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kcov: improve CONFIG_ARCH_HAS_KCOV help text

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The help text for CONFIG_ARCH_HAS_KCOV is stale, and describes the
feature as being enabled only for x86_64, when it is now enabled for
several architectures, including arm, arm64, powerpc, and s390.

Let's remove that stale help text, and update it along the lines of hat
for ARCH_HAS_FORTIFY_SOURCE, better describing when an architecture
should select CONFIG_ARCH_HAS_KCOV.

Link: http://lkml.kernel.org/r/20190412102733.5154-1-mark.rutland@arm.com
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mark Rutland 2019-04-18 17:50:37 -07:00 committed by Linus Torvalds
parent 3b991208b8
commit 40453c4f9b
1 changed files with 3 additions and 3 deletions
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6
lib/Kconfig.debug
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@ -753,9 +753,9 @@ endmenu # "Memory Debugging"
config ARCH_HAS_KCOV
bool
help
KCOV does not have any arch-specific code, but currently it is enabled
only for x86_64. KCOV requires testing on other archs, and most likely
disabling of instrumentation for some early boot code.
An architecture should select this when it can successfully
build and run with CONFIG_KCOV. This typically requires
disabling instrumentation for some early boot code.
config CC_HAS_SANCOV_TRACE_PC
def_bool $(cc-option,-fsanitize-coverage=trace-pc)