of bytes that could not be cleared (as defined by __clear_user). Reported-by: Chuanhua Lei <chuanhua.lei@intel.com> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/18975/ Signed-off-by: James Hogan <jhogan@kernel.org>
2018-04-16Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds4-56/+86
Pull kvm fixes from Paolo Bonzini: "Bug fixes, plus a new test case and the associated infrastructure for writing nested virtualization tests" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: kvm: selftests: add vmx_tsc_adjust_test kvm: x86: move MSR_IA32_TSC handling to x86.c X86/KVM: Properly update 'tsc_offset' to represent the running guest kvm: selftests: add -std=gnu99 cflags x86: Add check for APIC access address for vmentry of L2 guests KVM: X86: fix incorrect reference of trace_kvm_pi_irte_update X86/KVM: Do not allow DISABLE_EXITS_MWAIT when LAPIC ARAT is not available kvm: selftests: fix spelling mistake: "divisable" and "divisible" X86/VMX: Disable VMX preemption timer if MWAIT is not intercepted
2018-04-16x86/ldt: Fix support_pte_mask filtering in map_ldt_struct()Joerg Roedel1-1/+1
The |= operator will let us end up with an invalid PTE. Use the correct &= instead. [ The bug was also independently reported by Shuah Khan ] Fixes: fb43d6cb91ef ('x86/mm: Do not auto-massage page protections') Acked-by: Andy Lutomirski <luto@kernel.org> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-04-16kvm: x86: move MSR_IA32_TSC handling to x86.cPaolo Bonzini3-29/+6
This is not specific to Intel/AMD anymore. The TSC offset is available in vcpu->arch.tsc_offset. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-04-16X86/KVM: Properly update 'tsc_offset' to represent the running guestKarimAllah Ahmed4-22/+56
Update 'tsc_offset' on vmentry/vmexit of L2 guests to ensure that it always captures the TSC_OFFSET of the running guest whether it is the L1 or L2 guest. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Jim Mattson <jmattson@google.com> Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: KarimAllah Ahmed <karahmed@amazon.de> [AMD changes, fix update_ia32_tsc_adjust_msr. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-04-17powerpc/lib: Fix off-by-one in alternate feature patchingMichael Ellerman1-1/+1
When we patch an alternate feature section, we have to adjust any relative branches that branch out of the alternate section. But currently we have a bug if we have a branch that points to past the last instruction of the alternate section, eg: FTR_SECTION_ELSE 1: b 2f or 6,6,6 2: ALT_FTR_SECTION_END(...) nop This will result in a relative branch at 1 with a target that equals the end of the alternate section. That branch does not need adjusting when it's moved to the non-else location. Currently we do adjust it, resulting in a branch that goes off into the link-time location of the else section, which is junk. The fix is to not patch branches that have a target == end of the alternate section. Fixes: d20fe50a7b3c ("KVM: PPC: Book3S HV: Branch inside feature section") Fixes: 9b1a735de64c ("powerpc: Add logic to patch alternative feature sections") Cc: stable@vger.kernel.org # v2.6.27+ Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-04-16MIPS: dts: Boston: Fix PCI bus dtc warnings:Matt Redfearn1-0/+6
dtc recently (v1.4.4-8-g756ffc4f52f6) added PCI bus checks. Fix the warnings now emitted: arch/mips/boot/dts/img/boston.dtb: Warning (pci_bridge): /pci@10000000: missing bus-range for PCI bridge arch/mips/boot/dts/img/boston.dtb: Warning (pci_bridge): /pci@12000000: missing bus-range for PCI bridge arch/mips/boot/dts/img/boston.dtb: Warning (pci_bridge): /pci@14000000: missing bus-range for PCI bridge Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/19070/ Signed-off-by: James Hogan <jhogan@kernel.org>
2018-04-16s390: rename default_defconfig to debug_defconfigHeiko Carstens1-0/+0
The name debug_defconfig reflects what the config is actually good for and should be less confusing. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390: remove gcov defconfigHeiko Carstens1-661/+0
This config is not needed anymore. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390: update defconfigMartin Schwidefsky3-18/+46
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390: add support for IBM z14 Model ZR1Heiko Carstens3-4/+6
Just add the new machine type number to the two places that matter. Cc: <stable@vger.kernel.org> # v4.14+ Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390/boot: remove unused COMPILE_VERSION and ccflags-yVasily Gorbik1-6/+0
ccflags-y has no effect (no code is built in that directory, arch/s390/boot/compressed/Makefile defines its own KBUILD_CFLAGS). Removing ccflags-y together with COMPILE_VERSION. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390/nospec: include cpu.hSebastian Ott1-0/+1
Fix the following sparse warnings: symbol 'cpu_show_spectre_v1' was not declared. Should it be static? symbol 'cpu_show_spectre_v2' was not declared. Should it be static? Signed-off-by: Sebastian Ott <sebott@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390/decompressor: Ignore file vmlinux.bin.fullThomas Richter1-0/+1
Commit 81796a3c6a4a ("s390/decompressor: trim uncompressed image head during the build") introduced a new file named vmlinux.bin.full in directory arch/s390/boot/compressed. Add this file to the list of ignored files so it does not show up on git status. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390/kexec_file: add generated files to .gitignoreHeiko Carstens1-0/+2
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390/Kconfig: Move kexec config options to "Processor type and features"Philipp Rudo1-21/+20
The config options for kexec are currently not under any menu directory. Up until now this was not a problem as standard kexec is always compiled in and thus does not create a menu entry. This changed when kexec_file_load was enabled. Its config option requires a menu entry which, when added beneath standard kexec option, appears on the main directory above "General Setup". Thus move the whole block further down such that the entry in now in "Processor type and features". While at it also update the help text for kexec file. Signed-off-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390/kexec_file: Add ELF loaderPhilipp Rudo4-0/+150
Add an ELF loader for kexec_file. The main task here is to do proper sanity checks on the ELF file. Basically all other functionality was already implemented for the image loader. Signed-off-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390/kexec_file: Add crash support to image loaderPhilipp Rudo4-6/+234
Add support to load a crash kernel to the image loader. This requires extending the purgatory. Signed-off-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390/kexec_file: Add image loaderPhilipp Rudo4-1/+176
Add an image loader for kexec_file_load. For simplicity first skip crash support. The functions defined in machine_kexec_file will later be shared with the ELF loader. Signed-off-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390/kexec_file: Add kexec_file_load system callPhilipp Rudo6-0/+144
This patch adds the kexec_file_load system call to s390 as well as the arch specific functions common code requires to work. Loaders for the different file types will be added later. Signed-off-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390/kexec_file: Add purgatoryPhilipp Rudo7-0/+198
The common code expects the architecture to have a purgatory that runs between the two kernels. Add it now. For simplicity first skip crash support. Signed-off-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-16s390/kexec_file: Prepare setup.h for kexec_file_loadPhilipp Rudo1-13/+27
kexec_file_load needs to prepare the new kernels before they are loaded. For that it has to know the offsets in head.S, e.g. to register the new command line. Unfortunately there are no macros right now defining those offsets. Define them now. Signed-off-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-15hypfs_kill_super(): deal with failed allocationsAl Viro1-1/+1
hypfs_fill_super() might fail to allocate sbi; hypfs_kill_super() should not oops on that. Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-04-15Merge tag 'kbuild-v4.17-2' of ↵Linus Torvalds5-10/+4
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull more Kbuild updates from Masahiro Yamada: - pass HOSTLDFLAGS when compiling single .c host programs - build genksyms lexer and parser files instead of using shipped versions - rename *-asn1.[ch] to *.asn1.[ch] for suffix consistency - let the top .gitignore globally ignore artifacts generated by flex, bison, and asn1_compiler - let the top Makefile globally clean artifacts generated by flex, bison, and asn1_compiler - use safer .SECONDARY marker instead of .PRECIOUS to prevent intermediate files from being removed - support -fmacro-prefix-map option to make __FILE__ a relative path - fix # escaping to prepare for the future GNU Make release - clean up deb-pkg by using debian tools instead of handrolled source/changes generation - improve rpm-pkg portability by supporting kernel-install as a fallback of new-kernel-pkg - extend Kconfig listnewconfig target to provide more information * tag 'kbuild-v4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kconfig: extend output of 'listnewconfig' kbuild: rpm-pkg: use kernel-install as a fallback for new-kernel-pkg Kbuild: fix # escaping in .cmd files for future Make kbuild: deb-pkg: split generating packaging and build kbuild: use -fmacro-prefix-map to make __FILE__ a relative path kbuild: mark $(targets) as .SECONDARY and remove .PRECIOUS markers kbuild: rename *-asn1.[ch] to *.asn1.[ch] kbuild: clean up *-asn1.[ch] patterns from top-level Makefile .gitignore: move *-asn1.[ch] patterns to the top-level .gitignore kbuild: add %.dtb.S and %.dtb to 'targets' automatically kbuild: add %.lex.c and %.tab.[ch] to 'targets' automatically genksyms: generate lexer and parser during build instead of shipping kbuild: clean up *.lex.c and *.tab.[ch] patterns from top-level Makefile .gitignore: move *.lex.c *.tab.[ch] patterns to the top-level .gitignore kbuild: use HOSTLDFLAGS for single .c executables
2018-04-15Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds24-777/+1040
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "A set of fixes and updates for x86: - Address a swiotlb regression which was caused by the recent DMA rework and made driver fail because dma_direct_supported() returned false - Fix a signedness bug in the APIC ID validation which caused invalid APIC IDs to be detected as valid thereby bloating the CPU possible space. - Fix inconsisten config dependcy/select magic for the MFD_CS5535 driver. - Fix a corruption of the physical address space bits when encryption has reduced the address space and late cpuinfo updates overwrite the reduced bit information with the original value. - Dominiks syscall rework which consolidates the architecture specific syscall functions so all syscalls can be wrapped with the same macros. This allows to switch x86/64 to struct pt_regs based syscalls. Extend the clearing of user space controlled registers in the entry patch to the lower registers" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/apic: Fix signedness bug in APIC ID validity checks x86/cpu: Prevent cpuinfo_x86::x86_phys_bits adjustment corruption x86/olpc: Fix inconsistent MFD_CS5535 configuration swiotlb: Use dma_direct_supported() for swiotlb_ops syscalls/x86: Adapt syscall_wrapper.h to the new syscall stub naming convention syscalls/core, syscalls/x86: Rename struct pt_regs-based sys_*() to __x64_sys_*() syscalls/core, syscalls/x86: Clean up compat syscall stub naming convention syscalls/core, syscalls/x86: Clean up syscall stub naming convention syscalls/x86: Extend register clearing on syscall entry to lower registers syscalls/x86: Unconditionally enable 'struct pt_regs' based syscalls on x86_64 syscalls/x86: Use 'struct pt_regs' based syscall calling for IA32_EMULATION and x32 syscalls/core: Prepare CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y for compat syscalls syscalls/x86: Use 'struct pt_regs' based syscall calling convention for 64-bit syscalls syscalls/core: Introduce CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y x86/syscalls: Don't pointlessly reload the system call number x86/mm: Fix documentation of module mapping range with 4-level paging x86/cpuid: Switch to 'static const' specifier
2018-04-15Merge branch 'x86-pti-for-linus' of ↵Linus Torvalds22-105/+329
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 pti updates from Thomas Gleixner: "Another series of PTI related changes: - Remove the manual stack switch for user entries from the idtentry code. This debloats entry by 5k+ bytes of text. - Use the proper types for the asm/bootparam.h defines to prevent user space compile errors. - Use PAGE_GLOBAL for !PCID systems to gain back performance - Prevent setting of huge PUD/PMD entries when the entries are not leaf entries otherwise the entries to which the PUD/PMD points to and are populated get lost" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/pgtable: Don't set huge PUD/PMD on non-leaf entries x86/pti: Leave kernel text global for !PCID x86/pti: Never implicitly clear _PAGE_GLOBAL for kernel image x86/pti: Enable global pages for shared areas x86/mm: Do not forbid _PAGE_RW before init for __ro_after_init x86/mm: Comment _PAGE_GLOBAL mystery x86/mm: Remove extra filtering in pageattr code x86/mm: Do not auto-massage page protections x86/espfix: Document use of _PAGE_GLOBAL x86/mm: Introduce "default" kernel PTE mask x86/mm: Undo double _PAGE_PSE clearing x86/mm: Factor out pageattr _PAGE_GLOBAL setting x86/entry/64: Drop idtentry's manual stack switch for user entries x86/uapi: Fix asm/bootparam.h userspace compilation errors
2018-04-15Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds1-10/+24
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull more perf updates from Thomas Gleixner: "A rather large set of perf updates: Kernel: - Fix various initialization issues - Prevent creating [ku]probes for not CAP_SYS_ADMIN users Tooling: - Show only failing syscalls with 'perf trace --failure' (Arnaldo Carvalho de Melo) e.g: See what 'openat' syscalls are failing: # perf trace --failure -e openat 762.323 ( 0.007 ms): VideoCapture/4566 openat(dfd: CWD, filename: /dev/video2) = -1 ENOENT No such file or directory <SNIP N /dev/videoN open attempts... sigh, where is that improvised camera lid?!? > 790.228 ( 0.008 ms): VideoCapture/4566 openat(dfd: CWD, filename: /dev/video63) = -1 ENOENT No such file or directory ^C# - Show information about the event (freq, nr_samples, total period/nr_events) in the annotate --tui and --stdio2 'perf annotate' output, similar to the first line in the 'perf report --tui', but just for the samples for a the annotated symbol (Arnaldo Carvalho de Melo) - Introduce 'perf version --build-options' to show what features were linked, aliased as well as a shorter 'perf -vv' (Jin Yao) - Add a "dso_size" sort order (Kim Phillips) - Remove redundant ')' in the tracepoint output in 'perf trace' (Changbin Du) - Synchronize x86's cpufeatures.h, no effect on toolss (Arnaldo Carvalho de Melo) - Show group details on the title line in the annotate browser and 'perf annotate --stdio2' output, so that the per-event columns can have headers (Arnaldo Carvalho de Melo) - Fixup vertical line separating metrics from instructions and cleaning unused lines at the bottom, both in the annotate TUI browser (Arnaldo Carvalho de Melo) - Remove duplicated 'samples' in lost samples warning in 'perf report' (Arnaldo Carvalho de Melo) - Synchronize i915_drm.h, silencing the perf build process, automagically adding support for the new DRM_I915_QUERY ioctl (Arnaldo Carvalho de Melo) - Make auxtrace_queues__add_buffer() allocate struct buffer, from a patchkit already applied (Adrian Hunter) - Fix the --stdio2/TUI annotate output to include group details, be it for a recorded '{a,b,f}' explicit event group or when forcing group display using 'perf report --group' for a set of events not recorded as a group (Arnaldo Carvalho de Melo) - Fix display artifacts in the ui browser (base class for the annotate and main report/top TUI browser) related to the extra title lines work (Arnaldo Carvalho de Melo) - perf auxtrace refactorings, leftovers from a previously partially processed patchset (Adrian Hunter) - Fix the builtin clang build (Sandipan Das, Arnaldo Carvalho de Melo) - Synchronize i915_drm.h, silencing a perf build warning and in the process automagically adding support for a new ioctl command (Arnaldo Carvalho de Melo) - Fix a strncpy issue in uprobe tracing" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits) perf/core: Need CAP_SYS_ADMIN to create k/uprobe with perf_event_open() tracing/uprobe_event: Fix strncpy corner case perf/core: Fix perf_uprobe_init() perf/core: Fix perf_kprobe_init() perf/core: Fix use-after-free in uprobe_perf_close() perf tests clang: Fix function name for clang IR test perf clang: Add support for recent clang versions perf tools: Fix perf builds with clang support perf tools: No need to include namespaces.h in util.h perf hists browser: Remove leftover from row returned from refresh perf hists browser: Show extra_title_lines in the 'D' debug hotkey perf auxtrace: Make auxtrace_queues__add_buffer() do CPU filtering tools headers uapi: Synchronize i915_drm.h perf report: Remove duplicated 'samples' in lost samples warning perf ui browser: Fixup cleaning unused lines at the bottom perf annotate browser: Fixup vertical line separating metrics from instructions perf annotate: Show group details on the title line perf auxtrace: Make auxtrace_queues__add_buffer() allocate struct buffer perf/x86/intel: Move regs->flags EXACT bit init perf trace: Remove redundant ')' ...
2018-04-15Merge branch 'efi-urgent-for-linus' of ↵Linus Torvalds1-1/+6
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 EFI bootup fixlet from Thomas Gleixner: "A single fix for an early boot warning caused by invoking this_cpu_has() before SMP initialization" * 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm: Fix bogus warning during EFI bootup, use boot_cpu_has() instead of this_cpu_has() in build_cr3_noflush()
2018-04-15Merge tag 'for-linus' of git://github.com/openrisc/linuxLinus Torvalds1-2/+0
Pull OpenRISC fixlet from Stafford Horne: "Just one small thing here, it came in a while back but I didnt have anything in my 4.16 queue, still its the only thing for 4.17 so sending it alone. Small cleanup: remove unused __ARCH_HAVE_MMU define" * tag 'for-linus' of git://github.com/openrisc/linux: openrisc: remove unused __ARCH_HAVE_MMU define
2018-04-15Merge tag 'powerpc-4.17-2' of ↵Linus Torvalds10-40/+63
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: - Fix crashes when loading modules built with a different CONFIG_RELOCATABLE value by adding CONFIG_RELOCATABLE to vermagic. - Fix busy loops in the OPAL NVRAM driver if we get certain error conditions from firmware. - Remove tlbie trace points from KVM code that's called in real mode, because it causes crashes. - Fix checkstops caused by invalid tlbiel on Power9 Radix. - Ensure the set of CPU features we "know" are always enabled is actually the minimal set when we build with support for firmware supplied CPU features. Thanks to: Aneesh Kumar K.V, Anshuman Khandual, Nicholas Piggin. * tag 'powerpc-4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/64s: Fix CPU_FTRS_ALWAYS vs DT CPU features powerpc/mm/radix: Fix checkstops caused by invalid tlbiel KVM: PPC: Book3S HV: trace_tlbie must not be called in realmode powerpc/8xx: Fix build with hugetlbfs enabled powerpc/powernv: Fix OPAL NVRAM driver OPAL_BUSY loops powerpc/powernv: define a standard delay for OPAL_BUSY type retry loops powerpc/fscr: Enable interrupts earlier before calling get_user() powerpc/64s: Fix section mismatch warnings from setup_rfi_flush() powerpc/modules: Fix crashes by adding CONFIG_RELOCATABLE to vermagic
2018-04-14Merge branch 'akpm' (patches from Andrew)Linus Torvalds18-708/+138
Merge yet more updates from Andrew Morton: - various hotfixes - kexec_file updates and feature work * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (27 commits) kernel/kexec_file.c: move purgatories sha256 to common code kernel/kexec_file.c: allow archs to set purgatory load address kernel/kexec_file.c: remove mis-use of sh_offset field during purgatory load kernel/kexec_file.c: remove unneeded variables in kexec_purgatory_setup_sechdrs kernel/kexec_file.c: remove unneeded for-loop in kexec_purgatory_setup_sechdrs kernel/kexec_file.c: split up __kexec_load_puragory kernel/kexec_file.c: use read-only sections in arch_kexec_apply_relocations* kernel/kexec_file.c: search symbols in read-only kexec_purgatory kernel/kexec_file.c: make purgatory_info->ehdr const kernel/kexec_file.c: remove checks in kexec_purgatory_load include/linux/kexec.h: silence compile warnings kexec_file, x86: move re-factored code to generic side x86: kexec_file: clean up prepare_elf64_headers() x86: kexec_file: lift CRASH_MAX_RANGES limit on crash_mem buffer x86: kexec_file: remove X86_64 dependency from prepare_elf64_headers() x86: kexec_file: purge system-ram walking from prepare_elf64_headers() kexec_file,x86,powerpc: factor out kexec_file_ops functions kexec_file: make use of purgatory optional proc: revalidate misc dentries mm, slab: reschedule cache_reap() on the same CPU ...
2018-04-14parisc: Fix missing binfmt_elf32.o build errorHelge Deller1-1/+1
Commit 71d577db01a5 ("parisc: Switch to generic COMPAT_BINFMT_ELF") removed the binfmt_elf32.c source file, but missed to drop the object file from the list of object files the Makefile, which then results in a build error. Fixes: 71d577db01a5 ("parisc: Switch to generic COMPAT_BINFMT_ELF") Reported-by: Guenter Roeck <linux@roeck-us.net> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Helge Deller <deller@gmx.de>
2018-04-13kernel/kexec_file.c: move purgatories sha256 to common codePhilipp Rudo5-305/+16
The code to verify the new kernels sha digest is applicable for all architectures. Move it to common code. One problem is the string.c implementation on x86. Currently sha256 includes x86/boot/string.h which defines memcpy and memset to be gcc builtins. By moving the sha256 implementation to common code and changing the include to linux/string.h both functions are no longer defined. Thus definitions have to be provided in x86/purgatory/string.c Link: http://lkml.kernel.org/r/20180321112751.22196-12-prudo@linux.vnet.ibm.com Signed-off-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Acked-by: Dave Young <dyoung@redhat.com> Cc: AKASHI Takahiro <takahiro.akashi@linaro.org> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Thiago Jung Bauermann <bauerman@linux.vnet.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>
2018-04-13kernel/kexec_file.c: allow archs to set purgatory load addressPhilipp Rudo2-8/+9
For s390 new kernels are loaded to fixed addresses in memory before they are booted. With the current code this is a problem as it assumes the kernel will be loaded to an 'arbitrary' address. In particular, kexec_locate_mem_hole searches for a large enough memory region and sets the load address (kexec_bufer->mem) to it. Luckily there is a simple workaround for this problem. By returning 1 in arch_kexec_walk_mem, kexec_locate_mem_hole is turned off. This allows the architecture to set kbuf->mem by hand. While the trick works fine for the kernel it does not for the purgatory as here the architectures don't have access to its kexec_buffer. Give architectures access to the purgatories kexec_buffer by changing kexec_load_purgatory to take a pointer to it. With this change architectures have access to the buffer and can edit it as they need. A nice side effect of this change is that we can get rid of the purgatory_info->purgatory_load_address field. As now the information stored there can directly be accessed from kbuf->mem. Link: http://lkml.kernel.org/r/20180321112751.22196-11-prudo@linux.vnet.ibm.com Signed-off-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Acked-by: Dave Young <dyoung@redhat.com> Cc: AKASHI Takahiro <takahiro.akashi@linaro.org> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Thiago Jung Bauermann <bauerman@linux.vnet.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>
2018-04-13kernel/kexec_file.c: remove mis-use of sh_offset field during purgatory loadPhilipp Rudo1-4/+6
The current code uses the sh_offset field in purgatory_info->sechdrs to store a pointer to the current load address of the section. Depending whether the section will be loaded or not this is either a pointer into purgatory_info->purgatory_buf or kexec_purgatory. This is not only a violation of the ELF standard but also makes the code very hard to understand as you cannot tell if the memory you are using is read-only or not. Remove this misuse and store the offset of the section in pugaroty_info->purgatory_buf in sh_offset. Link: http://lkml.kernel.org/r/20180321112751.22196-10-prudo@linux.vnet.ibm.com Signed-off-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Acked-by: Dave Young <dyoung@redhat.com> Cc: AKASHI Takahiro <takahiro.akashi@linaro.org> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Thiago Jung Bauermann <bauerman@linux.vnet.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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