diff options
| author | Mark Brown <broonie@kernel.org> | 2024-02-19 16:58:41 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-02-19 16:58:41 +0000 |
| commit | d68ce3aa8142333a96a071a9a0207f21c04e54cc (patch) | |
| tree | 15754707ec571eb08c8d6308fe2459e46b8a5468 /include/linux/compiler-gcc.h | |
| parent | ec29a4d9b7c7329afc61e7932cb91e9b292b2b74 (diff) | |
| parent | b401b621758e46812da61fa58a67c3fd8d91de0d (diff) | |
regulator: Merge up v6.8-rc5
There are dependencies on the PWM fixes for some new work on the PWM
driver.
Diffstat (limited to 'include/linux/compiler-gcc.h')
| -rw-r--r-- | include/linux/compiler-gcc.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index aebb65bf95a7..75bd1692d2e3 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -64,6 +64,26 @@ __builtin_unreachable(); \ } while (0) +/* + * GCC 'asm goto' with outputs miscompiles certain code sequences: + * + * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113921 + * + * Work around it via the same compiler barrier quirk that we used + * to use for the old 'asm goto' workaround. + * + * Also, always mark such 'asm goto' statements as volatile: all + * asm goto statements are supposed to be volatile as per the + * documentation, but some versions of gcc didn't actually do + * that for asms with outputs: + * + * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98619 + */ +#ifdef CONFIG_GCC_ASM_GOTO_OUTPUT_WORKAROUND +#define asm_goto_output(x...) \ + do { asm volatile goto(x); asm (""); } while (0) +#endif + #if defined(CONFIG_ARCH_USE_BUILTIN_BSWAP) #define __HAVE_BUILTIN_BSWAP32__ #define __HAVE_BUILTIN_BSWAP64__ |