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Commit | Line | Data |
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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 | |
2da96acd JA |
49 | #ifdef CONFIG_LBD |
50 | # include <asm/div64.h> | |
51 | # define sector_div(a, b) do_div(a, b) | |
52 | #else | |
53 | # define sector_div(n, b)( \ | |
54 | { \ | |
55 | int _res; \ | |
56 | _res = (n) % (b); \ | |
57 | (n) /= (b); \ | |
58 | _res; \ | |
59 | } \ | |
60 | ) | |
61 | #endif | |
62 | ||
218e180e AM |
63 | /** |
64 | * upper_32_bits - return bits 32-63 of a number | |
65 | * @n: the number we're accessing | |
66 | * | |
67 | * A basic shift-right of a 64- or 32-bit quantity. Use this to suppress | |
68 | * the "right shift count >= width of type" warning when that quantity is | |
69 | * 32-bits. | |
70 | */ | |
71 | #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16)) | |
72 | ||
1da177e4 LT |
73 | #define KERN_EMERG "<0>" /* system is unusable */ |
74 | #define KERN_ALERT "<1>" /* action must be taken immediately */ | |
75 | #define KERN_CRIT "<2>" /* critical conditions */ | |
76 | #define KERN_ERR "<3>" /* error conditions */ | |
77 | #define KERN_WARNING "<4>" /* warning conditions */ | |
78 | #define KERN_NOTICE "<5>" /* normal but significant condition */ | |
79 | #define KERN_INFO "<6>" /* informational */ | |
80 | #define KERN_DEBUG "<7>" /* debug-level messages */ | |
81 | ||
47492527 IM |
82 | /* |
83 | * Annotation for a "continued" line of log printout (only done after a | |
84 | * line that had no enclosing \n). Only to be used by core/arch code | |
85 | * during early bootup (a continued line is not SMP-safe otherwise). | |
86 | */ | |
87 | #define KERN_CONT "" | |
88 | ||
1da177e4 LT |
89 | extern int console_printk[]; |
90 | ||
91 | #define console_loglevel (console_printk[0]) | |
92 | #define default_message_loglevel (console_printk[1]) | |
93 | #define minimum_console_loglevel (console_printk[2]) | |
94 | #define default_console_loglevel (console_printk[3]) | |
95 | ||
96 | struct completion; | |
df2e71fb | 97 | struct pt_regs; |
98 | struct user; | |
1da177e4 LT |
99 | |
100 | /** | |
101 | * might_sleep - annotation for functions that can sleep | |
102 | * | |
103 | * this macro will print a stack trace if it is executed in an atomic | |
104 | * context (spinlock, irq-handler, ...). | |
105 | * | |
106 | * This is a useful debugging help to be able to catch problems early and not | |
e20ec991 | 107 | * be bitten later when the calling function happens to sleep when it is not |
1da177e4 LT |
108 | * supposed to. |
109 | */ | |
f8cbd99b | 110 | #ifdef CONFIG_PREEMPT_VOLUNTARY |
02b67cc3 HX |
111 | extern int _cond_resched(void); |
112 | # define might_resched() _cond_resched() | |
f8cbd99b IM |
113 | #else |
114 | # define might_resched() do { } while (0) | |
115 | #endif | |
116 | ||
1da177e4 | 117 | #ifdef CONFIG_DEBUG_SPINLOCK_SLEEP |
f8cbd99b IM |
118 | void __might_sleep(char *file, int line); |
119 | # define might_sleep() \ | |
120 | do { __might_sleep(__FILE__, __LINE__); might_resched(); } while (0) | |
1da177e4 | 121 | #else |
f8cbd99b | 122 | # define might_sleep() do { might_resched(); } while (0) |
1da177e4 LT |
123 | #endif |
124 | ||
368a5fa1 | 125 | #define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0) |
f8cbd99b | 126 | |
1da177e4 LT |
127 | #define abs(x) ({ \ |
128 | int __x = (x); \ | |
129 | (__x < 0) ? -__x : __x; \ | |
130 | }) | |
131 | ||
e041c683 | 132 | extern struct atomic_notifier_head panic_notifier_list; |
1da177e4 LT |
133 | extern long (*panic_blink)(long time); |
134 | NORET_TYPE void panic(const char * fmt, ...) | |
a586df06 | 135 | __attribute__ ((NORET_AND format (printf, 1, 2))) __cold; |
dd287796 AM |
136 | extern void oops_enter(void); |
137 | extern void oops_exit(void); | |
138 | extern int oops_may_print(void); | |
ec701584 | 139 | NORET_TYPE void do_exit(long error_code) |
1da177e4 LT |
140 | ATTRIB_NORET; |
141 | NORET_TYPE void complete_and_exit(struct completion *, long) | |
142 | ATTRIB_NORET; | |
143 | extern unsigned long simple_strtoul(const char *,char **,unsigned int); | |
144 | extern long simple_strtol(const char *,char **,unsigned int); | |
145 | extern unsigned long long simple_strtoull(const char *,char **,unsigned int); | |
146 | extern long long simple_strtoll(const char *,char **,unsigned int); | |
06b2a76d YY |
147 | extern int strict_strtoul(const char *, unsigned int, unsigned long *); |
148 | extern int strict_strtol(const char *, unsigned int, long *); | |
149 | extern int strict_strtoull(const char *, unsigned int, unsigned long long *); | |
150 | extern int strict_strtoll(const char *, unsigned int, long long *); | |
1da177e4 LT |
151 | extern int sprintf(char * buf, const char * fmt, ...) |
152 | __attribute__ ((format (printf, 2, 3))); | |
153 | extern int vsprintf(char *buf, const char *, va_list) | |
154 | __attribute__ ((format (printf, 2, 0))); | |
155 | extern int snprintf(char * buf, size_t size, const char * fmt, ...) | |
156 | __attribute__ ((format (printf, 3, 4))); | |
157 | extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
158 | __attribute__ ((format (printf, 3, 0))); | |
159 | extern int scnprintf(char * buf, size_t size, const char * fmt, ...) | |
160 | __attribute__ ((format (printf, 3, 4))); | |
161 | extern int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
162 | __attribute__ ((format (printf, 3, 0))); | |
e905914f JF |
163 | extern char *kasprintf(gfp_t gfp, const char *fmt, ...) |
164 | __attribute__ ((format (printf, 2, 3))); | |
11443ec7 | 165 | extern char *kvasprintf(gfp_t gfp, const char *fmt, va_list args); |
1da177e4 LT |
166 | |
167 | extern int sscanf(const char *, const char *, ...) | |
168 | __attribute__ ((format (scanf, 2, 3))); | |
169 | extern int vsscanf(const char *, const char *, va_list) | |
170 | __attribute__ ((format (scanf, 2, 0))); | |
171 | ||
172 | extern int get_option(char **str, int *pint); | |
173 | extern char *get_options(const char *str, int nints, int *ints); | |
174 | extern unsigned long long memparse(char *ptr, char **retptr); | |
175 | ||
5e376613 | 176 | extern int core_kernel_text(unsigned long addr); |
1da177e4 LT |
177 | extern int __kernel_text_address(unsigned long addr); |
178 | extern int kernel_text_address(unsigned long addr); | |
04a2e6a5 EB |
179 | struct pid; |
180 | extern struct pid *session_of_pgrp(struct pid *pgrp); | |
1da177e4 | 181 | |
d59745ce | 182 | #ifdef CONFIG_PRINTK |
1da177e4 LT |
183 | asmlinkage int vprintk(const char *fmt, va_list args) |
184 | __attribute__ ((format (printf, 1, 0))); | |
185 | asmlinkage int printk(const char * fmt, ...) | |
a586df06 | 186 | __attribute__ ((format (printf, 1, 2))) __cold; |
0b15d04a MF |
187 | extern int log_buf_get_len(void); |
188 | extern int log_buf_read(int idx); | |
189 | extern int log_buf_copy(char *dest, int idx, int len); | |
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; } |
0b15d04a MF |
205 | static inline int log_buf_get_len(void) { return 0; } |
206 | static inline int log_buf_read(int idx) { return 0; } | |
207 | static inline int log_buf_copy(char *dest, int idx, int len) { return 0; } | |
7ef3d2fd JP |
208 | static inline int printk_ratelimit(void) { return 0; } |
209 | static inline int __printk_ratelimit(int ratelimit_jiffies, \ | |
210 | int ratelimit_burst) { return 0; } | |
211 | static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, \ | |
212 | unsigned int interval_msec) \ | |
213 | { return false; } | |
d59745ce | 214 | #endif |
1da177e4 | 215 | |
076f9776 IM |
216 | extern void __attribute__((format(printf, 1, 2))) |
217 | early_printk(const char *fmt, ...); | |
218 | ||
1da177e4 LT |
219 | unsigned long int_sqrt(unsigned long); |
220 | ||
1da177e4 LT |
221 | static inline void console_silent(void) |
222 | { | |
223 | console_loglevel = 0; | |
224 | } | |
225 | ||
226 | static inline void console_verbose(void) | |
227 | { | |
228 | if (console_loglevel) | |
229 | console_loglevel = 15; | |
230 | } | |
231 | ||
232 | extern void bust_spinlocks(int yes); | |
e3e8a75d | 233 | extern void wake_up_klogd(void); |
1da177e4 | 234 | extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */ |
aa727107 | 235 | extern int panic_timeout; |
1da177e4 | 236 | extern int panic_on_oops; |
8da5adda | 237 | extern int panic_on_unrecovered_nmi; |
1da177e4 LT |
238 | extern int tainted; |
239 | extern const char *print_tainted(void); | |
240 | extern void add_taint(unsigned); | |
b920de1b | 241 | extern int root_mountflags; |
1da177e4 LT |
242 | |
243 | /* Values used for system_state */ | |
244 | extern enum system_states { | |
245 | SYSTEM_BOOTING, | |
246 | SYSTEM_RUNNING, | |
247 | SYSTEM_HALT, | |
248 | SYSTEM_POWER_OFF, | |
249 | SYSTEM_RESTART, | |
729b4d4c | 250 | SYSTEM_SUSPEND_DISK, |
1da177e4 LT |
251 | } system_state; |
252 | ||
253 | #define TAINT_PROPRIETARY_MODULE (1<<0) | |
254 | #define TAINT_FORCED_MODULE (1<<1) | |
255 | #define TAINT_UNSAFE_SMP (1<<2) | |
256 | #define TAINT_FORCED_RMMOD (1<<3) | |
257 | #define TAINT_MACHINE_CHECK (1<<4) | |
258 | #define TAINT_BAD_PAGE (1<<5) | |
34f5a398 | 259 | #define TAINT_USER (1<<6) |
bcdcd8e7 | 260 | #define TAINT_DIE (1<<7) |
6ed31e92 | 261 | #define TAINT_OVERRIDDEN_ACPI_TABLE (1<<8) |
95b570c9 | 262 | #define TAINT_WARN (1<<9) |
1da177e4 | 263 | |
a586df06 | 264 | extern void dump_stack(void) __cold; |
1da177e4 | 265 | |
99eaf3c4 RD |
266 | enum { |
267 | DUMP_PREFIX_NONE, | |
268 | DUMP_PREFIX_ADDRESS, | |
269 | DUMP_PREFIX_OFFSET | |
270 | }; | |
c7909234 RD |
271 | extern void hex_dump_to_buffer(const void *buf, size_t len, |
272 | int rowsize, int groupsize, | |
273 | char *linebuf, size_t linebuflen, bool ascii); | |
274 | extern void print_hex_dump(const char *level, const char *prefix_str, | |
275 | int prefix_type, int rowsize, int groupsize, | |
6a0ed91e | 276 | const void *buf, size_t len, bool ascii); |
c7909234 | 277 | extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type, |
eb9a9a56 | 278 | const void *buf, size_t len); |
99eaf3c4 RD |
279 | #define hex_asc(x) "0123456789abcdef"[x] |
280 | ||
1f7c8234 EM |
281 | #define pr_emerg(fmt, arg...) \ |
282 | printk(KERN_EMERG fmt, ##arg) | |
283 | #define pr_alert(fmt, arg...) \ | |
284 | printk(KERN_ALERT fmt, ##arg) | |
285 | #define pr_crit(fmt, arg...) \ | |
286 | printk(KERN_CRIT fmt, ##arg) | |
287 | #define pr_err(fmt, arg...) \ | |
288 | printk(KERN_ERR fmt, ##arg) | |
289 | #define pr_warning(fmt, arg...) \ | |
290 | printk(KERN_WARNING fmt, ##arg) | |
291 | #define pr_notice(fmt, arg...) \ | |
292 | printk(KERN_NOTICE fmt, ##arg) | |
293 | #define pr_info(fmt, arg...) \ | |
294 | printk(KERN_INFO fmt, ##arg) | |
295 | ||
1da177e4 | 296 | #ifdef DEBUG |
1cc6daf2 | 297 | /* If you are writing a driver, please use dev_dbg instead */ |
1f7c8234 EM |
298 | #define pr_debug(fmt, arg...) \ |
299 | printk(KERN_DEBUG fmt, ##arg) | |
1da177e4 | 300 | #else |
1429db83 JP |
301 | #define pr_debug(fmt, arg...) \ |
302 | ({ if (0) printk(KERN_DEBUG fmt, ##arg); 0; }) | |
1da177e4 LT |
303 | #endif |
304 | ||
1da177e4 LT |
305 | /* |
306 | * Display an IP address in readable format. | |
307 | */ | |
308 | ||
309 | #define NIPQUAD(addr) \ | |
310 | ((unsigned char *)&addr)[0], \ | |
311 | ((unsigned char *)&addr)[1], \ | |
312 | ((unsigned char *)&addr)[2], \ | |
313 | ((unsigned char *)&addr)[3] | |
46b86a2d | 314 | #define NIPQUAD_FMT "%u.%u.%u.%u" |
1da177e4 LT |
315 | |
316 | #define NIP6(addr) \ | |
317 | ntohs((addr).s6_addr16[0]), \ | |
318 | ntohs((addr).s6_addr16[1]), \ | |
319 | ntohs((addr).s6_addr16[2]), \ | |
320 | ntohs((addr).s6_addr16[3]), \ | |
321 | ntohs((addr).s6_addr16[4]), \ | |
322 | ntohs((addr).s6_addr16[5]), \ | |
323 | ntohs((addr).s6_addr16[6]), \ | |
324 | ntohs((addr).s6_addr16[7]) | |
46b86a2d | 325 | #define NIP6_FMT "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x" |
9343e79a | 326 | #define NIP6_SEQFMT "%04x%04x%04x%04x%04x%04x%04x%04x" |
1da177e4 LT |
327 | |
328 | #if defined(__LITTLE_ENDIAN) | |
329 | #define HIPQUAD(addr) \ | |
330 | ((unsigned char *)&addr)[3], \ | |
331 | ((unsigned char *)&addr)[2], \ | |
332 | ((unsigned char *)&addr)[1], \ | |
333 | ((unsigned char *)&addr)[0] | |
334 | #elif defined(__BIG_ENDIAN) | |
335 | #define HIPQUAD NIPQUAD | |
336 | #else | |
337 | #error "Please fix asm/byteorder.h" | |
338 | #endif /* __LITTLE_ENDIAN */ | |
339 | ||
340 | /* | |
bdf4bbaa | 341 | * min()/max()/clamp() macros that also do |
1da177e4 LT |
342 | * strict type-checking.. See the |
343 | * "unnecessary" pointer comparison. | |
344 | */ | |
bdf4bbaa HH |
345 | #define min(x, y) ({ \ |
346 | typeof(x) _min1 = (x); \ | |
347 | typeof(y) _min2 = (y); \ | |
348 | (void) (&_min1 == &_min2); \ | |
349 | _min1 < _min2 ? _min1 : _min2; }) | |
350 | ||
351 | #define max(x, y) ({ \ | |
352 | typeof(x) _max1 = (x); \ | |
353 | typeof(y) _max2 = (y); \ | |
354 | (void) (&_max1 == &_max2); \ | |
355 | _max1 > _max2 ? _max1 : _max2; }) | |
356 | ||
357 | /** | |
358 | * clamp - return a value clamped to a given range with strict typechecking | |
359 | * @val: current value | |
360 | * @min: minimum allowable value | |
361 | * @max: maximum allowable value | |
362 | * | |
363 | * This macro does strict typechecking of min/max to make sure they are of the | |
364 | * same type as val. See the unnecessary pointer comparisons. | |
365 | */ | |
366 | #define clamp(val, min, max) ({ \ | |
367 | typeof(val) __val = (val); \ | |
368 | typeof(min) __min = (min); \ | |
369 | typeof(max) __max = (max); \ | |
370 | (void) (&__val == &__min); \ | |
371 | (void) (&__val == &__max); \ | |
372 | __val = __val < __min ? __min: __val; \ | |
373 | __val > __max ? __max: __val; }) | |
1da177e4 LT |
374 | |
375 | /* | |
376 | * ..and if you can't take the strict | |
377 | * types, you can specify one yourself. | |
378 | * | |
bdf4bbaa HH |
379 | * Or not use min/max/clamp at all, of course. |
380 | */ | |
381 | #define min_t(type, x, y) ({ \ | |
382 | type __min1 = (x); \ | |
383 | type __min2 = (y); \ | |
384 | __min1 < __min2 ? __min1: __min2; }) | |
385 | ||
386 | #define max_t(type, x, y) ({ \ | |
387 | type __max1 = (x); \ | |
388 | type __max2 = (y); \ | |
389 | __max1 > __max2 ? __max1: __max2; }) | |
390 | ||
391 | /** | |
392 | * clamp_t - return a value clamped to a given range using a given type | |
393 | * @type: the type of variable to use | |
394 | * @val: current value | |
395 | * @min: minimum allowable value | |
396 | * @max: maximum allowable value | |
397 | * | |
398 | * This macro does no typechecking and uses temporary variables of type | |
399 | * 'type' to make all the comparisons. | |
1da177e4 | 400 | */ |
bdf4bbaa HH |
401 | #define clamp_t(type, val, min, max) ({ \ |
402 | type __val = (val); \ | |
403 | type __min = (min); \ | |
404 | type __max = (max); \ | |
405 | __val = __val < __min ? __min: __val; \ | |
406 | __val > __max ? __max: __val; }) | |
1da177e4 | 407 | |
bdf4bbaa HH |
408 | /** |
409 | * clamp_val - return a value clamped to a given range using val's type | |
410 | * @val: current value | |
411 | * @min: minimum allowable value | |
412 | * @max: maximum allowable value | |
413 | * | |
414 | * This macro does no typechecking and uses temporary variables of whatever | |
415 | * type the input argument 'val' is. This is useful when val is an unsigned | |
416 | * type and min and max are literals that will otherwise be assigned a signed | |
417 | * integer type. | |
418 | */ | |
419 | #define clamp_val(val, min, max) ({ \ | |
420 | typeof(val) __val = (val); \ | |
421 | typeof(val) __min = (min); \ | |
422 | typeof(val) __max = (max); \ | |
423 | __val = __val < __min ? __min: __val; \ | |
424 | __val > __max ? __max: __val; }) | |
1da177e4 LT |
425 | |
426 | /** | |
427 | * container_of - cast a member of a structure out to the containing structure | |
1da177e4 LT |
428 | * @ptr: the pointer to the member. |
429 | * @type: the type of the container struct this is embedded in. | |
430 | * @member: the name of the member within the struct. | |
431 | * | |
432 | */ | |
433 | #define container_of(ptr, type, member) ({ \ | |
78db2ad6 DW |
434 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
435 | (type *)( (char *)__mptr - offsetof(type,member) );}) | |
1da177e4 LT |
436 | |
437 | /* | |
438 | * Check at compile time that something is of a particular type. | |
439 | * Always evaluates to 1 so you may use it easily in comparisons. | |
440 | */ | |
441 | #define typecheck(type,x) \ | |
442 | ({ type __dummy; \ | |
443 | typeof(x) __dummy2; \ | |
444 | (void)(&__dummy == &__dummy2); \ | |
445 | 1; \ | |
446 | }) | |
447 | ||
711a660d CE |
448 | /* |
449 | * Check at compile time that 'function' is a certain type, or is a pointer | |
450 | * to that type (needs to use typedef for the function type.) | |
451 | */ | |
452 | #define typecheck_fn(type,function) \ | |
453 | ({ typeof(type) __tmp = function; \ | |
454 | (void)__tmp; \ | |
455 | }) | |
456 | ||
d4d23add KM |
457 | struct sysinfo; |
458 | extern int do_sysinfo(struct sysinfo *info); | |
459 | ||
1da177e4 LT |
460 | #endif /* __KERNEL__ */ |
461 | ||
462 | #define SI_LOAD_SHIFT 16 | |
463 | struct sysinfo { | |
464 | long uptime; /* Seconds since boot */ | |
465 | unsigned long loads[3]; /* 1, 5, and 15 minute load averages */ | |
466 | unsigned long totalram; /* Total usable main memory size */ | |
467 | unsigned long freeram; /* Available memory size */ | |
468 | unsigned long sharedram; /* Amount of shared memory */ | |
469 | unsigned long bufferram; /* Memory used by buffers */ | |
470 | unsigned long totalswap; /* Total swap space size */ | |
471 | unsigned long freeswap; /* swap space still available */ | |
472 | unsigned short procs; /* Number of current processes */ | |
473 | unsigned short pad; /* explicit padding for m68k */ | |
474 | unsigned long totalhigh; /* Total high memory size */ | |
475 | unsigned long freehigh; /* Available high memory size */ | |
476 | unsigned int mem_unit; /* Memory unit size in bytes */ | |
477 | char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */ | |
478 | }; | |
479 | ||
c0398ee6 | 480 | /* Force a compilation error if condition is true */ |
921717a2 | 481 | #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) |
1da177e4 | 482 | |
4552d5dc JB |
483 | /* Force a compilation error if condition is true, but also produce a |
484 | result (of value 0 and type size_t), so the expression can be used | |
485 | e.g. in a structure initializer (or where-ever else comma expressions | |
486 | aren't permitted). */ | |
487 | #define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1) | |
488 | ||
1da177e4 | 489 | /* Trap pasters of __FUNCTION__ at compile-time */ |
1da177e4 | 490 | #define __FUNCTION__ (__func__) |
1da177e4 | 491 | |
08e0f6a9 CL |
492 | /* This helps us to avoid #ifdef CONFIG_NUMA */ |
493 | #ifdef CONFIG_NUMA | |
494 | #define NUMA_BUILD 1 | |
495 | #else | |
496 | #define NUMA_BUILD 0 | |
497 | #endif | |
498 | ||
1da177e4 | 499 | #endif |