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| author |   Wolfram Sang <wsa@kernel.org> | 2020-05-20 15:27:45 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2020-05-20 15:27:45 +0200 |
| commit | f89c326dcaa0cb8c3af7764e75eeed4e3f3c879a (patch) | |
| tree | 31a5967da1f04180a1a922258f6947ad17255ee8 /tools/include/linux/compiler.h | |
| parent | i2c: core: support bus regulator controlling in adapter (diff) | |
| parent | MAINTAINERS: add maintainer for mediatek i2c controller driver (diff) | |
| download | linux-dev-f89c326dcaa0cb8c3af7764e75eeed4e3f3c879a.tar.xz linux-dev-f89c326dcaa0cb8c3af7764e75eeed4e3f3c879a.zip | |
Merge branch 'i2c/for-current-fixed' into i2c/for-5.8
Diffstat (limited to 'tools/include/linux/compiler.h')
| -rw-r--r-- | tools/include/linux/compiler.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tools/include/linux/compiler.h b/tools/include/linux/compiler.h index 1827c2f973f9..180f7714a5f1 100644 --- a/tools/include/linux/compiler.h +++ b/tools/include/linux/compiler.h @@ -10,6 +10,32 @@ # define __compiletime_error(message) #endif +#ifdef __OPTIMIZE__ +# define __compiletime_assert(condition, msg, prefix, suffix) \ + do { \ + extern void prefix ## suffix(void) __compiletime_error(msg); \ + if (!(condition)) \ + prefix ## suffix(); \ + } while (0) +#else +# define __compiletime_assert(condition, msg, prefix, suffix) do { } while (0) +#endif + +#define _compiletime_assert(condition, msg, prefix, suffix) \ + __compiletime_assert(condition, msg, prefix, suffix) + +/** + * compiletime_assert - break build and emit msg if condition is false + * @condition: a compile-time constant condition to check + * @msg: a message to emit if condition is false + * + * In tradition of POSIX assert, this macro will break the build if the + * supplied condition is *false*, emitting the supplied error message if the + * compiler has support to do so. + */ +#define compiletime_assert(condition, msg) \ + _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) + /* Optimization barrier */ /* The "volatile" is due to gcc bugs */ #define barrier() __asm__ __volatile__("": : :"memory") |