include/linux/compiler-gcc3.h

   1 #ifndef __LINUX_COMPILER_H
   2 #error "Please don't include <linux/compiler-gcc3.h> directly, include <linux/compiler.h> instead."
   3 #endif
   4
   5 #if __GNUC_MINOR__ < 2
   6 # error Sorry, your compiler is too old - please upgrade it.
   7 #endif
   8
   9 #if __GNUC_MINOR__ >= 3
  10 # define __used                 __attribute__((__used__))
  11 #else
  12 # define __used                 __attribute__((__unused__))
  13 #endif
  14
  15 #if __GNUC_MINOR__ >= 4
  16 #define __must_check            __attribute__((warn_unused_result))
  17 #endif
  18
  19 /*
  20  * A trick to suppress uninitialized variable warning without generating any
  21  * code
  22  */
  23 #define uninitialized_var(x) x = x
  24
  25 #define __always_inline         inline __attribute__((always_inline))