diff options
Diffstat (limited to 'include/common.h')
| -rw-r--r-- | include/common.h | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/include/common.h b/include/common.h index 2b40954a7e..76e9be9c27 100644 --- a/include/common.h +++ b/include/common.h @@ -45,7 +45,7 @@ #ifdef DEBUG #define pr_debug(fmt, arg...) printf(fmt, ##arg) #else -#define pr_debug(fmt, arg...) do {} while(0) +#define pr_debug(fmt, arg...) do {} while(0) #endif #define debug(fmt, arg...) pr_debug(fmt, ##arg) @@ -138,7 +138,32 @@ int arch_execute(void *, int argc, char *argv[]); int run_shell(void); -#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) +/* Force a compilation error if condition is true */ +#define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition)) + +/* Force a compilation error if condition is constant and true */ +#define MAYBE_BUILD_BUG_ON(cond) ((void)sizeof(char[1 - 2 * !!(cond)])) + +/* Force a compilation error if a constant expression is not a power of 2 */ +#define BUILD_BUG_ON_NOT_POWER_OF_2(n) \ + BUILD_BUG_ON((n) == 0 || (((n) & ((n) - 1)) != 0)) + +/* + * Force a compilation error if condition is true, but also produce a + * result (of value 0 and type size_t), so the expression can be used + * e.g. in a structure initializer (or where-ever else comma + * expressions aren't permitted). + */ +#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); })) +#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); })) + +#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1) +#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) +#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a))) +#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) + +#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) +#define ARRAY_AND_SIZE(x) (x), ARRAY_SIZE(x) /** * container_of - cast a member of a structure out to the containing structure @@ -164,4 +189,6 @@ int run_shell(void); #define LLONG_MIN (-LLONG_MAX - 1) #define ULLONG_MAX (~0ULL) +#define PAGE_SIZE 4096 + #endif /* __COMMON_H_ */ |