From: Andrey Ryabinin <aryabinin@virtuozzo.com>
Date: Thu, 1 Feb 2018 18:00:48 +0000 (+0300)
Subject: compiler.h, kasan: Avoid duplicating __read_once_size_nocheck()
X-Git-Tag: v4.14.135~116
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=21b1e01dea2c8c6cd2dfc362c298ac7c654c6dc1;p=users%2Fdwmw2%2Flinux.git

compiler.h, kasan: Avoid duplicating __read_once_size_nocheck()

[ Upstream commit bdb5ac801af3d81d36732c2f640d6a1d3df83826 ]

Instead of having two identical __read_once_size_nocheck() functions
with different attributes, consolidate all the difference in new macro
__no_kasan_or_inline and use it. No functional changes.

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index a704d032713b9..f490d8d93ec34 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -185,23 +185,21 @@ void __read_once_size(const volatile void *p, void *res, int size)
 
 #ifdef CONFIG_KASAN
 /*
- * This function is not 'inline' because __no_sanitize_address confilcts
+ * We can't declare function 'inline' because __no_sanitize_address confilcts
  * with inlining. Attempt to inline it may cause a build failure.
  * 	https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368
  * '__maybe_unused' allows us to avoid defined-but-not-used warnings.
  */
-static __no_sanitize_address __maybe_unused
-void __read_once_size_nocheck(const volatile void *p, void *res, int size)
-{
-	__READ_ONCE_SIZE;
-}
+# define __no_kasan_or_inline __no_sanitize_address __maybe_unused
 #else
-static __always_inline
+# define __no_kasan_or_inline __always_inline
+#endif
+
+static __no_kasan_or_inline
 void __read_once_size_nocheck(const volatile void *p, void *res, int size)
 {
 	__READ_ONCE_SIZE;
 }
-#endif
 
 static __always_inline void __write_once_size(volatile void *p, void *res, int size)
 {