#ifndef __LINUX_COMPILER_H #error "Please don't include directly, include instead." #endif /* GCC 4.1.[01] miscompiles __weak */ #if __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ <= 1 # error Your version of gcc miscompiles the __weak directive #endif #define __used __attribute__((__used__)) #define __must_check __attribute__((warn_unused_result)) #define __compiler_offsetof(a,b) __builtin_offsetof(a,b) #define __always_inline inline __attribute__((always_inline)) /* * A trick to suppress uninitialized variable warning without generating any * code */ #define uninitialized_var(x) x = x #if __GNUC_MINOR__ >= 3 /* Mark functions as cold. gcc will assume any path leading to a call to them will be unlikely. This means a lot of manual unlikely()s are unnecessary now for any paths leading to the usual suspects like BUG(), printk(), panic() etc. [but let's keep them for now for older compilers] Early snapshots of gcc 4.3 don't support this and we can't detect this in the preprocessor, but we can live with this because they're unreleased. Maketime probing would be overkill here. gcc also has a __attribute__((__hot__)) to move hot functions into a special section, but I don't see any sense in this right now in the kernel context */ #define __cold __attribute__((__cold__)) #endif