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| author | Takashi Iwai <tiwai@suse.de> | 2018-03-12 17:30:38 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2018-03-12 17:30:38 +0100 |
| commit | db45dc9540ea4864bb9d22eed30d3e70ed5d56d4 (patch) | |
| tree | c611d75097036ff464e9af31aa729e34c863ec93 /include/linux/compiler-gcc.h | |
| parent | 40088dc4e1ead7df31728c73f5b51d71da18831d (diff) | |
| parent | a3e39ed1f40e14f24bec0f91c4fa0408fb6c4d02 (diff) | |
| download | linux-db45dc9540ea4864bb9d22eed30d3e70ed5d56d4.tar.gz linux-db45dc9540ea4864bb9d22eed30d3e70ed5d56d4.tar.xz | |
Merge tag 'asoc-fix-v4.16-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v4.16
This is a fairly standard collection of fixes, there's no changes to the
core here just a bunch of small device specific changes for single
drivers plus an update to the MAINTAINERS file for the sgl5000.
Diffstat (limited to 'include/linux/compiler-gcc.h')
| -rw-r--r-- | include/linux/compiler-gcc.h | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index 631354acfa72..e2c7f4369eff 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -93,6 +93,10 @@ #define __weak __attribute__((weak)) #define __alias(symbol) __attribute__((alias(#symbol))) +#ifdef RETPOLINE +#define __noretpoline __attribute__((indirect_branch("keep"))) +#endif + /* * it doesn't make sense on ARM (currently the only user of __naked) * to trace naked functions because then mcount is called without @@ -167,8 +171,6 @@ #if GCC_VERSION >= 40100 # define __compiletime_object_size(obj) __builtin_object_size(obj, 0) - -#define __nostackprotector __attribute__((__optimize__("no-stack-protector"))) #endif #if GCC_VERSION >= 40300 @@ -196,6 +198,11 @@ #endif /* __CHECKER__ */ #endif /* GCC_VERSION >= 40300 */ +#if GCC_VERSION >= 40400 +#define __optimize(level) __attribute__((__optimize__(level))) +#define __nostackprotector __optimize("no-stack-protector") +#endif /* GCC_VERSION >= 40400 */ + #if GCC_VERSION >= 40500 #ifndef __CHECKER__ @@ -205,6 +212,15 @@ #endif /* + * calling noreturn functions, __builtin_unreachable() and __builtin_trap() + * confuse the stack allocation in gcc, leading to overly large stack + * frames, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82365 + * + * Adding an empty inline assembly before it works around the problem + */ +#define barrier_before_unreachable() asm volatile("") + +/* * Mark a position in code as unreachable. This can be used to * suppress control flow warnings after asm blocks that transfer * control elsewhere. @@ -214,7 +230,11 @@ * unreleased. Really, we need to have autoconf for the kernel. */ #define unreachable() \ - do { annotate_unreachable(); __builtin_unreachable(); } while (0) + do { \ + annotate_unreachable(); \ + barrier_before_unreachable(); \ + __builtin_unreachable(); \ + } while (0) /* Mark a function definition as prohibited from being cloned. */ #define __noclone __attribute__((__noclone__, __optimize__("no-tracer"))) |