+ kcov-dont-profile-branches-in-kcov.patch added to -mm tree

+ kcov-dont-profile-branches-in-kcov.patch added to -mm tree

[akpm]

The patch titled
     Subject: kcov: don't profile branches in kcov
has been added to the -mm tree.  Its filename is
     kcov-dont-profile-branches-in-kcov.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/kcov-dont-profile-branches-in-kcov.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/kcov-dont-profile-branches-in-kcov.patch

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------------------------------------------------------
From: Andrey Ryabinin <aryabinin@virtuozzo.com>
Subject: kcov: don't profile branches in kcov

Profiling 'if' statements in __sanitizer_cov_trace_pc() leads to
unbound recursion and crash:
	__sanitizer_cov_trace_pc() ->
		ftrace_likely_update ->
			__sanitizer_cov_trace_pc() ...

Define DISABLE_BRANCH_PROFILING to disable this tracer.

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/kcov.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN kernel/kcov.c~kcov-dont-profile-branches-in-kcov kernel/kcov.c
--- a/kernel/kcov.c~kcov-dont-profile-branches-in-kcov
+++ a/kernel/kcov.c
@@ -1,5 +1,6 @@
 #define pr_fmt(fmt) "kcov: " fmt
 
+#define DISABLE_BRANCH_PROFILING
 #include <linux/compiler.h>
 #include <linux/types.h>
 #include <linux/file.h>
_

Patches currently in -mm which might be from aryabinin@virtuozzo.com are

kcov-dont-profile-branches-in-kcov.patch