From: Daniel Borkmann Date: Thu, 25 Jun 2015 22:01:05 +0000 (-0700) Subject: compiler-intel: fix wrong compiler barrier() macro X-Git-Tag: v4.9.8~4044^2~63 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b86a50c3b5414eafdbee7f34af4a201a4a7817c2;p=platform%2Fkernel%2Flinux-rpi3.git compiler-intel: fix wrong compiler barrier() macro Cleanup commit 73679e508201 ("compiler-intel.h: Remove duplicate definition") removed the double definition of __memory_barrier() intrinsics. However, in doing so, it also removed the preceding #undef barrier by accident, meaning, the actual barrier() macro from compiler-gcc.h with inline asm is still in place as __GNUC__ is provided. Subsequently, barrier() can never be defined as __memory_barrier() from compiler.h since it already has a definition in place and if we trust the comment in compiler-intel.h, ecc doesn't support gcc specific asm statements. I don't have an ecc at hand (unsure if that's still used in the field?) and only found this by accident during code review, a revert of that cleanup would be simplest option. Fixes: 73679e508201 ("compiler-intel.h: Remove duplicate definition") Signed-off-by: Daniel Borkmann Reviewed-by: Pranith Kumar Cc: Pranith Kumar Cc: H. Peter Anvin Cc: mancha security Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/include/linux/compiler-intel.h b/include/linux/compiler-intel.h index 0c9a2f2..d4c7113 100644 --- a/include/linux/compiler-intel.h +++ b/include/linux/compiler-intel.h @@ -13,10 +13,12 @@ /* Intel ECC compiler doesn't support gcc specific asm stmts. * It uses intrinsics to do the equivalent things. */ +#undef barrier #undef barrier_data #undef RELOC_HIDE #undef OPTIMIZER_HIDE_VAR +#define barrier() __memory_barrier() #define barrier_data(ptr) barrier() #define RELOC_HIDE(ptr, off) \