- Feb 15, 2021
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David Hildenbrand authored
The existing code is essentially free_initmem_default()->free_reserved_area() without poisoning. Note that existing code missed to update the managed page count of the zone. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Oscar Salvador <osalvador@suse.de> Cc: Michal Hocko <mhocko@kernel.org> Cc: Wei Yang <richard.weiyang@linux.alibaba.com> Tested-by: Guo Ren <guoren@kernel.org> Signed-off-by: Guo Ren <guoren@kernel.org> Signed-off-by: David Hildenbrand <david@redhat.com>
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Guo Ren authored
The max_mapnr is the number of PFNs, not absolute PFN offset. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
Using set_max_mapnr API instead of setting the value directly. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
It could help to reduce the latency of the time-related functions in user space. We have referenced arm's and riscv's implementation for the patch. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Vincent Chen <vincent.chen@sifive.com> Cc: Arnd Bergmann <arnd@arndb.de>
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Guo Ren authored
The type of 'val' is 'unsigned long' in simulate_blz32, so 'val < 0' can't be true. Cast 'val' to 'long' here to determine branch token or not, Fixup instructions: bnezad32, bhsz32, bhz32, blsz32, blz32 Link: https://lore.kernel.org/linux-csky/CAJF2gTQjKXR9gpo06WAWG1aquiT87mATiMGorXs6ChxOxoe90Q@mail.gmail.com/T/#t Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Co-developed-by: Menglong Dong <dong.menglong@zte.com.cn> Signed-off-by: Menglong Dong <dong.menglong@zte.com.cn>
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Guo Ren authored
Current csky's swappon is broken by wrong swap PTE entry format. Now redesign the new format for abiv1 & abiv2 and make swappon + zram work properly on csky machines. C-SKY PTE has VALID, DIRTY to emulate PRESENT, READ, WRITE, EXEC attributes. GLOBAL bit is shared by two pages in the same tlb entry. So we need to keep GLOBAL, VALID, PRESENT zero in swp_pte. To distinguish PAGE_NONE and swp_pte, we need to use an additional bit (abiv1 is _PAGE_READ, abiv2 is _PAGE_WRITE). Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Arnd Bergmann <arnd@arndb.de>
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Guo Ren authored
Remove _PAGE_IOREMAP, __READABLE, __WRITEABLE, abi/pgtable-bits.h definition, they are no use at all. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Arnd Bergmann <arnd@arndb.de>
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Guo Ren authored
When the system memory is exhausted, linux will trigger kswapd to shrink memory page cache. We found the csky's .text file mapping pages would be reclaimed earlier than arm's elf. Because csky doesn't give _PAGE_ACCESSED for default pgprot and in zap_pte_range if (pte_young(ptent) && likely(!(vma->vm_flags & VM_SEQ_READ))) mark_page_accessed(page); mark_page_accessed will put the pages into active lru list. [ 3.652722] delete busybox page from inactive file list Call Trace: [<9012a376>] dump_stack+0xe/0x24 [<9012a370>] dump_stack+0x8/0x24 [<9005b780>] activate_page+0x2b4/0x2d4 [<90132502>] vsnprintf+0x2c6/0x374 [<9005b880>] mark_page_accessed+0xe0/0x150 [<9006903e>] unmap_page_range+0x166/0x33c [<90021844>] get_signal+0x98/0x3b4 [<90069232>] unmap_single_vma+0x1e/0x24 [<90069462>] unmap_vmas+0x26/0x40 [<9006d3d8>] exit_mmap+0x60/0xbc [<9006a140>] handle_mm_fault+0x700/0xcec [<900426b2>] ktime_get_with_offset+0x86/0x130 [<90017566>] mmput+0x2e/0x90 [<9001a30a>] do_exit+0x13e/0x6f0 [<90015448>] page_fault_end+0x14/0x74 [<9001b4bc>] SyS_exit_group+0x0/0xc [<9001b47c>] do_group_exit+0x2c/0x6c [<9001b4c8>] __wake_up_parent+0x0/0x20 [<9001399e>] csky_systemcall+0x6e/0x72 csky will throw the pages at first and keep them in active lru list later after real accessed, but arm would keep them in active lru list at the beginning. The following are statistics of different architecture styles: Default _PAGE_ACCESSED: alpha, arm, arm64, ia64, m68k, microblaze, openrisc, powerpc, riscv, sh, um, x86, xtensa Not def _PAGE_ACCESSED: arc, c6x, h8300, hexgon, mips, s390, nds32, nios2, parisc, sparc Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Co-developed-by: Xu Kai <xukai@nationalchip.com> Signed-off-by: Xu Kai <xukai@nationalchip.com>
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Tian Tao authored
Remove including <linux/version.h> that don't need it. Signed-off-by: Tian Tao <tiantao6@hisilicon.com> Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Zhenzhong Duan authored
"*" is missed in size determination as we are passing register set rather than a pointer. Fixes: dcad7854 ("sky: switch to ->regset_get()") Signed-off-by: Zhenzhong Duan <zhenzhong.duan@gmail.com> Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
Reconstruct vdso framework to support future vsyscall, vgettimeofday features. These are very important features to reduce system calls into the kernel for performance improvement. The patch is reference RISC-V's Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Palmer Dabbelt <palmerdabbelt@google.com>
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Guo Ren authored
Pick up the patch from the 'Link' made by Mark Rutland. Keep the same with x86, arm, arm64, arc, sh, power. Link: https://lore.kernel.org/linux-arm-kernel/1499782763-31418-1-git-send-email-mark.rutland@arm.com/ Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Mark Rutland <mark.rutland@arm.com>
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Guo Ren authored
Sync arch/riscv/mm/fault.c into arch/csky for easy maintenance. Here are the patches related to the modification: cac4d1dc "riscv/mm/fault: Move no context handling to no_context()" ac416a72 "riscv/mm/fault: Move vmalloc fault handling to vmalloc_fault()" 6c11ffbf "riscv/mm/fault: Move fault error handling to mm_fault_error()" afb8c6fe "riscv/mm/fault: Move access error check to function" bda281d5 "riscv/mm/fault: Simplify fault error handling" a51271d9 "riscv/mm/fault: Move bad area handling to bad_area()" Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Palmer Dabbelt <palmerdabbelt@google.com> Cc: Arnd Bergmann <arnd@arndb.de>
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Guo Ren authored
We must succeed parent's context irq status in page fault handler. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
Similar to other architectures: In addition to in_atomic, we also need pagefault_disabled() to check. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
The function update_mmu_cache could be called by user-io mapping. There is no space of struct page in mem_map for the pte. Just ignore the user-io mmaping in update_mmu_cache. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
The past code only passes the FAULT_FLAG_WRITE into handle_mm_fault and missing USER & DEFAULT & RETRY. The patch references to arch/riscv/mm/fault.c, but there is no FAULT_FLAG_INSTRUCTION in csky hw. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
Print all 1024 jtlb entries and 16 iutlb entries and 16 dutlb entries in show_regs. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
TLB invalidate didn't contain a barrier operation in csky cpu and we need to prevent previous PTW response after TLB invalidation instruction. Of cause, the ASID changing also needs to take care of the issue. CPU0 CPU1 =============== =============== set_pte sync_is() -> See the previous set_pte for all harts tlbi.vas -> Invalidate all harts TLB entry & flush pipeline Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
Here is the log after enabled: [ 1.798972] kmemleak: Kernel memory leak detector initialized (mem pool available: 15851) [ 1.798983] kmemleak: Automatic memory scanning thread started Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
There is a prologue on page fault handler which marking pages dirty and/or accessed in page attributes, but all of these have been handled in handle_pte_fault. - Add flush_tlb_one in vmalloc page fault instead of prologue. - Using cmxchg_fixup C codes in do_page_fault instead of ASM one. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
Fixup commit c2d1adfa9a24 "csky: Add memory layout 2.5G(user):1.5G (kernel)". That patch broke the global bit in PTE. C-SKY TLB's entry contain two pages: vpn, vpn + 1 -> ppn0, ppn1 All PPN's attributes contain global bit and final global is PPN0.G & PPN1.G. So we must keep PPN0.G and PPN1.G same in one TLB's entry. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
There are two implementation of spinlock in arch/csky: - simple one (NR_CPU = 1,2) - tick's one (NR_CPU = 3,4) Remove the simple one. There is already smp_mb in spinlock, so remove the definition of smp_mb__after_spinlock. Link: https://lore.kernel.org/linux-csky/20200807081253.GD2674@hirez.programming.kicks-ass.net/#t Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Peter Zijlstra <peterz@infradead.org>k Cc: Arnd Bergmann <arnd@arndb.de>
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Guo Ren authored
Optimize the performance of cmpxchg by using more fine-grained acquire/release barriers. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Paul E. McKenney <paulmck@kernel.org>
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Guo Ren authored
Arnd said: I would guess that for csky, this is a mistake, as the architecture is fairly new and should be able to implement it. Guo reply: The c610, c807, c810 don't support SMP, so futex_cmpxchg_enabled = 1 with asm-generic's implementation. For c860, there is no HAVE_FUTEX_CMPXCHG and cmpxchg_inatomic/inuser implementation, so futex_cmpxchg_enabled = 0. Thx for point it out, we'll implement cmpxchg_inatomic/inuser for C860 and still use asm-generic for non-smp CPUs. LTP test: futex_wait01 1 TPASS : futex_wait(): errno=ETIMEDOUT(110): Connection timed out futex_wait01 2 TPASS : futex_wait(): errno=EAGAIN/EWOULDBLOCK(11): Resource temporarily unavailable futex_wait01 3 TPASS : futex_wait(): errno=ETIMEDOUT(110): Connection timed out futex_wait01 4 TPASS : futex_wait(): errno=EAGAIN/EWOULDBLOCK(11): Resource temporarily unavailable futex_wait02 1 TPASS : futex_wait() woken up futex_wait03 1 TPASS : futex_wait() woken up futex_wait04 1 TPASS : futex_wait() returned -1: errno=EAGAIN/EWOULDBLOCK(11): Resource temporarily unavailable Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Arnd Bergmann <arnd@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul E. McKenney <paulmck@kernel.org> Link: https://lore.kernel.org/lkml/CAK8P3a3+WaQNyJ6Za2qfu6=0mBgU1hApnRXrdp1b1=P7wwyRUg@mail.gmail.com/
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Guo Ren authored
Remove shareable bit for ordering barrier, just keep ordering in current hart is enough for SMP. Using three continuous sync.is as PTW barrier to prevent speculative PTW in 860 microarchitecture. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
Use generic atomic implementation based on cmpxchg. So remove csky asm/atomic.h. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnd Bergmann <arnd@kernel.org> Cc: Paul E. McKenney <paulmck@kernel.org>
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Guo Ren authored
Current show_regs didn't display regs->usp and it confused debug. So fixup wrong SP display and add PT_REGS. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Guo Ren authored
Current perf init will failed with: [ 1.452433] csky-pmu: probe of soc:pmu failed with error -16 This patch fix it up with adding CPUHP_AP_PERF_CSKY_ONLINE in cpuhotplug.h. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
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Guo Ren authored
There are two ways for translating va to pa for csky: - Use TLB(Translate Lookup Buffer) and PTW (Page Table Walk) - Use SSEG0/1 (Simple Segment Mapping) We use tlb mapping 0-2G and 3G-4G virtual address area and SSEG0/1 are for 2G-2.5G and 2.5G-3G translation. We could disable SSEG0 to use 2G-2.5G as TLB user mapping. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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- Feb 08, 2021
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimmLinus Torvalds authored
Pull libnvdimm fixes from Dan Williams: "A fix for a crash scenario that has been present since the initial merge, a minor regression in sysfs attribute visibility, and a fix for some flexible array warnings. The bulk of this pull is an update to the libnvdimm unit test infrastructure to test non-ACPI platforms. Given there is zero regression risk for test updates, and the tests enable validation of bits headed towards the next merge window, I saw no reason to hold the new tests back. Santosh originally submitted this before the v5.11 window opened. Summary: - Fix a crash when sysfs accesses race 'dimm' driver probe/remove. - Fix a regression in 'resource' attribute visibility necessary for mapping badblocks and other physical address interrogations. - Fix some flexible array warnings - Expand the unit test infrastructure for non-ACPI platforms" * tag 'libnvdimm-fixes-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: libnvdimm/dimm: Avoid race between probe and available_slots_show() ndtest: Add papr health related flags ndtest: Add nvdimm control functions ndtest: Add regions and mappings to the test buses ndtest: Add dimm attributes ndtest: Add dimms to the two buses ndtest: Add compatability string to treat it as PAPR family testing/nvdimm: Add test module for non-nfit platforms libnvdimm/namespace: Fix visibility of namespace resource attribute libnvdimm/pmem: Remove unused header ACPI: NFIT: Fix flexible_array.cocci warnings
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git://git.infradead.org/users/hch/dma-mappingLinus Torvalds authored
Pull dma-mapping fix from Christoph Hellwig: "Fix a 32 vs 64-bit padding issue in the new benchmark code (Barry Song)" * tag 'dma-mapping-5.11-2' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: benchmark: use u8 for reserved field in uAPI structure
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull irq fixes from Borislav Petkov: - Prevent device managed IRQ allocation helpers from returning IRQ 0 - A fix for MSI activation of PCI endpoints with multiple MSIs * tag 'irq_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq: Prevent [devm_]irq_alloc_desc from returning irq 0 genirq/msi: Activate Multi-MSI early when MSI_FLAG_ACTIVATE_EARLY is set
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull syscall entry fixes from Borislav Petkov: - For syscall user dispatch, separate prctl operation from syscall redirection range specification before the API has been made official in 5.11. - Ensure tasks using the generic syscall code do trap after returning from a syscall when single-stepping is requested. * tag 'core_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: entry: Use different define for selector variable in SUD entry: Ensure trap after single-step on system call return
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull scheduler fix from Borislav Petkov: "Revert an attempt to not spread IRQ threads on isolated CPUs which has a bunch of problems" * tag 'sched_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: Revert "lib: Restrict cpumask_local_spread to houskeeping CPUs"
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull timer fixes from Borislav Petkov: "Two more timers-related fixes for v5.11: - Use a freezable workqueue for RTC sync because the sync can happen at any time and trigger suspend assertion checks in the i2c subsystem. - Correct a previous RTC validation change to check only bit 6 in register D because some Intel machines use bits 0-5" * tag 'timers_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: ntp: Use freezable workqueue for RTC synchronization rtc: mc146818: Dont test for bit 0-5 in Register D
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fixes from Borislav Petkov: "I hope this is the last batch of x86/urgent updates for this round: - Remove superfluous EFI PGD range checks which lead to those assertions failing with certain kernel configs and LLVM. - Disable setting breakpoints on facilities involved in #DB exception handling to avoid infinite loops. - Add extra serialization to non-serializing MSRs (IA32_TSC_DEADLINE and x2 APIC MSRs) to adhere to SDM's recommendation and avoid any theoretical issues. - Re-add the EPB MSR reading on turbostat so that it works on older kernels which don't have the corresponding EPB sysfs file. - Add Alder Lake to the list of CPUs which support split lock. - Fix %dr6 register handling in order to be able to set watchpoints with gdb again. - Disable CET instrumentation in the kernel so that gcc doesn't add ENDBR64 to kernel code and thus confuse tracing" * tag 'x86_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/efi: Remove EFI PGD build time checks x86/debug: Prevent data breakpoints on cpu_dr7 x86/debug: Prevent data breakpoints on __per_cpu_offset x86/apic: Add extra serialization for non-serializing MSRs tools/power/turbostat: Fallback to an MSR read for EPB x86/split_lock: Enable the split lock feature on another Alder Lake CPU x86/debug: Fix DR6 handling x86/build: Disable CET instrumentation in the kernel
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Linus Torvalds authored
Merge tag 'kbuild-fixes-v5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: - Use the 'python3' command to invoke python scripts because some distributions do not provide the 'python' command any more. - Clean-up and update documents - Use pkg-config to search libcrypto - Fix duplicated debug flags - Ignore some more stubs in scripts/kallsyms.c * tag 'kbuild-fixes-v5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kallsyms: fix nonconverging kallsyms table with lld kbuild: fix duplicated flags in DEBUG_CFLAGS scripts/clang-tools: switch explicitly to Python 3 kbuild: remove PYTHON variable Documentation/llvm: Add a section about supported architectures Revert "checkpatch: add check for keyword 'boolean' in Kconfig definitions" scripts: use pkg-config to locate libcrypto kconfig: mconf: fix HOSTCC call doc: gcc-plugins: update gcc-plugins.rst kbuild: simplify GCC_PLUGINS enablement in dummy-tools/gcc Documentation/Kbuild: Remove references to gcc-plugin.sh scripts: switch explicitly to Python 3
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- Feb 07, 2021
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git://git.samba.org/sfrench/cifs-2.6Linus Torvalds authored
Pull cifs fixes from Steve French: "Three small smb3 fixes for stable" * tag '5.11-rc6-smb3' of git://git.samba.org/sfrench/cifs-2.6: cifs: report error instead of invalid when revalidating a dentry fails smb3: fix crediting for compounding when only one request in flight smb3: Fix out-of-bounds bug in SMB2_negotiate()
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