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| author | Peter Zijlstra <peterz@infradead.org> | 2020-05-19 20:34:12 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-05-19 20:34:12 +0200 |
| commit | 9013196a467e770e1470cccee6c0fe435ef37c66 (patch) | |
| tree | 2aefbb9d14a1a7513af9e752fe5bb80cf6b00c0c /include/linux/compiler.h | |
| parent | 2a0a24ebb499c9d499eea948d3fc108f936e36d4 (diff) | |
| parent | 39f23ce07b9355d05a64ae303ce20d1c4b92b957 (diff) | |
Merge branch 'sched/urgent'
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 */ |