X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Flinux%2Fkernel.h;h=63fb18dcac3075fb0e75eef911b947e49309b32d;hb=refs%2Fheads%2Fvserver;hp=c1171e77c76bf6b5eb3c7790534716fd01b43ba4;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git diff --git a/include/linux/kernel.h b/include/linux/kernel.h index c1171e77c..63fb18dca 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -12,20 +12,33 @@ #include #include #include +#include +#include #include #include +extern const char linux_banner[]; +extern const char linux_proc_banner[]; + #define INT_MAX ((int)(~0U>>1)) #define INT_MIN (-INT_MAX - 1) #define UINT_MAX (~0U) #define LONG_MAX ((long)(~0UL>>1)) #define LONG_MIN (-LONG_MAX - 1) #define ULONG_MAX (~0UL) +#define LLONG_MAX ((long long)(~0ULL>>1)) +#define LLONG_MIN (-LLONG_MAX - 1) +#define ULLONG_MAX (~0ULL) #define STACK_MAGIC 0xdeadbeef +#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1) +#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) + #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) -#define ALIGN(x,a) (((x)+(a)-1)&~((a)-1)) +#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f)) +#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) +#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y)) #define KERN_EMERG "<0>" /* system is unusable */ #define KERN_ALERT "<1>" /* action must be taken immediately */ @@ -44,56 +57,112 @@ extern int console_printk[]; #define default_console_loglevel (console_printk[3]) struct completion; +struct pt_regs; +struct user; + +/** + * might_sleep - annotation for functions that can sleep + * + * this macro will print a stack trace if it is executed in an atomic + * context (spinlock, irq-handler, ...). + * + * This is a useful debugging help to be able to catch problems early and not + * be bitten later when the calling function happens to sleep when it is not + * supposed to. + */ +#ifdef CONFIG_PREEMPT_VOLUNTARY +extern int cond_resched(void); +# define might_resched() cond_resched() +#else +# define might_resched() do { } while (0) +#endif #ifdef CONFIG_DEBUG_SPINLOCK_SLEEP -void __might_sleep(char *file, int line); -#define might_sleep() __might_sleep(__FILE__, __LINE__) -#define might_sleep_if(cond) do { if (unlikely(cond)) might_sleep(); } while (0) + void __might_sleep(char *file, int line); +# define might_sleep() \ + do { __might_sleep(__FILE__, __LINE__); might_resched(); } while (0) #else -#define might_sleep() do {} while(0) -#define might_sleep_if(cond) do {} while (0) +# define might_sleep() do { might_resched(); } while (0) #endif -extern struct notifier_block *panic_notifier_list; +#define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0) + +#define abs(x) ({ \ + int __x = (x); \ + (__x < 0) ? -__x : __x; \ + }) + +#define labs(x) ({ \ + long __x = (x); \ + (__x < 0) ? -__x : __x; \ + }) + +extern struct atomic_notifier_head panic_notifier_list; +extern long (*panic_blink)(long time); NORET_TYPE void panic(const char * fmt, ...) __attribute__ ((NORET_AND format (printf, 1, 2))); -asmlinkage NORET_TYPE void do_exit(long error_code) +extern void oops_enter(void); +extern void oops_exit(void); +extern int oops_may_print(void); +fastcall NORET_TYPE void do_exit(long error_code) ATTRIB_NORET; NORET_TYPE void complete_and_exit(struct completion *, long) ATTRIB_NORET; -extern int abs(int); extern unsigned long simple_strtoul(const char *,char **,unsigned int); extern long simple_strtol(const char *,char **,unsigned int); extern unsigned long long simple_strtoull(const char *,char **,unsigned int); extern long long simple_strtoll(const char *,char **,unsigned int); extern int sprintf(char * buf, const char * fmt, ...) __attribute__ ((format (printf, 2, 3))); -extern int vsprintf(char *buf, const char *, va_list); +extern int vsprintf(char *buf, const char *, va_list) + __attribute__ ((format (printf, 2, 0))); extern int snprintf(char * buf, size_t size, const char * fmt, ...) __attribute__ ((format (printf, 3, 4))); -extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args); +extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) + __attribute__ ((format (printf, 3, 0))); extern int scnprintf(char * buf, size_t size, const char * fmt, ...) __attribute__ ((format (printf, 3, 4))); -extern int vscnprintf(char *buf, size_t size, const char *fmt, va_list args); +extern int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) + __attribute__ ((format (printf, 3, 0))); +extern char *kasprintf(gfp_t gfp, const char *fmt, ...) + __attribute__ ((format (printf, 2, 3))); 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, 3))); +extern int vsscanf(const char *, const char *, va_list) + __attribute__ ((format (scanf, 2, 0))); extern int get_option(char **str, int *pint); extern char *get_options(const char *str, int nints, int *ints); extern unsigned long long memparse(char *ptr, char **retptr); +extern int core_kernel_text(unsigned long addr); +extern int __kernel_text_address(unsigned long addr); extern int kernel_text_address(unsigned long addr); extern int session_of_pgrp(int pgrp); +extern void dump_thread(struct pt_regs *regs, struct user *dump); + +#ifdef CONFIG_PRINTK +asmlinkage int vprintk(const char *fmt, va_list args) + __attribute__ ((format (printf, 1, 0))); asmlinkage int printk(const char * fmt, ...) __attribute__ ((format (printf, 1, 2))); +#else +static inline int vprintk(const char *s, va_list args) + __attribute__ ((format (printf, 1, 0))); +static inline int vprintk(const char *s, va_list args) { return 0; } +static inline int printk(const char *s, ...) + __attribute__ ((format (printf, 1, 2))); +static inline int printk(const char *s, ...) { return 0; } +#endif unsigned long int_sqrt(unsigned long); extern int printk_ratelimit(void); extern int __printk_ratelimit(int ratelimit_jiffies, int ratelimit_burst); +extern bool printk_timed_ratelimit(unsigned long *caller_jiffies, + unsigned int interval_msec); static inline void console_silent(void) { @@ -108,29 +177,41 @@ static inline void console_verbose(void) extern void bust_spinlocks(int yes); extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */ +extern int panic_timeout; extern int panic_on_oops; -extern int system_state; /* See values below */ +extern int panic_on_unrecovered_nmi; extern int tainted; extern const char *print_tainted(void); +extern void add_taint(unsigned); /* Values used for system_state */ -#define SYSTEM_BOOTING 0 -#define SYSTEM_RUNNING 1 -#define SYSTEM_SHUTDOWN 2 +extern enum system_states { + SYSTEM_BOOTING, + SYSTEM_RUNNING, + SYSTEM_HALT, + SYSTEM_POWER_OFF, + SYSTEM_RESTART, + SYSTEM_SUSPEND_DISK, +} system_state; #define TAINT_PROPRIETARY_MODULE (1<<0) #define TAINT_FORCED_MODULE (1<<1) #define TAINT_UNSAFE_SMP (1<<2) #define TAINT_FORCED_RMMOD (1<<3) +#define TAINT_MACHINE_CHECK (1<<4) +#define TAINT_BAD_PAGE (1<<5) extern void dump_stack(void); #ifdef DEBUG +/* If you are writing a driver, please use dev_dbg instead */ #define pr_debug(fmt,arg...) \ printk(KERN_DEBUG fmt,##arg) #else -#define pr_debug(fmt,arg...) \ - do { } while (0) +static inline int __attribute__ ((format (printf, 1, 2))) pr_debug(const char * fmt, ...) +{ + return 0; +} #endif #define pr_info(fmt,arg...) \ @@ -145,6 +226,7 @@ extern void dump_stack(void); ((unsigned char *)&addr)[1], \ ((unsigned char *)&addr)[2], \ ((unsigned char *)&addr)[3] +#define NIPQUAD_FMT "%u.%u.%u.%u" #define NIP6(addr) \ ntohs((addr).s6_addr16[0]), \ @@ -155,6 +237,8 @@ extern void dump_stack(void); ntohs((addr).s6_addr16[5]), \ ntohs((addr).s6_addr16[6]), \ ntohs((addr).s6_addr16[7]) +#define NIP6_FMT "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x" +#define NIP6_SEQFMT "%04x%04x%04x%04x%04x%04x%04x%04x" #if defined(__LITTLE_ENDIAN) #define HIPQUAD(addr) \ @@ -199,7 +283,6 @@ extern void dump_stack(void); /** * container_of - cast a member of a structure out to the containing structure - * * @ptr: the pointer to the member. * @type: the type of the container struct this is embedded in. * @member: the name of the member within the struct. @@ -220,6 +303,15 @@ extern void dump_stack(void); 1; \ }) +/* + * Check at compile time that 'function' is a certain type, or is a pointer + * to that type (needs to use typedef for the function type.) + */ +#define typecheck_fn(type,function) \ +({ typeof(type) __tmp = function; \ + (void)__tmp; \ +}) + #endif /* __KERNEL__ */ #define SI_LOAD_SHIFT 16 @@ -240,12 +332,23 @@ struct sysinfo { char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */ }; -extern void BUILD_BUG(void); -#define BUILD_BUG_ON(condition) do { if (condition) BUILD_BUG(); } while(0) +/* Force a compilation error if condition is true */ +#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) + +/* 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(char[1 - 2 * !!(e)]) - 1) /* Trap pasters of __FUNCTION__ at compile-time */ -#if __GNUC__ > 2 || __GNUC_MINOR__ >= 95 #define __FUNCTION__ (__func__) + +/* This helps us to avoid #ifdef CONFIG_NUMA */ +#ifdef CONFIG_NUMA +#define NUMA_BUILD 1 +#else +#define NUMA_BUILD 0 #endif #endif