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authorPeter Zijlstra <peterz@infradead.org>2019-04-16 10:03:35 +0200
committerIngo Molnar <mingo@kernel.org>2019-04-16 10:10:13 +0200
commit780e0106d468a2962b16b52fdf42898f2639e0a0 (patch)
tree8ab5b23a033073a2bb3fc233c1a053ebcec635ce /arch/x86
parent0082517fa4bce073e7cf542633439f26538a14cc (diff)
x86/mm/tlb: Revert "x86/mm: Align TLB invalidation info"
Revert the following commit: 515ab7c41306: ("x86/mm: Align TLB invalidation info") I found out (the hard way) that under some .config options (notably L1_CACHE_SHIFT=7) and compiler combinations this on-stack alignment leads to a 320 byte stack usage, which then triggers a KASAN stack warning elsewhere. Using 320 bytes of stack space for a 40 byte structure is ludicrous and clearly not right. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Nadav Amit <namit@vmware.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 515ab7c41306 ("x86/mm: Align TLB invalidation info") Link: http://lkml.kernel.org/r/20190416080335.GM7905@worktop.programming.kicks-ass.net [ Minor changelog edits. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/mm/tlb.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index bc4bc7b2f075..487b8474c01c 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -728,7 +728,7 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
{
int cpu;
- struct flush_tlb_info info __aligned(SMP_CACHE_BYTES) = {
+ struct flush_tlb_info info = {
.mm = mm,
.stride_shift = stride_shift,
.freed_tables = freed_tables,