| #ifndef _LINUX_KERNEL_H |
| #define _LINUX_KERNEL_H |
| |
| /* |
| * 'kernel.h' contains some often-used function prototypes etc |
| */ |
| |
| #ifdef __KERNEL__ |
| |
| #include <stdarg.h> |
| #include <linux/linkage.h> |
| #include <linux/stddef.h> |
| #include <linux/types.h> |
| #include <linux/compiler.h> |
| #include <linux/bitops.h> |
| #include <linux/log2.h> |
| #include <linux/typecheck.h> |
| #include <linux/ratelimit.h> |
| #include <asm/byteorder.h> |
| #include <asm/bug.h> |
| |
| extern const char linux_banner[]; |
| extern const char linux_proc_banner[]; |
| |
| #define USHORT_MAX ((u16)(~0U)) |
| #define SHORT_MAX ((s16)(USHORT_MAX>>1)) |
| #define SHORT_MIN (-SHORT_MAX - 1) |
| #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 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 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 _RET_IP_ (unsigned long)__builtin_return_address(0) |
| #define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; }) |
| |
| #ifdef CONFIG_LBD |
| # include <asm/div64.h> |
| # define sector_div(a, b) do_div(a, b) |
| #else |
| # define sector_div(n, b)( \ |
| { \ |
| int _res; \ |
| _res = (n) % (b); \ |
| (n) /= (b); \ |
| _res; \ |
| } \ |
| ) |
| #endif |
| |
| /** |
| * upper_32_bits - return bits 32-63 of a number |
| * @n: the number we're accessing |
| * |
| * A basic shift-right of a 64- or 32-bit quantity. Use this to suppress |
| * the "right shift count >= width of type" warning when that quantity is |
| * 32-bits. |
| */ |
| #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16)) |
| |
| #define KERN_EMERG "<0>" /* system is unusable */ |
| #define KERN_ALERT "<1>" /* action must be taken immediately */ |
| #define KERN_CRIT "<2>" /* critical conditions */ |
| #define KERN_ERR "<3>" /* error conditions */ |
| #define KERN_WARNING "<4>" /* warning conditions */ |
| #define KERN_NOTICE "<5>" /* normal but significant condition */ |
| #define KERN_INFO "<6>" /* informational */ |
| #define KERN_DEBUG "<7>" /* debug-level messages */ |
| |
| /* |
| * Annotation for a "continued" line of log printout (only done after a |
| * line that had no enclosing \n). Only to be used by core/arch code |
| * during early bootup (a continued line is not SMP-safe otherwise). |
| */ |
| #define KERN_CONT "" |
| |
| extern int console_printk[]; |
| |
| #define console_loglevel (console_printk[0]) |
| #define default_message_loglevel (console_printk[1]) |
| #define minimum_console_loglevel (console_printk[2]) |
| #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() \ |
| do { __might_sleep(__FILE__, __LINE__); might_resched(); } while (0) |
| #else |
| # define might_sleep() do { might_resched(); } while (0) |
| #endif |
| |
| #define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0) |
| |
| #define abs(x) ({ \ |
| int __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))) __cold; |
| extern void oops_enter(void); |
| extern void oops_exit(void); |
| extern int oops_may_print(void); |
| NORET_TYPE void do_exit(long error_code) |
| ATTRIB_NORET; |
| NORET_TYPE void complete_and_exit(struct completion *, long) |
| ATTRIB_NORET; |
| 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 strict_strtoul(const char *, unsigned int, unsigned long *); |
| extern int strict_strtol(const char *, unsigned int, long *); |
| extern int strict_strtoull(const char *, unsigned int, unsigned long long *); |
| extern int strict_strtoll(const char *, unsigned int, long long *); |
| extern int sprintf(char * buf, const char * fmt, ...) |
| __attribute__ ((format (printf, 2, 3))); |
| 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) |
| __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) |
| __attribute__ ((format (printf, 3, 0))); |
| extern char *kasprintf(gfp_t gfp, const char *fmt, ...) |
| __attribute__ ((format (printf, 2, 3))); |
| 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 int get_option(char **str, int *pint); |
| extern char *get_options(const char *str, int nints, int *ints); |
| extern unsigned long long memparse(const 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); |
| struct pid; |
| extern struct pid *session_of_pgrp(struct pid *pgrp); |
| |
| #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))) __cold; |
| |
| extern struct ratelimit_state printk_ratelimit_state; |
| extern int printk_ratelimit(void); |
| extern bool printk_timed_ratelimit(unsigned long *caller_jiffies, |
| unsigned int interval_msec); |
| #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 __cold printk(const char *s, ...) { return 0; } |
| static inline int printk_ratelimit(void) { return 0; } |
| static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, \ |
| unsigned int interval_msec) \ |
| { return false; } |
| #endif |
| |
| extern void asmlinkage __attribute__((format(printf, 1, 2))) |
| early_printk(const char *fmt, ...); |
| |
| unsigned long int_sqrt(unsigned long); |
| |
| static inline void console_silent(void) |
| { |
| console_loglevel = 0; |
| } |
| |
| static inline void console_verbose(void) |
| { |
| if (console_loglevel) |
| console_loglevel = 15; |
| } |
| |
| extern void bust_spinlocks(int yes); |
| extern void wake_up_klogd(void); |
| 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 panic_on_unrecovered_nmi; |
| extern int tainted; |
| extern const char *print_tainted(void); |
| extern void add_taint(unsigned); |
| extern int root_mountflags; |
| |
| /* Values used for system_state */ |
| 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) |
| #define TAINT_USER (1<<6) |
| #define TAINT_DIE (1<<7) |
| #define TAINT_OVERRIDDEN_ACPI_TABLE (1<<8) |
| #define TAINT_WARN (1<<9) |
| |
| extern void dump_stack(void) __cold; |
| |
| enum { |
| DUMP_PREFIX_NONE, |
| DUMP_PREFIX_ADDRESS, |
| DUMP_PREFIX_OFFSET |
| }; |
| extern void hex_dump_to_buffer(const void *buf, size_t len, |
| int rowsize, int groupsize, |
| char *linebuf, size_t linebuflen, bool ascii); |
| extern void print_hex_dump(const char *level, const char *prefix_str, |
| int prefix_type, int rowsize, int groupsize, |
| const void *buf, size_t len, bool ascii); |
| extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type, |
| const void *buf, size_t len); |
| |
| extern const char hex_asc[]; |
| #define hex_asc_lo(x) hex_asc[((x) & 0x0f)] |
| #define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] |
| |
| static inline char *pack_hex_byte(char *buf, u8 byte) |
| { |
| *buf++ = hex_asc_hi(byte); |
| *buf++ = hex_asc_lo(byte); |
| return buf; |
| } |
| |
| #define pr_emerg(fmt, arg...) \ |
| printk(KERN_EMERG fmt, ##arg) |
| #define pr_alert(fmt, arg...) \ |
| printk(KERN_ALERT fmt, ##arg) |
| #define pr_crit(fmt, arg...) \ |
| printk(KERN_CRIT fmt, ##arg) |
| #define pr_err(fmt, arg...) \ |
| printk(KERN_ERR fmt, ##arg) |
| #define pr_warning(fmt, arg...) \ |
| printk(KERN_WARNING fmt, ##arg) |
| #define pr_notice(fmt, arg...) \ |
| printk(KERN_NOTICE fmt, ##arg) |
| #define pr_info(fmt, arg...) \ |
| printk(KERN_INFO fmt, ##arg) |
| |
| #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...) \ |
| ({ if (0) printk(KERN_DEBUG fmt, ##arg); 0; }) |
| #endif |
| |
| /* |
| * Display an IP address in readable format. |
| */ |
| |
| #define NIPQUAD(addr) \ |
| ((unsigned char *)&addr)[0], \ |
| ((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]), \ |
| ntohs((addr).s6_addr16[1]), \ |
| ntohs((addr).s6_addr16[2]), \ |
| ntohs((addr).s6_addr16[3]), \ |
| ntohs((addr).s6_addr16[4]), \ |
| 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) \ |
| ((unsigned char *)&addr)[3], \ |
| ((unsigned char *)&addr)[2], \ |
| ((unsigned char *)&addr)[1], \ |
| ((unsigned char *)&addr)[0] |
| #elif defined(__BIG_ENDIAN) |
| #define HIPQUAD NIPQUAD |
| #else |
| #error "Please fix asm/byteorder.h" |
| #endif /* __LITTLE_ENDIAN */ |
| |
| /* |
| * min()/max()/clamp() macros that also do |
| * strict type-checking.. See the |
| * "unnecessary" pointer comparison. |
| */ |
| #define min(x, y) ({ \ |
| typeof(x) _min1 = (x); \ |
| typeof(y) _min2 = (y); \ |
| (void) (&_min1 == &_min2); \ |
| _min1 < _min2 ? _min1 : _min2; }) |
| |
| #define max(x, y) ({ \ |
| typeof(x) _max1 = (x); \ |
| typeof(y) _max2 = (y); \ |
| (void) (&_max1 == &_max2); \ |
| _max1 > _max2 ? _max1 : _max2; }) |
| |
| /** |
| * clamp - return a value clamped to a given range with strict typechecking |
| * @val: current value |
| * @min: minimum allowable value |
| * @max: maximum allowable value |
| * |
| * This macro does strict typechecking of min/max to make sure they are of the |
| * same type as val. See the unnecessary pointer comparisons. |
| */ |
| #define clamp(val, min, max) ({ \ |
| typeof(val) __val = (val); \ |
| typeof(min) __min = (min); \ |
| typeof(max) __max = (max); \ |
| (void) (&__val == &__min); \ |
| (void) (&__val == &__max); \ |
| __val = __val < __min ? __min: __val; \ |
| __val > __max ? __max: __val; }) |
| |
| /* |
| * ..and if you can't take the strict |
| * types, you can specify one yourself. |
| * |
| * Or not use min/max/clamp at all, of course. |
| */ |
| #define min_t(type, x, y) ({ \ |
| type __min1 = (x); \ |
| type __min2 = (y); \ |
| __min1 < __min2 ? __min1: __min2; }) |
| |
| #define max_t(type, x, y) ({ \ |
| type __max1 = (x); \ |
| type __max2 = (y); \ |
| __max1 > __max2 ? __max1: __max2; }) |
| |
| /** |
| * clamp_t - return a value clamped to a given range using a given type |
| * @type: the type of variable to use |
| * @val: current value |
| * @min: minimum allowable value |
| * @max: maximum allowable value |
| * |
| * This macro does no typechecking and uses temporary variables of type |
| * 'type' to make all the comparisons. |
| */ |
| #define clamp_t(type, val, min, max) ({ \ |
| type __val = (val); \ |
| type __min = (min); \ |
| type __max = (max); \ |
| __val = __val < __min ? __min: __val; \ |
| __val > __max ? __max: __val; }) |
| |
| /** |
| * clamp_val - return a value clamped to a given range using val's type |
| * @val: current value |
| * @min: minimum allowable value |
| * @max: maximum allowable value |
| * |
| * This macro does no typechecking and uses temporary variables of whatever |
| * type the input argument 'val' is. This is useful when val is an unsigned |
| * type and min and max are literals that will otherwise be assigned a signed |
| * integer type. |
| */ |
| #define clamp_val(val, min, max) ({ \ |
| typeof(val) __val = (val); \ |
| typeof(val) __min = (min); \ |
| typeof(val) __max = (max); \ |
| __val = __val < __min ? __min: __val; \ |
| __val > __max ? __max: __val; }) |
| |
| /** |
| * 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. |
| * |
| */ |
| #define container_of(ptr, type, member) ({ \ |
| const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
| (type *)( (char *)__mptr - offsetof(type,member) );}) |
| |
| 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.. */ |
| }; |
| |
| /* 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 */ |
| #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 |