The patch titled
Subject: kcov: remove pointless current != NULL check
has been added to the -mm tree. Its filename is
kcov-remove-pointless-current-=-null-check.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kcov-remove-pointless-current-%3D-null-check.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kcov-remove-pointless-current-%3D-null-check.patch
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------------------------------------------------------
From: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Subject: kcov: remove pointless current != NULL check
__sanitizer_cov_trace_pc() is a hot code, so it's worth to remove
pointless '!current' check. Current is never NULL.
Link: http://lkml.kernel.org/r/20170929162221.32500-1-aryabinin@xxxxxxxxxxxxx
Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Acked-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Acked-by: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/kcov.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/kcov.c~kcov-remove-pointless-current-=-null-check kernel/kcov.c
--- a/kernel/kcov.c~kcov-remove-pointless-current-=-null-check
+++ a/kernel/kcov.c
@@ -61,7 +61,7 @@ void notrace __sanitizer_cov_trace_pc(vo
* We are interested in code coverage as a function of a syscall inputs,
* so we ignore code executed in interrupts.
*/
- if (!t || !in_task())
+ if (!in_task())
return;
mode = READ_ONCE(t->kcov_mode);
if (mode == KCOV_MODE_TRACE) {
_
Patches currently in -mm which might be from aryabinin@xxxxxxxxxxxxx are
kcov-remove-pointless-current-=-null-check.patch
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