diff options
Diffstat (limited to 'include/linux/kernel.h')
| -rw-r--r-- | include/linux/kernel.h | 121 |
1 files changed, 30 insertions, 91 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index e8343422240a..645231c373c8 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -1,6 +1,8 @@ #ifndef _LINUX_KERNEL_H #define _LINUX_KERNEL_H +#include <linux/sysinfo.h> + /* * 'kernel.h' contains some often-used function prototypes etc */ @@ -20,7 +22,6 @@ #include <linux/printk.h> #include <linux/dynamic_debug.h> #include <asm/byteorder.h> -#include <asm/bug.h> #define USHRT_MAX ((u16)(~0U)) #define SHRT_MAX ((s16)(USHRT_MAX>>1)) @@ -85,6 +86,19 @@ } \ ) +/* + * Multiplies an integer by a fraction, while avoiding unnecessary + * overflow or loss of precision. + */ +#define mult_frac(x, numer, denom)( \ +{ \ + typeof(x) quot = (x) / (denom); \ + typeof(x) rem = (x) % (denom); \ + (quot * (numer)) + ((rem * (numer)) / (denom)); \ +} \ +) + + #define _RET_IP_ (unsigned long)__builtin_return_address(0) #define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; }) @@ -299,6 +313,8 @@ extern long long simple_strtoll(const char *,char **,unsigned int); #define strict_strtoull kstrtoull #define strict_strtoll kstrtoll +extern int num_to_str(char *buf, int size, unsigned long long num); + /* lib/printf utilities */ extern __printf(2, 3) int sprintf(char *buf, const char * fmt, ...); @@ -315,10 +331,10 @@ extern __printf(2, 3) char *kasprintf(gfp_t gfp, const char *fmt, ...); extern char *kvasprintf(gfp_t gfp, const char *fmt, va_list args); -extern int sscanf(const char *, const char *, ...) - __attribute__ ((format (scanf, 2, 3))); -extern int vsscanf(const char *, const char *, va_list) - __attribute__ ((format (scanf, 2, 0))); +extern __scanf(2, 3) +int sscanf(const char *, const char *, ...); +extern __scanf(2, 0) +int vsscanf(const char *, const char *, va_list); extern int get_option(char **str, int *pint); extern char *get_options(const char *str, int nints, int *ints); @@ -414,16 +430,10 @@ extern int __must_check hex2bin(u8 *dst, const char *src, size_t count); * Most likely, you want to use tracing_on/tracing_off. */ #ifdef CONFIG_RING_BUFFER -void tracing_on(void); -void tracing_off(void); /* trace_off_permanent stops recording with no way to bring it back */ void tracing_off_permanent(void); -int tracing_is_on(void); #else -static inline void tracing_on(void) { } -static inline void tracing_off(void) { } static inline void tracing_off_permanent(void) { } -static inline int tracing_is_on(void) { return 0; } #endif enum ftrace_dump_mode { @@ -433,6 +443,10 @@ enum ftrace_dump_mode { }; #ifdef CONFIG_TRACING +void tracing_on(void); +void tracing_off(void); +int tracing_is_on(void); + extern void tracing_start(void); extern void tracing_stop(void); extern void ftrace_off_permanent(void); @@ -517,6 +531,11 @@ static inline void tracing_start(void) { } static inline void tracing_stop(void) { } static inline void ftrace_off_permanent(void) { } static inline void trace_dump_stack(void) { } + +static inline void tracing_on(void) { } +static inline void tracing_off(void) { } +static inline int tracing_is_on(void) { return 0; } + static inline int trace_printk(const char *fmt, ...) { @@ -662,67 +681,6 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { } const typeof( ((type *)0)->member ) *__mptr = (ptr); \ (type *)( (char *)__mptr - offsetof(type,member) );}) -#ifdef __CHECKER__ -#define BUILD_BUG_ON_NOT_POWER_OF_2(n) -#define BUILD_BUG_ON_ZERO(e) (0) -#define BUILD_BUG_ON_NULL(e) ((void*)0) -#define BUILD_BUG_ON(condition) -#define BUILD_BUG() (0) -#else /* __CHECKER__ */ - -/* 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); })) - -/** - * BUILD_BUG_ON - break compile if a condition is true. - * @condition: the condition which the compiler should know is false. - * - * If you have some code which relies on certain constants being equal, or - * other compile-time-evaluated condition, you should use BUILD_BUG_ON to - * detect if someone changes it. - * - * The implementation uses gcc's reluctance to create a negative array, but - * gcc (as of 4.4) only emits that error for obvious cases (eg. not arguments - * to inline functions). So as a fallback we use the optimizer; if it can't - * prove the condition is false, it will cause a link error on the undefined - * "__build_bug_on_failed". This error message can be harder to track down - * though, hence the two different methods. - */ -#ifndef __OPTIMIZE__ -#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) -#else -extern int __build_bug_on_failed; -#define BUILD_BUG_ON(condition) \ - do { \ - ((void)sizeof(char[1 - 2*!!(condition)])); \ - if (condition) __build_bug_on_failed = 1; \ - } while(0) -#endif - -/** - * BUILD_BUG - break compile if used. - * - * If you have some code that you expect the compiler to eliminate at - * build time, you should use BUILD_BUG to detect if it is - * unexpectedly used. - */ -#define BUILD_BUG() \ - do { \ - extern void __build_bug_failed(void) \ - __linktime_error("BUILD_BUG failed"); \ - __build_bug_failed(); \ - } while (0) - -#endif /* __CHECKER__ */ - /* Trap pasters of __FUNCTION__ at compile-time */ #define __FUNCTION__ (__func__) @@ -745,27 +703,8 @@ extern int __build_bug_on_failed; # define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD #endif -struct sysinfo; extern int do_sysinfo(struct sysinfo *info); #endif /* __KERNEL__ */ -#define SI_LOAD_SHIFT 16 -struct sysinfo { - long uptime; /* Seconds since boot */ - unsigned long loads[3]; /* 1, 5, and 15 minute load averages */ - unsigned long totalram; /* Total usable main memory size */ - unsigned long freeram; /* Available memory size */ - unsigned long sharedram; /* Amount of shared memory */ - unsigned long bufferram; /* Memory used by buffers */ - unsigned long totalswap; /* Total swap space size */ - unsigned long freeswap; /* swap space still available */ - unsigned short procs; /* Number of current processes */ - unsigned short pad; /* explicit padding for m68k */ - unsigned long totalhigh; /* Total high memory size */ - unsigned long freehigh; /* Available high memory size */ - unsigned int mem_unit; /* Memory unit size in bytes */ - char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */ -}; - #endif |