diff options
Diffstat (limited to 'include/linux/kernel.h')
| -rw-r--r-- | include/linux/kernel.h | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 604382143bc..a123b13b70f 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -1,15 +1,6 @@ #ifndef _LINUX_KERNEL_H #define _LINUX_KERNEL_H -#include <linux/sysinfo.h> - -/* - * 'kernel.h' contains some often-used function prototypes etc - */ -#define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1) -#define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) - -#ifdef __KERNEL__ #include <stdarg.h> #include <linux/linkage.h> @@ -22,6 +13,7 @@ #include <linux/printk.h> #include <linux/dynamic_debug.h> #include <asm/byteorder.h> +#include <uapi/linux/kernel.h> #define USHRT_MAX ((u16)(~0U)) #define SHRT_MAX ((s16)(USHRT_MAX>>1)) @@ -82,10 +74,18 @@ __x - (__x % (y)); \ } \ ) + +/* + * Divide positive or negative dividend by positive divisor and round + * to closest integer. Result is undefined for negative divisors. + */ #define DIV_ROUND_CLOSEST(x, divisor)( \ { \ - typeof(divisor) __divisor = divisor; \ - (((x) + ((__divisor) / 2)) / (__divisor)); \ + typeof(x) __x = x; \ + typeof(divisor) __d = divisor; \ + (((typeof(x))-1) > 0 || (__x) > 0) ? \ + (((__x) + ((__d) / 2)) / (__d)) : \ + (((__x) - ((__d) / 2)) / (__d)); \ } \ ) @@ -708,6 +708,4 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { } extern int do_sysinfo(struct sysinfo *info); -#endif /* __KERNEL__ */ - #endif |