diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0003-x86-mm-Reimplement-flush_tlb_page-using-flush_tlb_mm.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0003-x86-mm-Reimplement-flush_tlb_page-using-flush_tlb_mm.patch | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0003-x86-mm-Reimplement-flush_tlb_page-using-flush_tlb_mm.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0003-x86-mm-Reimplement-flush_tlb_page-using-flush_tlb_mm.patch deleted file mode 100644 index 07dd1bf0..00000000 --- a/common/recipes-kernel/linux/linux-yocto-4.9.21/0003-x86-mm-Reimplement-flush_tlb_page-using-flush_tlb_mm.patch +++ /dev/null @@ -1,109 +0,0 @@ -From f34570e1f6c56f5557b9a3acd73fce47f5727479 Mon Sep 17 00:00:00 2001 -From: Andy Lutomirski <luto@kernel.org> -Date: Mon, 22 May 2017 15:30:01 -0700 -Subject: [PATCH 03/14] x86/mm: Reimplement flush_tlb_page() using - flush_tlb_mm_range() - -commit ca6c99c0794875c6d1db6e22f246699691ab7e6b upstream. - -flush_tlb_page() was very similar to flush_tlb_mm_range() except that -it had a couple of issues: - - - It was missing an smp_mb() in the case where - current->active_mm != mm. (This is a longstanding bug reported by Nadav Amit) - - - It was missing tracepoints and vm counter updates. - -The only reason that I can see for keeping it at as a separate -function is that it could avoid a few branches that -flush_tlb_mm_range() needs to decide to flush just one page. This -hardly seems worthwhile. If we decide we want to get rid of those -branches again, a better way would be to introduce an -__flush_tlb_mm_range() helper and make both flush_tlb_page() and -flush_tlb_mm_range() use it. - -Signed-off-by: Andy Lutomirski <luto@kernel.org> -Acked-by: Kees Cook <keescook@chromium.org> -Cc: Andrew Morton <akpm@linux-foundation.org> -Cc: Borislav Petkov <bpetkov@suse.de> -Cc: Dave Hansen <dave.hansen@intel.com> -Cc: Linus Torvalds <torvalds@linux-foundation.org> -Cc: Mel Gorman <mgorman@suse.de> -Cc: Michal Hocko <mhocko@suse.com> -Cc: Nadav Amit <nadav.amit@gmail.com> -Cc: Nadav Amit <namit@vmware.com> -Cc: Peter Zijlstra <peterz@infradead.org> -Cc: Rik van Riel <riel@redhat.com> -Cc: Thomas Gleixner <tglx@linutronix.de> -Cc: linux-mm@kvack.org -Link: http://lkml.kernel.org/r/3cc3847cf888d8907577569b8bac3f01992ef8f9.1495492063.git.luto@kernel.org -Signed-off-by: Ingo Molnar <mingo@kernel.org> -Cc: Hugh Dickins <hughd@google.com> -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - arch/x86/include/asm/tlbflush.h | 6 +++++- - arch/x86/mm/tlb.c | 27 --------------------------- - 2 files changed, 5 insertions(+), 28 deletions(-) - -diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h -index db8952a..eb5b512 100644 ---- a/arch/x86/include/asm/tlbflush.h -+++ b/arch/x86/include/asm/tlbflush.h -@@ -353,11 +353,15 @@ static inline void flush_tlb_kernel_range(unsigned long start, - flush_tlb_mm_range(vma->vm_mm, start, end, vma->vm_flags) - - extern void flush_tlb_all(void); --extern void flush_tlb_page(struct vm_area_struct *, unsigned long); - extern void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, - unsigned long end, unsigned long vmflag); - extern void flush_tlb_kernel_range(unsigned long start, unsigned long end); - -+static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long a) -+{ -+ flush_tlb_mm_range(vma->vm_mm, a, a + PAGE_SIZE, VM_NONE); -+} -+ - void native_flush_tlb_others(const struct cpumask *cpumask, - struct mm_struct *mm, - unsigned long start, unsigned long end); -diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c -index 2f9d41f..6884228 100644 ---- a/arch/x86/mm/tlb.c -+++ b/arch/x86/mm/tlb.c -@@ -387,33 +387,6 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, - preempt_enable(); - } - --void flush_tlb_page(struct vm_area_struct *vma, unsigned long start) --{ -- struct mm_struct *mm = vma->vm_mm; -- -- preempt_disable(); -- -- if (current->active_mm == mm) { -- if (current->mm) { -- /* -- * Implicit full barrier (INVLPG) that synchronizes -- * with switch_mm. -- */ -- __flush_tlb_one(start); -- } else { -- leave_mm(smp_processor_id()); -- -- /* Synchronize with switch_mm. */ -- smp_mb(); -- } -- } -- -- if (cpumask_any_but(mm_cpumask(mm), smp_processor_id()) < nr_cpu_ids) -- flush_tlb_others(mm_cpumask(mm), mm, start, 0UL); -- -- preempt_enable(); --} -- - static void do_flush_tlb_all(void *info) - { - count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED); --- -2.7.4 - |