linux-kernel - [PATCH] kasan: Makefile: shut up warnings if CONFIG_COMPILE

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Date:	Wed, 08 Apr 2015 18:38:25 +0300
From:	Andrey Ryabinin <a.ryabinin@...sung.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Michal Marek <mmarek@...e.cz>, linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Andrey Ryabinin <a.ryabinin@...sung.com>
Subject: [PATCH] kasan: Makefile: shut up warnings if CONFIG_COMPILE_TEST=y

It might be annoying to constantly see this:

	scripts/Makefile.kasan:16: Cannot use CONFIG_KASAN: -fsanitize=kernel-address is not supported by compiler

while performing allmodconfig/allyesconfig build tests.
Disable this warning if CONFIG_COMPILE_TEST=y.

Signed-off-by: Andrey Ryabinin <a.ryabinin@...sung.com>
---
 scripts/Makefile.kasan | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan
index 631619b..3f874d2 100644
--- a/scripts/Makefile.kasan
+++ b/scripts/Makefile.kasan
@@ -13,12 +13,16 @@ CFLAGS_KASAN := $(call cc-option, -fsanitize=kernel-address \
 		--param asan-instrumentation-with-call-threshold=$(call_threshold))
 
 ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),)
+   ifneq ($(CONFIG_COMPILE_TEST),y)
         $(warning Cannot use CONFIG_KASAN: \
             -fsanitize=kernel-address is not supported by compiler)
+   endif
 else
     ifeq ($(CFLAGS_KASAN),)
-        $(warning CONFIG_KASAN: compiler does not support all options.\
-            Trying minimal configuration)
+        ifneq ($(CONFIG_COMPILE_TEST),y)
+            $(warning CONFIG_KASAN: compiler does not support all options.\
+                Trying minimal configuration)
+        endif
         CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL)
     endif
 endif
-- 
2.3.5

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