9490991482
Introduce a macro for suppressing gcc from generating a warning about a probable uninitialized state of a variable. Example: - spinlock_t *ptl; + spinlock_t *uninitialized_var(ptl); Not a happy solution, but those warnings are obnoxious. - Using the usual pointlessly-set-it-to-zero approach wastes several bytes of text. - Using a macro means we can (hopefully) do something else if gcc changes cause the `x = x' hack to stop working - Using a macro means that people who are worried about hiding true bugs can easily turn it off. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
22 lines
584 B
C
22 lines
584 B
C
/* Never include this file directly. Include <linux/compiler.h> instead. */
|
|
|
|
/* These definitions are for GCC v3.x. */
|
|
#include <linux/compiler-gcc.h>
|
|
|
|
#if __GNUC_MINOR__ >= 3
|
|
# define __attribute_used__ __attribute__((__used__))
|
|
#else
|
|
# define __attribute_used__ __attribute__((__unused__))
|
|
#endif
|
|
|
|
#if __GNUC_MINOR__ >= 4
|
|
#define __must_check __attribute__((warn_unused_result))
|
|
#endif
|
|
|
|
/*
|
|
* A trick to suppress uninitialized variable warning without generating any
|
|
* code
|
|
*/
|
|
#define uninitialized_var(x) x = x
|
|
|
|
#define __always_inline inline __attribute__((always_inline))
|