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An LBR buffer fix for code that probably only worked accidentally.

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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-urgent-2021-06-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 perf fix from Ingo Molnar:
 "An LBR buffer fix for code that probably only worked accidentally"

* tag 'perf-urgent-2021-06-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel/lbr: Zero the xstate buffer on allocation
This commit is contained in:
Linus Torvalds 2021-06-24 08:55:12 -07:00
commit df50110004
1 changed files with 2 additions and 1 deletions
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3
arch/x86/events/intel/lbr.c
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@ -731,7 +731,8 @@ void reserve_lbr_buffers(void)
if (!kmem_cache || cpuc->lbr_xsave) if (!kmem_cache || cpuc->lbr_xsave)
continue; continue;
cpuc->lbr_xsave = kmem_cache_alloc_node(kmem_cache, GFP_KERNEL, cpuc->lbr_xsave = kmem_cache_alloc_node(kmem_cache,
GFP_KERNEL | __GFP_ZERO,
cpu_to_node(cpu)); cpu_to_node(cpu));
} }
} }