diff options
| author | Eric Dumazet <edumazet@google.com> | 2025-12-19 11:20:06 +0000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2025-12-20 14:47:05 -0800 |
| commit | 4cc5373f2e749a6c96e8b9fa971931a4dd852860 (patch) | |
| tree | 60a3d2520d521268ccc7594d1b5865068aff70af /include/linux/compiler-clang.h | |
| parent | f67e8a5e3ead61692d24a68e30496bd2634f5b68 (diff) | |
clang: work around asm output constraint problems
Work around clang problems with "=rm" asm constraint.
clang seems to always chose the memory output, while it is almost
always the worst choice.
Add ASM_OUTPUT_RM so that we can replace "=rm" constraint
where it matters for clang, while not penalizing gcc.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Suggested-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/compiler-clang.h')
| -rw-r--r-- | include/linux/compiler-clang.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h index 107ce05bd16e..7edf1a07b535 100644 --- a/include/linux/compiler-clang.h +++ b/include/linux/compiler-clang.h @@ -145,6 +145,7 @@ */ #define ASM_INPUT_G "ir" #define ASM_INPUT_RM "r" +#define ASM_OUTPUT_RM "=r" /* * Declare compiler support for __typeof_unqual__() operator. |