| #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> |
| #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/printk.h> |
| #include <linux/dynamic_debug.h> |
| #include <asm/byteorder.h> |
| |
| #define USHRT_MAX ((u16)(~0U)) |
| #define SHRT_MAX ((s16)(USHRT_MAX>>1)) |
| #define SHRT_MIN ((s16)(-SHRT_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 SIZE_MAX (~(size_t)0) |
| |
| #define STACK_MAGIC 0xdeadbeef |
| |
| #define REPEAT_BYTE(x) ((~0ul / 0xff) * (x)) |
| |
| #define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) |
| #define __ALIGN_MASK(x, mask) __ALIGN_KERNEL_MASK((x), (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)) |
| |
| /* |
| * This looks more complex than it should be. But we need to |
| * get the type for the ~ right in round_down (it needs to be |
| * as wide as the result!), and we want to evaluate the macro |
| * arguments just once each. |
| */ |
| #define __round_mask(x, y) ((__typeof__(x))((y)-1)) |
| #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) |
| #define round_down(x, y) ((x) & ~__round_mask(x, y)) |
| |
| #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f)) |
| #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) |
| #define DIV_ROUND_UP_ULL(ll,d) \ |
| ({ unsigned long long _tmp = (ll)+(d)-1; do_div(_tmp, d); _tmp; }) |
| |
| #if BITS_PER_LONG == 32 |
| # define DIV_ROUND_UP_SECTOR_T(ll,d) DIV_ROUND_UP_ULL(ll, d) |
| #else |
| # define DIV_ROUND_UP_SECTOR_T(ll,d) DIV_ROUND_UP(ll,d) |
| #endif |
| |
| /* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */ |
| #define roundup(x, y) ( \ |
| { \ |
| const typeof(y) __y = y; \ |
| (((x) + (__y - 1)) / __y) * __y; \ |
| } \ |
| ) |
| #define rounddown(x, y) ( \ |
| { \ |
| typeof(x) __x = (x); \ |
| __x - (__x % (y)); \ |
| } \ |
| ) |
| #define DIV_ROUND_CLOSEST(x, divisor)( \ |
| { \ |
| typeof(divisor) __divisor = divisor; \ |
| (((x) + ((__divisor) / 2)) / (__divisor)); \ |
| } \ |
| ) |
| |
| /* |
| * 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; }) |
| |
| #ifdef CONFIG_LBDAF |
| # 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)) |
| |
| /** |
| * lower_32_bits - return bits 0-31 of a number |
| * @n: the number we're accessing |
| */ |
| #define lower_32_bits(n) ((u32)(n)) |
| |
| struct completion; |
| struct pt_regs; |
| struct user; |
| |
| #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_ATOMIC_SLEEP |
| void __might_sleep(const char *file, int line, int preempt_offset); |
| /** |
| * 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. |
| */ |
| # define might_sleep() \ |
| do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0) |
| #else |
| static inline void __might_sleep(const char *file, int line, |
| int preempt_offset) { } |
| # define might_sleep() do { might_resched(); } while (0) |
| #endif |
| |
| #define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0) |
| |
| /* |
| * abs() handles unsigned and signed longs, ints, shorts and chars. For all |
| * input types abs() returns a signed long. |
| * abs() should not be used for 64-bit types (s64, u64, long long) - use abs64() |
| * for those. |
| */ |
| #define abs(x) ({ \ |
| long ret; \ |
| if (sizeof(x) == sizeof(long)) { \ |
| long __x = (x); \ |
| ret = (__x < 0) ? -__x : __x; \ |
| } else { \ |
| int __x = (x); \ |
| ret = (__x < 0) ? -__x : __x; \ |
| } \ |
| ret; \ |
| }) |
| |
| #define abs64(x) ({ \ |
| s64 __x = (x); \ |
| (__x < 0) ? -__x : __x; \ |
| }) |
| |
| #ifdef CONFIG_PROVE_LOCKING |
| void might_fault(void); |
| #else |
| static inline void might_fault(void) |
| { |
| might_sleep(); |
| } |
| #endif |
| |
| extern struct atomic_notifier_head panic_notifier_list; |
| extern long (*panic_blink)(int state); |
| __printf(1, 2) |
| void panic(const char *fmt, ...) |
| __noreturn __cold; |
| extern void oops_enter(void); |
| extern void oops_exit(void); |
| void print_oops_end_marker(void); |
| extern int oops_may_print(void); |
| void do_exit(long error_code) |
| __noreturn; |
| void complete_and_exit(struct completion *, long) |
| __noreturn; |
| |
| /* Internal, do not use. */ |
| int __must_check _kstrtoul(const char *s, unsigned int base, unsigned long *res); |
| int __must_check _kstrtol(const char *s, unsigned int base, long *res); |
| |
| int __must_check kstrtoull(const char *s, unsigned int base, unsigned long long *res); |
| int __must_check kstrtoll(const char *s, unsigned int base, long long *res); |
| static inline int __must_check kstrtoul(const char *s, unsigned int base, unsigned long *res) |
| { |
| /* |
| * We want to shortcut function call, but |
| * __builtin_types_compatible_p(unsigned long, unsigned long long) = 0. |
| */ |
| if (sizeof(unsigned long) == sizeof(unsigned long long) && |
| __alignof__(unsigned long) == __alignof__(unsigned long long)) |
| return kstrtoull(s, base, (unsigned long long *)res); |
| else |
| return _kstrtoul(s, base, res); |
| } |
| |
| static inline int __must_check kstrtol(const char *s, unsigned int base, long *res) |
| { |
| /* |
| * We want to shortcut function call, but |
| * __builtin_types_compatible_p(long, long long) = 0. |
| */ |
| if (sizeof(long) == sizeof(long long) && |
| __alignof__(long) == __alignof__(long long)) |
| return kstrtoll(s, base, (long long *)res); |
| else |
| return _kstrtol(s, base, res); |
| } |
| |
| int __must_check kstrtouint(const char *s, unsigned int base, unsigned int *res); |
| int __must_check kstrtoint(const char *s, unsigned int base, int *res); |
| |
| static inline int __must_check kstrtou64(const char *s, unsigned int base, u64 *res) |
| { |
| return kstrtoull(s, base, res); |
| } |
| |
| static inline int __must_check kstrtos64(const char *s, unsigned int base, s64 *res) |
| { |
| return kstrtoll(s, base, res); |
| } |
| |
| static inline int __must_check kstrtou32(const char *s, unsigned int base, u32 *res) |
| { |
| return kstrtouint(s, base, res); |
| } |
| |
| static inline int __must_check kstrtos32(const char *s, unsigned int base, s32 *res) |
| { |
| return kstrtoint(s, base, res); |
| } |
| |
| int __must_check kstrtou16(const char *s, unsigned int base, u16 *res); |
| int __must_check kstrtos16(const char *s, unsigned int base, s16 *res); |
| int __must_check kstrtou8(const char *s, unsigned int base, u8 *res); |
| int __must_check kstrtos8(const char *s, unsigned int base, s8 *res); |
| |
| int __must_check kstrtoull_from_user(const char __user *s, size_t count, unsigned int base, unsigned long long *res); |
| int __must_check kstrtoll_from_user(const char __user *s, size_t count, unsigned int base, long long *res); |
| int __must_check kstrtoul_from_user(const char __user *s, size_t count, unsigned int base, unsigned long *res); |
| int __must_check kstrtol_from_user(const char __user *s, size_t count, unsigned int base, long *res); |
| int __must_check kstrtouint_from_user(const char __user *s, size_t count, unsigned int base, unsigned int *res); |
| int __must_check kstrtoint_from_user(const char __user *s, size_t count, unsigned int base, int *res); |
| int __must_check kstrtou16_from_user(const char __user *s, size_t count, unsigned int base, u16 *res); |
| int __must_check kstrtos16_from_user(const char __user *s, size_t count, unsigned int base, s16 *res); |
| int __must_check kstrtou8_from_user(const char __user *s, size_t count, unsigned int base, u8 *res); |
| int __must_check kstrtos8_from_user(const char __user *s, size_t count, unsigned int base, s8 *res); |
| |
| static inline int __must_check kstrtou64_from_user(const char __user *s, size_t count, unsigned int base, u64 *res) |
| { |
| return kstrtoull_from_user(s, count, base, res); |
| } |
| |
| static inline int __must_check kstrtos64_from_user(const char __user *s, size_t count, unsigned int base, s64 *res) |
| { |
| return kstrtoll_from_user(s, count, base, res); |
| } |
| |
| static inline int __must_check kstrtou32_from_user(const char __user *s, size_t count, unsigned int base, u32 *res) |
| { |
| return kstrtouint_from_user(s, count, base, res); |
| } |
| |
| static inline int __must_check kstrtos32_from_user(const char __user *s, size_t count, unsigned int base, s32 *res) |
| { |
| return kstrtoint_from_user(s, count, base, res); |
| } |
| |
| /* Obsolete, do not use. Use kstrto<foo> instead */ |
| |
| 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); |
| #define strict_strtoul kstrtoul |
| #define strict_strtol kstrtol |
| #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, ...); |
| extern __printf(2, 0) int vsprintf(char *buf, const char *, va_list); |
| extern __printf(3, 4) |
| int snprintf(char *buf, size_t size, const char *fmt, ...); |
| extern __printf(3, 0) |
| int vsnprintf(char *buf, size_t size, const char *fmt, va_list args); |
| extern __printf(3, 4) |
| int scnprintf(char *buf, size_t size, const char *fmt, ...); |
| extern __printf(3, 0) |
| int vscnprintf(char *buf, size_t size, const char *fmt, va_list args); |
| 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 __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); |
| extern unsigned long long memparse(const char *ptr, char **retptr); |
| |
| extern int core_kernel_text(unsigned long addr); |
| extern int core_kernel_data(unsigned long addr); |
| extern int __kernel_text_address(unsigned long addr); |
| extern int kernel_text_address(unsigned long addr); |
| extern int func_ptr_is_kernel_text(void *ptr); |
| |
| struct pid; |
| extern struct pid *session_of_pgrp(struct pid *pgrp); |
| |
| unsigned long int_sqrt(unsigned long); |
| |
| 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 panic_on_io_nmi; |
| extern int sysctl_panic_on_stackoverflow; |
| extern const char *print_tainted(void); |
| extern void add_taint(unsigned flag); |
| extern int test_taint(unsigned flag); |
| extern unsigned long get_taint(void); |
| extern int root_mountflags; |
| |
| extern bool early_boot_irqs_disabled; |
| |
| /* Values used for system_state */ |
| extern enum system_states { |
| SYSTEM_BOOTING, |
| SYSTEM_RUNNING, |
| SYSTEM_HALT, |
| SYSTEM_POWER_OFF, |
| SYSTEM_RESTART, |
| } system_state; |
| |
| #define TAINT_PROPRIETARY_MODULE 0 |
| #define TAINT_FORCED_MODULE 1 |
| #define TAINT_UNSAFE_SMP 2 |
| #define TAINT_FORCED_RMMOD 3 |
| #define TAINT_MACHINE_CHECK 4 |
| #define TAINT_BAD_PAGE 5 |
| #define TAINT_USER 6 |
| #define TAINT_DIE 7 |
| #define TAINT_OVERRIDDEN_ACPI_TABLE 8 |
| #define TAINT_WARN 9 |
| #define TAINT_CRAP 10 |
| #define TAINT_FIRMWARE_WORKAROUND 11 |
| #define TAINT_OOT_MODULE 12 |
| |
| 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 *hex_byte_pack(char *buf, u8 byte) |
| { |
| *buf++ = hex_asc_hi(byte); |
| *buf++ = hex_asc_lo(byte); |
| return buf; |
| } |
| |
| static inline char * __deprecated pack_hex_byte(char *buf, u8 byte) |
| { |
| return hex_byte_pack(buf, byte); |
| } |
| |
| extern int hex_to_bin(char ch); |
| extern int __must_check hex2bin(u8 *dst, const char *src, size_t count); |
| |
| /* |
| * General tracing related utility functions - trace_printk(), |
| * tracing_on/tracing_off and tracing_start()/tracing_stop |
| * |
| * Use tracing_on/tracing_off when you want to quickly turn on or off |
| * tracing. It simply enables or disables the recording of the trace events. |
| * This also corresponds to the user space /sys/kernel/debug/tracing/tracing_on |
| * file, which gives a means for the kernel and userspace to interact. |
| * Place a tracing_off() in the kernel where you want tracing to end. |
| * From user space, examine the trace, and then echo 1 > tracing_on |
| * to continue tracing. |
| * |
| * tracing_stop/tracing_start has slightly more overhead. It is used |
| * by things like suspend to ram where disabling the recording of the |
| * trace is not enough, but tracing must actually stop because things |
| * like calling smp_processor_id() may crash the system. |
| * |
| * Most likely, you want to use tracing_on/tracing_off. |
| */ |
| #ifdef CONFIG_RING_BUFFER |
| /* trace_off_permanent stops recording with no way to bring it back */ |
| void tracing_off_permanent(void); |
| #else |
| static inline void tracing_off_permanent(void) { } |
| #endif |
| |
| enum ftrace_dump_mode { |
| DUMP_NONE, |
| DUMP_ALL, |
| DUMP_ORIG, |
| }; |
| |
| #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); |
| |
| static inline __printf(1, 2) |
| void ____trace_printk_check_format(const char *fmt, ...) |
| { |
| } |
| #define __trace_printk_check_format(fmt, args...) \ |
| do { \ |
| if (0) \ |
| ____trace_printk_check_format(fmt, ##args); \ |
| } while (0) |
| |
| /** |
| * trace_printk - printf formatting in the ftrace buffer |
| * @fmt: the printf format for printing |
| * |
| * Note: __trace_printk is an internal function for trace_printk and |
| * the @ip is passed in via the trace_printk macro. |
| * |
| * This function allows a kernel developer to debug fast path sections |
| * that printk is not appropriate for. By scattering in various |
| * printk like tracing in the code, a developer can quickly see |
| * where problems are occurring. |
| * |
| * This is intended as a debugging tool for the developer only. |
| * Please refrain from leaving trace_printks scattered around in |
| * your code. |
| */ |
| |
| #define trace_printk(fmt, args...) \ |
| do { \ |
| static const char *trace_printk_fmt \ |
| __attribute__((section("__trace_printk_fmt"))) = \ |
| __builtin_constant_p(fmt) ? fmt : NULL; \ |
| \ |
| __trace_printk_check_format(fmt, ##args); \ |
| \ |
| if (__builtin_constant_p(fmt)) \ |
| __trace_bprintk(_THIS_IP_, trace_printk_fmt, ##args); \ |
| else \ |
| __trace_printk(_THIS_IP_, fmt, ##args); \ |
| } while (0) |
| |
| extern __printf(2, 3) |
| int __trace_bprintk(unsigned long ip, const char *fmt, ...); |
| |
| extern __printf(2, 3) |
| int __trace_printk(unsigned long ip, const char *fmt, ...); |
| |
| extern void trace_dump_stack(void); |
| |
| /* |
| * The double __builtin_constant_p is because gcc will give us an error |
| * if we try to allocate the static variable to fmt if it is not a |
| * constant. Even with the outer if statement. |
| */ |
| #define ftrace_vprintk(fmt, vargs) \ |
| do { \ |
| if (__builtin_constant_p(fmt)) { \ |
| static const char *trace_printk_fmt \ |
| __attribute__((section("__trace_printk_fmt"))) = \ |
| __builtin_constant_p(fmt) ? fmt : NULL; \ |
| \ |
| __ftrace_vbprintk(_THIS_IP_, trace_printk_fmt, vargs); \ |
| } else \ |
| __ftrace_vprintk(_THIS_IP_, fmt, vargs); \ |
| } while (0) |
| |
| extern int |
| __ftrace_vbprintk(unsigned long ip, const char *fmt, va_list ap); |
| |
| extern int |
| __ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap); |
| |
| extern void ftrace_dump(enum ftrace_dump_mode oops_dump_mode); |
| #else |
| static inline __printf(1, 2) |
| int trace_printk(const char *fmt, ...); |
| |
| 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, ...) |
| { |
| return 0; |
| } |
| static inline int |
| ftrace_vprintk(const char *fmt, va_list ap) |
| { |
| return 0; |
| } |
| static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { } |
| #endif /* CONFIG_TRACING */ |
| |
| /* |
| * 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; }) |
| |
| #define min3(x, y, z) ({ \ |
| typeof(x) _min1 = (x); \ |
| typeof(y) _min2 = (y); \ |
| typeof(z) _min3 = (z); \ |
| (void) (&_min1 == &_min2); \ |
| (void) (&_min1 == &_min3); \ |
| _min1 < _min2 ? (_min1 < _min3 ? _min1 : _min3) : \ |
| (_min2 < _min3 ? _min2 : _min3); }) |
| |
| #define max3(x, y, z) ({ \ |
| typeof(x) _max1 = (x); \ |
| typeof(y) _max2 = (y); \ |
| typeof(z) _max3 = (z); \ |
| (void) (&_max1 == &_max2); \ |
| (void) (&_max1 == &_max3); \ |
| _max1 > _max2 ? (_max1 > _max3 ? _max1 : _max3) : \ |
| (_max2 > _max3 ? _max2 : _max3); }) |
| |
| /** |
| * min_not_zero - return the minimum that is _not_ zero, unless both are zero |
| * @x: value1 |
| * @y: value2 |
| */ |
| #define min_not_zero(x, y) ({ \ |
| typeof(x) __x = (x); \ |
| typeof(y) __y = (y); \ |
| __x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); }) |
| |
| /** |
| * 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; }) |
| |
| |
| /* |
| * swap - swap value of @a and @b |
| */ |
| #define swap(a, b) \ |
| do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0) |
| |
| /** |
| * 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) );}) |
| |
| /* 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 |
| |
| /* This helps us avoid #ifdef CONFIG_COMPACTION */ |
| #ifdef CONFIG_COMPACTION |
| #define COMPACTION_BUILD 1 |
| #else |
| #define COMPACTION_BUILD 0 |
| #endif |
| |
| /* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */ |
| #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
| # define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD |
| #endif |
| |
| extern int do_sysinfo(struct sysinfo *info); |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif |