[PATCH v11 01/13] compiler.h, kasan: add __SANITIZE_ADDRESS__ check for __no_kasan_or_inline

From: Jarkko Sakkinen
Date: Fri Jun 08 2018 - 13:19:33 EST

From: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>

Add 'defined(__SANITIZE_ADDRESS__)' to check to determine whether
__no_kasan_or_inline should be 'no_kasan' or 'inline'. Files that
compile with KASAN disabled may not link to KASAN, in which case
the __maybe_unused attribute added in the 'no_kasan' option can
cause linker errors due to unused functions that manually invoke
KASAN functions, e.g. read_word_at_a_time(), not being discarded.

Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
include/linux/compiler.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index ab4711c63601..e7a863a3ac8c 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -188,7 +188,7 @@ void __read_once_size(const volatile void *p, void *res, int size)

+#if defined(CONFIG_KASAN) && defined(__SANITIZE_ADDRESS__)
* We can't declare function 'inline' because __no_sanitize_address confilcts
* with inlining. Attempt to inline it may cause a build failure.