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| author | Tony Lindgren <tony@atomide.com> | 2020-06-08 20:14:49 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2020-06-08 20:14:49 +0300 |
| commit | 4263eb6880df8383fff0efb872278a99eb6142c8 (patch) | |
| tree | 67ab9bf228e4f5f341f9408e055180932b39fe06 /include/linux/compiler.h | |
| parent | 636338d7968e47c7f2e0b772a2a825ad932883fb (diff) | |
| parent | 8e326a8bdef3fb42b92bf2742e8405d9b9209367 (diff) | |
| download | linux-4263eb6880df8383fff0efb872278a99eb6142c8.tar.xz | |
Merge branch 'fixes-v5.7' into fixes
Diffstat (limited to 'include/linux/compiler.h')
| -rw-r--r-- | include/linux/compiler.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 034b0a644efc..448c91bf543b 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -356,4 +356,10 @@ static inline void *offset_to_ptr(const int *off) /* &a[0] degrades to a pointer: a different type from an array */ #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) +/* + * This is needed in functions which generate the stack canary, see + * arch/x86/kernel/smpboot.c::start_secondary() for an example. + */ +#define prevent_tail_call_optimization() mb() + #endif /* __LINUX_COMPILER_H */ |