Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _LINUX_KERNEL_H |
2 | #define _LINUX_KERNEL_H | |
3 | ||
4 | /* | |
5 | * 'kernel.h' contains some often-used function prototypes etc | |
6 | */ | |
7 | ||
8 | #ifdef __KERNEL__ | |
9 | ||
10 | #include <stdarg.h> | |
11 | #include <linux/linkage.h> | |
12 | #include <linux/stddef.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/compiler.h> | |
15 | #include <linux/bitops.h> | |
f0d1b0b3 | 16 | #include <linux/log2.h> |
1da177e4 LT |
17 | #include <asm/byteorder.h> |
18 | #include <asm/bug.h> | |
19 | ||
3eb3c740 RZ |
20 | extern const char linux_banner[]; |
21 | extern const char linux_proc_banner[]; | |
22 | ||
44f564a4 ZY |
23 | #define USHORT_MAX ((u16)(~0U)) |
24 | #define SHORT_MAX ((s16)(USHORT_MAX>>1)) | |
25 | #define SHORT_MIN (-SHORT_MAX - 1) | |
1da177e4 LT |
26 | #define INT_MAX ((int)(~0U>>1)) |
27 | #define INT_MIN (-INT_MAX - 1) | |
28 | #define UINT_MAX (~0U) | |
29 | #define LONG_MAX ((long)(~0UL>>1)) | |
30 | #define LONG_MIN (-LONG_MAX - 1) | |
31 | #define ULONG_MAX (~0UL) | |
111ebb6e OH |
32 | #define LLONG_MAX ((long long)(~0ULL>>1)) |
33 | #define LLONG_MIN (-LLONG_MAX - 1) | |
34 | #define ULLONG_MAX (~0ULL) | |
1da177e4 LT |
35 | |
36 | #define STACK_MAGIC 0xdeadbeef | |
37 | ||
2ea58144 LT |
38 | #define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1) |
39 | #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) | |
a83308e6 | 40 | #define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a))) |
f10db627 | 41 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) |
2ea58144 | 42 | |
c5e631cf RR |
43 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) |
44 | ||
4552d5dc | 45 | #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f)) |
930631ed | 46 | #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) |
b4cac1a0 | 47 | #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y)) |
1da177e4 | 48 | |
ca31e146 EGM |
49 | #define _RET_IP_ (unsigned long)__builtin_return_address(0) |
50 | #define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; }) | |
51 | ||
2da96acd JA |
52 | #ifdef CONFIG_LBD |
53 | # include <asm/div64.h> | |
54 | # define sector_div(a, b) do_div(a, b) | |
55 | #else | |
56 | # define sector_div(n, b)( \ | |
57 | { \ | |
58 | int _res; \ | |
59 | _res = (n) % (b); \ | |
60 | (n) /= (b); \ | |
61 | _res; \ | |
62 | } \ | |
63 | ) | |
64 | #endif | |
65 | ||
218e180e AM |
66 | /** |
67 | * upper_32_bits - return bits 32-63 of a number | |
68 | * @n: the number we're accessing | |
69 | * | |
70 | * A basic shift-right of a 64- or 32-bit quantity. Use this to suppress | |
71 | * the "right shift count >= width of type" warning when that quantity is | |
72 | * 32-bits. | |
73 | */ | |
74 | #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16)) | |
75 | ||
1da177e4 LT |
76 | #define KERN_EMERG "<0>" /* system is unusable */ |
77 | #define KERN_ALERT "<1>" /* action must be taken immediately */ | |
78 | #define KERN_CRIT "<2>" /* critical conditions */ | |
79 | #define KERN_ERR "<3>" /* error conditions */ | |
80 | #define KERN_WARNING "<4>" /* warning conditions */ | |
81 | #define KERN_NOTICE "<5>" /* normal but significant condition */ | |
82 | #define KERN_INFO "<6>" /* informational */ | |
83 | #define KERN_DEBUG "<7>" /* debug-level messages */ | |
84 | ||
47492527 IM |
85 | /* |
86 | * Annotation for a "continued" line of log printout (only done after a | |
87 | * line that had no enclosing \n). Only to be used by core/arch code | |
88 | * during early bootup (a continued line is not SMP-safe otherwise). | |
89 | */ | |
90 | #define KERN_CONT "" | |
91 | ||
1da177e4 LT |
92 | extern int console_printk[]; |
93 | ||
94 | #define console_loglevel (console_printk[0]) | |
95 | #define default_message_loglevel (console_printk[1]) | |
96 | #define minimum_console_loglevel (console_printk[2]) | |
97 | #define default_console_loglevel (console_printk[3]) | |
98 | ||
99 | struct completion; | |
df2e71fb | 100 | struct pt_regs; |
101 | struct user; | |
1da177e4 LT |
102 | |
103 | /** | |
104 | * might_sleep - annotation for functions that can sleep | |
105 | * | |
106 | * this macro will print a stack trace if it is executed in an atomic | |
107 | * context (spinlock, irq-handler, ...). | |
108 | * | |
109 | * This is a useful debugging help to be able to catch problems early and not | |
e20ec991 | 110 | * be bitten later when the calling function happens to sleep when it is not |
1da177e4 LT |
111 | * supposed to. |
112 | */ | |
f8cbd99b | 113 | #ifdef CONFIG_PREEMPT_VOLUNTARY |
02b67cc3 HX |
114 | extern int _cond_resched(void); |
115 | # define might_resched() _cond_resched() | |
f8cbd99b IM |
116 | #else |
117 | # define might_resched() do { } while (0) | |
118 | #endif | |
119 | ||
1da177e4 | 120 | #ifdef CONFIG_DEBUG_SPINLOCK_SLEEP |
f8cbd99b IM |
121 | void __might_sleep(char *file, int line); |
122 | # define might_sleep() \ | |
123 | do { __might_sleep(__FILE__, __LINE__); might_resched(); } while (0) | |
1da177e4 | 124 | #else |
f8cbd99b | 125 | # define might_sleep() do { might_resched(); } while (0) |
1da177e4 LT |
126 | #endif |
127 | ||
368a5fa1 | 128 | #define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0) |
f8cbd99b | 129 | |
1da177e4 LT |
130 | #define abs(x) ({ \ |
131 | int __x = (x); \ | |
132 | (__x < 0) ? -__x : __x; \ | |
133 | }) | |
134 | ||
e041c683 | 135 | extern struct atomic_notifier_head panic_notifier_list; |
1da177e4 LT |
136 | extern long (*panic_blink)(long time); |
137 | NORET_TYPE void panic(const char * fmt, ...) | |
a586df06 | 138 | __attribute__ ((NORET_AND format (printf, 1, 2))) __cold; |
dd287796 AM |
139 | extern void oops_enter(void); |
140 | extern void oops_exit(void); | |
141 | extern int oops_may_print(void); | |
ec701584 | 142 | NORET_TYPE void do_exit(long error_code) |
1da177e4 LT |
143 | ATTRIB_NORET; |
144 | NORET_TYPE void complete_and_exit(struct completion *, long) | |
145 | ATTRIB_NORET; | |
146 | extern unsigned long simple_strtoul(const char *,char **,unsigned int); | |
147 | extern long simple_strtol(const char *,char **,unsigned int); | |
148 | extern unsigned long long simple_strtoull(const char *,char **,unsigned int); | |
149 | extern long long simple_strtoll(const char *,char **,unsigned int); | |
06b2a76d YY |
150 | extern int strict_strtoul(const char *, unsigned int, unsigned long *); |
151 | extern int strict_strtol(const char *, unsigned int, long *); | |
152 | extern int strict_strtoull(const char *, unsigned int, unsigned long long *); | |
153 | extern int strict_strtoll(const char *, unsigned int, long long *); | |
1da177e4 LT |
154 | extern int sprintf(char * buf, const char * fmt, ...) |
155 | __attribute__ ((format (printf, 2, 3))); | |
156 | extern int vsprintf(char *buf, const char *, va_list) | |
157 | __attribute__ ((format (printf, 2, 0))); | |
158 | extern int snprintf(char * buf, size_t size, const char * fmt, ...) | |
159 | __attribute__ ((format (printf, 3, 4))); | |
160 | extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
161 | __attribute__ ((format (printf, 3, 0))); | |
162 | extern int scnprintf(char * buf, size_t size, const char * fmt, ...) | |
163 | __attribute__ ((format (printf, 3, 4))); | |
164 | extern int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
165 | __attribute__ ((format (printf, 3, 0))); | |
e905914f JF |
166 | extern char *kasprintf(gfp_t gfp, const char *fmt, ...) |
167 | __attribute__ ((format (printf, 2, 3))); | |
11443ec7 | 168 | extern char *kvasprintf(gfp_t gfp, const char *fmt, va_list args); |
1da177e4 LT |
169 | |
170 | extern int sscanf(const char *, const char *, ...) | |
171 | __attribute__ ((format (scanf, 2, 3))); | |
172 | extern int vsscanf(const char *, const char *, va_list) | |
173 | __attribute__ ((format (scanf, 2, 0))); | |
174 | ||
175 | extern int get_option(char **str, int *pint); | |
176 | extern char *get_options(const char *str, int nints, int *ints); | |
177 | extern unsigned long long memparse(char *ptr, char **retptr); | |
178 | ||
5e376613 | 179 | extern int core_kernel_text(unsigned long addr); |
1da177e4 LT |
180 | extern int __kernel_text_address(unsigned long addr); |
181 | extern int kernel_text_address(unsigned long addr); | |
04a2e6a5 EB |
182 | struct pid; |
183 | extern struct pid *session_of_pgrp(struct pid *pgrp); | |
1da177e4 | 184 | |
d59745ce | 185 | #ifdef CONFIG_PRINTK |
1da177e4 LT |
186 | asmlinkage int vprintk(const char *fmt, va_list args) |
187 | __attribute__ ((format (printf, 1, 0))); | |
188 | asmlinkage int printk(const char * fmt, ...) | |
a586df06 | 189 | __attribute__ ((format (printf, 1, 2))) __cold; |
7ef3d2fd JP |
190 | |
191 | extern int printk_ratelimit_jiffies; | |
192 | extern int printk_ratelimit_burst; | |
193 | extern int printk_ratelimit(void); | |
5f97a5a8 | 194 | extern int __ratelimit(int ratelimit_jiffies, int ratelimit_burst); |
7ef3d2fd JP |
195 | extern int __printk_ratelimit(int ratelimit_jiffies, int ratelimit_burst); |
196 | extern bool printk_timed_ratelimit(unsigned long *caller_jiffies, | |
197 | unsigned int interval_msec); | |
d59745ce MM |
198 | #else |
199 | static inline int vprintk(const char *s, va_list args) | |
200 | __attribute__ ((format (printf, 1, 0))); | |
201 | static inline int vprintk(const char *s, va_list args) { return 0; } | |
202 | static inline int printk(const char *s, ...) | |
203 | __attribute__ ((format (printf, 1, 2))); | |
a586df06 | 204 | static inline int __cold printk(const char *s, ...) { return 0; } |
7ef3d2fd JP |
205 | static inline int printk_ratelimit(void) { return 0; } |
206 | static inline int __printk_ratelimit(int ratelimit_jiffies, \ | |
207 | int ratelimit_burst) { return 0; } | |
208 | static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, \ | |
209 | unsigned int interval_msec) \ | |
210 | { return false; } | |
d59745ce | 211 | #endif |
1da177e4 | 212 | |
e17ba73b | 213 | extern void asmlinkage __attribute__((format(printf, 1, 2))) |
076f9776 IM |
214 | early_printk(const char *fmt, ...); |
215 | ||
1da177e4 LT |
216 | unsigned long int_sqrt(unsigned long); |
217 | ||
1da177e4 LT |
218 | static inline void console_silent(void) |
219 | { | |
220 | console_loglevel = 0; | |
221 | } | |
222 | ||
223 | static inline void console_verbose(void) | |
224 | { | |
225 | if (console_loglevel) | |
226 | console_loglevel = 15; | |
227 | } | |
228 | ||
229 | extern void bust_spinlocks(int yes); | |
e3e8a75d | 230 | extern void wake_up_klogd(void); |
1da177e4 | 231 | extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */ |
aa727107 | 232 | extern int panic_timeout; |
1da177e4 | 233 | extern int panic_on_oops; |
8da5adda | 234 | extern int panic_on_unrecovered_nmi; |
1da177e4 LT |
235 | extern int tainted; |
236 | extern const char *print_tainted(void); | |
237 | extern void add_taint(unsigned); | |
b920de1b | 238 | extern int root_mountflags; |
1da177e4 LT |
239 | |
240 | /* Values used for system_state */ | |
241 | extern enum system_states { | |
242 | SYSTEM_BOOTING, | |
243 | SYSTEM_RUNNING, | |
244 | SYSTEM_HALT, | |
245 | SYSTEM_POWER_OFF, | |
246 | SYSTEM_RESTART, | |
729b4d4c | 247 | SYSTEM_SUSPEND_DISK, |
1da177e4 LT |
248 | } system_state; |
249 | ||
250 | #define TAINT_PROPRIETARY_MODULE (1<<0) | |
251 | #define TAINT_FORCED_MODULE (1<<1) | |
252 | #define TAINT_UNSAFE_SMP (1<<2) | |
253 | #define TAINT_FORCED_RMMOD (1<<3) | |
254 | #define TAINT_MACHINE_CHECK (1<<4) | |
255 | #define TAINT_BAD_PAGE (1<<5) | |
34f5a398 | 256 | #define TAINT_USER (1<<6) |
bcdcd8e7 | 257 | #define TAINT_DIE (1<<7) |
6ed31e92 | 258 | #define TAINT_OVERRIDDEN_ACPI_TABLE (1<<8) |
95b570c9 | 259 | #define TAINT_WARN (1<<9) |
1da177e4 | 260 | |
a586df06 | 261 | extern void dump_stack(void) __cold; |
1da177e4 | 262 | |
99eaf3c4 RD |
263 | enum { |
264 | DUMP_PREFIX_NONE, | |
265 | DUMP_PREFIX_ADDRESS, | |
266 | DUMP_PREFIX_OFFSET | |
267 | }; | |
c7909234 RD |
268 | extern void hex_dump_to_buffer(const void *buf, size_t len, |
269 | int rowsize, int groupsize, | |
270 | char *linebuf, size_t linebuflen, bool ascii); | |
271 | extern void print_hex_dump(const char *level, const char *prefix_str, | |
272 | int prefix_type, int rowsize, int groupsize, | |
6a0ed91e | 273 | const void *buf, size_t len, bool ascii); |
c7909234 | 274 | extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type, |
eb9a9a56 | 275 | const void *buf, size_t len); |
3fc95772 HH |
276 | |
277 | extern const char hex_asc[]; | |
278 | #define hex_asc_lo(x) hex_asc[((x) & 0x0f)] | |
279 | #define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] | |
280 | ||
281 | static inline char *pack_hex_byte(char *buf, u8 byte) | |
282 | { | |
283 | *buf++ = hex_asc_hi(byte); | |
284 | *buf++ = hex_asc_lo(byte); | |
285 | return buf; | |
286 | } | |
99eaf3c4 | 287 | |
1f7c8234 EM |
288 | #define pr_emerg(fmt, arg...) \ |
289 | printk(KERN_EMERG fmt, ##arg) | |
290 | #define pr_alert(fmt, arg...) \ | |
291 | printk(KERN_ALERT fmt, ##arg) | |
292 | #define pr_crit(fmt, arg...) \ | |
293 | printk(KERN_CRIT fmt, ##arg) | |
294 | #define pr_err(fmt, arg...) \ | |
295 | printk(KERN_ERR fmt, ##arg) | |
296 | #define pr_warning(fmt, arg...) \ | |
297 | printk(KERN_WARNING fmt, ##arg) | |
298 | #define pr_notice(fmt, arg...) \ | |
299 | printk(KERN_NOTICE fmt, ##arg) | |
300 | #define pr_info(fmt, arg...) \ | |
301 | printk(KERN_INFO fmt, ##arg) | |
302 | ||
1da177e4 | 303 | #ifdef DEBUG |
1cc6daf2 | 304 | /* If you are writing a driver, please use dev_dbg instead */ |
1f7c8234 EM |
305 | #define pr_debug(fmt, arg...) \ |
306 | printk(KERN_DEBUG fmt, ##arg) | |
1da177e4 | 307 | #else |
1429db83 JP |
308 | #define pr_debug(fmt, arg...) \ |
309 | ({ if (0) printk(KERN_DEBUG fmt, ##arg); 0; }) | |
1da177e4 LT |
310 | #endif |
311 | ||
1da177e4 LT |
312 | /* |
313 | * Display an IP address in readable format. | |
314 | */ | |
315 | ||
316 | #define NIPQUAD(addr) \ | |
317 | ((unsigned char *)&addr)[0], \ | |
318 | ((unsigned char *)&addr)[1], \ | |
319 | ((unsigned char *)&addr)[2], \ | |
320 | ((unsigned char *)&addr)[3] | |
46b86a2d | 321 | #define NIPQUAD_FMT "%u.%u.%u.%u" |
1da177e4 LT |
322 | |
323 | #define NIP6(addr) \ | |
324 | ntohs((addr).s6_addr16[0]), \ | |
325 | ntohs((addr).s6_addr16[1]), \ | |
326 | ntohs((addr).s6_addr16[2]), \ | |
327 | ntohs((addr).s6_addr16[3]), \ | |
328 | ntohs((addr).s6_addr16[4]), \ | |
329 | ntohs((addr).s6_addr16[5]), \ | |
330 | ntohs((addr).s6_addr16[6]), \ | |
331 | ntohs((addr).s6_addr16[7]) | |
46b86a2d | 332 | #define NIP6_FMT "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x" |
9343e79a | 333 | #define NIP6_SEQFMT "%04x%04x%04x%04x%04x%04x%04x%04x" |
1da177e4 LT |
334 | |
335 | #if defined(__LITTLE_ENDIAN) | |
336 | #define HIPQUAD(addr) \ | |
337 | ((unsigned char *)&addr)[3], \ | |
338 | ((unsigned char *)&addr)[2], \ | |
339 | ((unsigned char *)&addr)[1], \ | |
340 | ((unsigned char *)&addr)[0] | |
341 | #elif defined(__BIG_ENDIAN) | |
342 | #define HIPQUAD NIPQUAD | |
343 | #else | |
344 | #error "Please fix asm/byteorder.h" | |
345 | #endif /* __LITTLE_ENDIAN */ | |
346 | ||
347 | /* | |
bdf4bbaa | 348 | * min()/max()/clamp() macros that also do |
1da177e4 LT |
349 | * strict type-checking.. See the |
350 | * "unnecessary" pointer comparison. | |
351 | */ | |
bdf4bbaa HH |
352 | #define min(x, y) ({ \ |
353 | typeof(x) _min1 = (x); \ | |
354 | typeof(y) _min2 = (y); \ | |
355 | (void) (&_min1 == &_min2); \ | |
356 | _min1 < _min2 ? _min1 : _min2; }) | |
357 | ||
358 | #define max(x, y) ({ \ | |
359 | typeof(x) _max1 = (x); \ | |
360 | typeof(y) _max2 = (y); \ | |
361 | (void) (&_max1 == &_max2); \ | |
362 | _max1 > _max2 ? _max1 : _max2; }) | |
363 | ||
364 | /** | |
365 | * clamp - return a value clamped to a given range with strict typechecking | |
366 | * @val: current value | |
367 | * @min: minimum allowable value | |
368 | * @max: maximum allowable value | |
369 | * | |
370 | * This macro does strict typechecking of min/max to make sure they are of the | |
371 | * same type as val. See the unnecessary pointer comparisons. | |
372 | */ | |
373 | #define clamp(val, min, max) ({ \ | |
374 | typeof(val) __val = (val); \ | |
375 | typeof(min) __min = (min); \ | |
376 | typeof(max) __max = (max); \ | |
377 | (void) (&__val == &__min); \ | |
378 | (void) (&__val == &__max); \ | |
379 | __val = __val < __min ? __min: __val; \ | |
380 | __val > __max ? __max: __val; }) | |
1da177e4 LT |
381 | |
382 | /* | |
383 | * ..and if you can't take the strict | |
384 | * types, you can specify one yourself. | |
385 | * | |
bdf4bbaa HH |
386 | * Or not use min/max/clamp at all, of course. |
387 | */ | |
388 | #define min_t(type, x, y) ({ \ | |
389 | type __min1 = (x); \ | |
390 | type __min2 = (y); \ | |
391 | __min1 < __min2 ? __min1: __min2; }) | |
392 | ||
393 | #define max_t(type, x, y) ({ \ | |
394 | type __max1 = (x); \ | |
395 | type __max2 = (y); \ | |
396 | __max1 > __max2 ? __max1: __max2; }) | |
397 | ||
398 | /** | |
399 | * clamp_t - return a value clamped to a given range using a given type | |
400 | * @type: the type of variable to use | |
401 | * @val: current value | |
402 | * @min: minimum allowable value | |
403 | * @max: maximum allowable value | |
404 | * | |
405 | * This macro does no typechecking and uses temporary variables of type | |
406 | * 'type' to make all the comparisons. | |
1da177e4 | 407 | */ |
bdf4bbaa HH |
408 | #define clamp_t(type, val, min, max) ({ \ |
409 | type __val = (val); \ | |
410 | type __min = (min); \ | |
411 | type __max = (max); \ | |
412 | __val = __val < __min ? __min: __val; \ | |
413 | __val > __max ? __max: __val; }) | |
1da177e4 | 414 | |
bdf4bbaa HH |
415 | /** |
416 | * clamp_val - return a value clamped to a given range using val's type | |
417 | * @val: current value | |
418 | * @min: minimum allowable value | |
419 | * @max: maximum allowable value | |
420 | * | |
421 | * This macro does no typechecking and uses temporary variables of whatever | |
422 | * type the input argument 'val' is. This is useful when val is an unsigned | |
423 | * type and min and max are literals that will otherwise be assigned a signed | |
424 | * integer type. | |
425 | */ | |
426 | #define clamp_val(val, min, max) ({ \ | |
427 | typeof(val) __val = (val); \ | |
428 | typeof(val) __min = (min); \ | |
429 | typeof(val) __max = (max); \ | |
430 | __val = __val < __min ? __min: __val; \ | |
431 | __val > __max ? __max: __val; }) | |
1da177e4 LT |
432 | |
433 | /** | |
434 | * container_of - cast a member of a structure out to the containing structure | |
1da177e4 LT |
435 | * @ptr: the pointer to the member. |
436 | * @type: the type of the container struct this is embedded in. | |
437 | * @member: the name of the member within the struct. | |
438 | * | |
439 | */ | |
440 | #define container_of(ptr, type, member) ({ \ | |
78db2ad6 DW |
441 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
442 | (type *)( (char *)__mptr - offsetof(type,member) );}) | |
1da177e4 LT |
443 | |
444 | /* | |
445 | * Check at compile time that something is of a particular type. | |
446 | * Always evaluates to 1 so you may use it easily in comparisons. | |
447 | */ | |
448 | #define typecheck(type,x) \ | |
449 | ({ type __dummy; \ | |
450 | typeof(x) __dummy2; \ | |
451 | (void)(&__dummy == &__dummy2); \ | |
452 | 1; \ | |
453 | }) | |
454 | ||
711a660d CE |
455 | /* |
456 | * Check at compile time that 'function' is a certain type, or is a pointer | |
457 | * to that type (needs to use typedef for the function type.) | |
458 | */ | |
459 | #define typecheck_fn(type,function) \ | |
460 | ({ typeof(type) __tmp = function; \ | |
461 | (void)__tmp; \ | |
462 | }) | |
463 | ||
d4d23add KM |
464 | struct sysinfo; |
465 | extern int do_sysinfo(struct sysinfo *info); | |
466 | ||
1da177e4 LT |
467 | #endif /* __KERNEL__ */ |
468 | ||
469 | #define SI_LOAD_SHIFT 16 | |
470 | struct sysinfo { | |
471 | long uptime; /* Seconds since boot */ | |
472 | unsigned long loads[3]; /* 1, 5, and 15 minute load averages */ | |
473 | unsigned long totalram; /* Total usable main memory size */ | |
474 | unsigned long freeram; /* Available memory size */ | |
475 | unsigned long sharedram; /* Amount of shared memory */ | |
476 | unsigned long bufferram; /* Memory used by buffers */ | |
477 | unsigned long totalswap; /* Total swap space size */ | |
478 | unsigned long freeswap; /* swap space still available */ | |
479 | unsigned short procs; /* Number of current processes */ | |
480 | unsigned short pad; /* explicit padding for m68k */ | |
481 | unsigned long totalhigh; /* Total high memory size */ | |
482 | unsigned long freehigh; /* Available high memory size */ | |
483 | unsigned int mem_unit; /* Memory unit size in bytes */ | |
484 | char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */ | |
485 | }; | |
486 | ||
c0398ee6 | 487 | /* Force a compilation error if condition is true */ |
921717a2 | 488 | #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) |
1da177e4 | 489 | |
4552d5dc JB |
490 | /* Force a compilation error if condition is true, but also produce a |
491 | result (of value 0 and type size_t), so the expression can be used | |
492 | e.g. in a structure initializer (or where-ever else comma expressions | |
493 | aren't permitted). */ | |
494 | #define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1) | |
495 | ||
1da177e4 | 496 | /* Trap pasters of __FUNCTION__ at compile-time */ |
1da177e4 | 497 | #define __FUNCTION__ (__func__) |
1da177e4 | 498 | |
08e0f6a9 CL |
499 | /* This helps us to avoid #ifdef CONFIG_NUMA */ |
500 | #ifdef CONFIG_NUMA | |
501 | #define NUMA_BUILD 1 | |
502 | #else | |
503 | #define NUMA_BUILD 0 | |
504 | #endif | |
505 | ||
1da177e4 | 506 | #endif |