diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/kernel.h |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/linux/kernel.h')
-rw-r--r-- | include/linux/kernel.h | 307 |
1 files changed, 307 insertions, 0 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h new file mode 100644 index 000000000000..7c1cba4a5278 --- /dev/null +++ b/include/linux/kernel.h | |||
@@ -0,0 +1,307 @@ | |||
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> | ||
16 | #include <asm/byteorder.h> | ||
17 | #include <asm/bug.h> | ||
18 | |||
19 | extern const char linux_banner[]; | ||
20 | |||
21 | #define INT_MAX ((int)(~0U>>1)) | ||
22 | #define INT_MIN (-INT_MAX - 1) | ||
23 | #define UINT_MAX (~0U) | ||
24 | #define LONG_MAX ((long)(~0UL>>1)) | ||
25 | #define LONG_MIN (-LONG_MAX - 1) | ||
26 | #define ULONG_MAX (~0UL) | ||
27 | |||
28 | #define STACK_MAGIC 0xdeadbeef | ||
29 | |||
30 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) | ||
31 | #define ALIGN(x,a) (((x)+(a)-1)&~((a)-1)) | ||
32 | |||
33 | #define KERN_EMERG "<0>" /* system is unusable */ | ||
34 | #define KERN_ALERT "<1>" /* action must be taken immediately */ | ||
35 | #define KERN_CRIT "<2>" /* critical conditions */ | ||
36 | #define KERN_ERR "<3>" /* error conditions */ | ||
37 | #define KERN_WARNING "<4>" /* warning conditions */ | ||
38 | #define KERN_NOTICE "<5>" /* normal but significant condition */ | ||
39 | #define KERN_INFO "<6>" /* informational */ | ||
40 | #define KERN_DEBUG "<7>" /* debug-level messages */ | ||
41 | |||
42 | extern int console_printk[]; | ||
43 | |||
44 | #define console_loglevel (console_printk[0]) | ||
45 | #define default_message_loglevel (console_printk[1]) | ||
46 | #define minimum_console_loglevel (console_printk[2]) | ||
47 | #define default_console_loglevel (console_printk[3]) | ||
48 | |||
49 | struct completion; | ||
50 | |||
51 | /** | ||
52 | * might_sleep - annotation for functions that can sleep | ||
53 | * | ||
54 | * this macro will print a stack trace if it is executed in an atomic | ||
55 | * context (spinlock, irq-handler, ...). | ||
56 | * | ||
57 | * This is a useful debugging help to be able to catch problems early and not | ||
58 | * be biten later when the calling function happens to sleep when it is not | ||
59 | * supposed to. | ||
60 | */ | ||
61 | #ifdef CONFIG_DEBUG_SPINLOCK_SLEEP | ||
62 | #define might_sleep() __might_sleep(__FILE__, __LINE__) | ||
63 | #define might_sleep_if(cond) do { if (unlikely(cond)) might_sleep(); } while (0) | ||
64 | void __might_sleep(char *file, int line); | ||
65 | #else | ||
66 | #define might_sleep() do {} while(0) | ||
67 | #define might_sleep_if(cond) do {} while (0) | ||
68 | #endif | ||
69 | |||
70 | #define abs(x) ({ \ | ||
71 | int __x = (x); \ | ||
72 | (__x < 0) ? -__x : __x; \ | ||
73 | }) | ||
74 | |||
75 | #define labs(x) ({ \ | ||
76 | long __x = (x); \ | ||
77 | (__x < 0) ? -__x : __x; \ | ||
78 | }) | ||
79 | |||
80 | extern struct notifier_block *panic_notifier_list; | ||
81 | extern long (*panic_blink)(long time); | ||
82 | NORET_TYPE void panic(const char * fmt, ...) | ||
83 | __attribute__ ((NORET_AND format (printf, 1, 2))); | ||
84 | fastcall NORET_TYPE void do_exit(long error_code) | ||
85 | ATTRIB_NORET; | ||
86 | NORET_TYPE void complete_and_exit(struct completion *, long) | ||
87 | ATTRIB_NORET; | ||
88 | extern unsigned long simple_strtoul(const char *,char **,unsigned int); | ||
89 | extern long simple_strtol(const char *,char **,unsigned int); | ||
90 | extern unsigned long long simple_strtoull(const char *,char **,unsigned int); | ||
91 | extern long long simple_strtoll(const char *,char **,unsigned int); | ||
92 | extern int sprintf(char * buf, const char * fmt, ...) | ||
93 | __attribute__ ((format (printf, 2, 3))); | ||
94 | extern int vsprintf(char *buf, const char *, va_list) | ||
95 | __attribute__ ((format (printf, 2, 0))); | ||
96 | extern int snprintf(char * buf, size_t size, const char * fmt, ...) | ||
97 | __attribute__ ((format (printf, 3, 4))); | ||
98 | extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) | ||
99 | __attribute__ ((format (printf, 3, 0))); | ||
100 | extern int scnprintf(char * buf, size_t size, const char * fmt, ...) | ||
101 | __attribute__ ((format (printf, 3, 4))); | ||
102 | extern int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) | ||
103 | __attribute__ ((format (printf, 3, 0))); | ||
104 | |||
105 | extern int sscanf(const char *, const char *, ...) | ||
106 | __attribute__ ((format (scanf, 2, 3))); | ||
107 | extern int vsscanf(const char *, const char *, va_list) | ||
108 | __attribute__ ((format (scanf, 2, 0))); | ||
109 | |||
110 | extern int get_option(char **str, int *pint); | ||
111 | extern char *get_options(const char *str, int nints, int *ints); | ||
112 | extern unsigned long long memparse(char *ptr, char **retptr); | ||
113 | |||
114 | extern int __kernel_text_address(unsigned long addr); | ||
115 | extern int kernel_text_address(unsigned long addr); | ||
116 | extern int session_of_pgrp(int pgrp); | ||
117 | |||
118 | asmlinkage int vprintk(const char *fmt, va_list args) | ||
119 | __attribute__ ((format (printf, 1, 0))); | ||
120 | asmlinkage int printk(const char * fmt, ...) | ||
121 | __attribute__ ((format (printf, 1, 2))); | ||
122 | |||
123 | unsigned long int_sqrt(unsigned long); | ||
124 | |||
125 | static inline int __attribute_pure__ long_log2(unsigned long x) | ||
126 | { | ||
127 | int r = 0; | ||
128 | for (x >>= 1; x > 0; x >>= 1) | ||
129 | r++; | ||
130 | return r; | ||
131 | } | ||
132 | |||
133 | static inline unsigned long __attribute_const__ roundup_pow_of_two(unsigned long x) | ||
134 | { | ||
135 | return (1UL << fls(x - 1)); | ||
136 | } | ||
137 | |||
138 | extern int printk_ratelimit(void); | ||
139 | extern int __printk_ratelimit(int ratelimit_jiffies, int ratelimit_burst); | ||
140 | |||
141 | static inline void console_silent(void) | ||
142 | { | ||
143 | console_loglevel = 0; | ||
144 | } | ||
145 | |||
146 | static inline void console_verbose(void) | ||
147 | { | ||
148 | if (console_loglevel) | ||
149 | console_loglevel = 15; | ||
150 | } | ||
151 | |||
152 | extern void bust_spinlocks(int yes); | ||
153 | extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */ | ||
154 | extern int panic_timeout; | ||
155 | extern int panic_on_oops; | ||
156 | extern int tainted; | ||
157 | extern const char *print_tainted(void); | ||
158 | extern void add_taint(unsigned); | ||
159 | |||
160 | /* Values used for system_state */ | ||
161 | extern enum system_states { | ||
162 | SYSTEM_BOOTING, | ||
163 | SYSTEM_RUNNING, | ||
164 | SYSTEM_HALT, | ||
165 | SYSTEM_POWER_OFF, | ||
166 | SYSTEM_RESTART, | ||
167 | } system_state; | ||
168 | |||
169 | #define TAINT_PROPRIETARY_MODULE (1<<0) | ||
170 | #define TAINT_FORCED_MODULE (1<<1) | ||
171 | #define TAINT_UNSAFE_SMP (1<<2) | ||
172 | #define TAINT_FORCED_RMMOD (1<<3) | ||
173 | #define TAINT_MACHINE_CHECK (1<<4) | ||
174 | #define TAINT_BAD_PAGE (1<<5) | ||
175 | |||
176 | extern void dump_stack(void); | ||
177 | |||
178 | #ifdef DEBUG | ||
179 | #define pr_debug(fmt,arg...) \ | ||
180 | printk(KERN_DEBUG fmt,##arg) | ||
181 | #else | ||
182 | #define pr_debug(fmt,arg...) \ | ||
183 | do { } while (0) | ||
184 | #endif | ||
185 | |||
186 | #define pr_info(fmt,arg...) \ | ||
187 | printk(KERN_INFO fmt,##arg) | ||
188 | |||
189 | /* | ||
190 | * Display an IP address in readable format. | ||
191 | */ | ||
192 | |||
193 | #define NIPQUAD(addr) \ | ||
194 | ((unsigned char *)&addr)[0], \ | ||
195 | ((unsigned char *)&addr)[1], \ | ||
196 | ((unsigned char *)&addr)[2], \ | ||
197 | ((unsigned char *)&addr)[3] | ||
198 | |||
199 | #define NIP6(addr) \ | ||
200 | ntohs((addr).s6_addr16[0]), \ | ||
201 | ntohs((addr).s6_addr16[1]), \ | ||
202 | ntohs((addr).s6_addr16[2]), \ | ||
203 | ntohs((addr).s6_addr16[3]), \ | ||
204 | ntohs((addr).s6_addr16[4]), \ | ||
205 | ntohs((addr).s6_addr16[5]), \ | ||
206 | ntohs((addr).s6_addr16[6]), \ | ||
207 | ntohs((addr).s6_addr16[7]) | ||
208 | |||
209 | #if defined(__LITTLE_ENDIAN) | ||
210 | #define HIPQUAD(addr) \ | ||
211 | ((unsigned char *)&addr)[3], \ | ||
212 | ((unsigned char *)&addr)[2], \ | ||
213 | ((unsigned char *)&addr)[1], \ | ||
214 | ((unsigned char *)&addr)[0] | ||
215 | #elif defined(__BIG_ENDIAN) | ||
216 | #define HIPQUAD NIPQUAD | ||
217 | #else | ||
218 | #error "Please fix asm/byteorder.h" | ||
219 | #endif /* __LITTLE_ENDIAN */ | ||
220 | |||
221 | /* | ||
222 | * min()/max() macros that also do | ||
223 | * strict type-checking.. See the | ||
224 | * "unnecessary" pointer comparison. | ||
225 | */ | ||
226 | #define min(x,y) ({ \ | ||
227 | typeof(x) _x = (x); \ | ||
228 | typeof(y) _y = (y); \ | ||
229 | (void) (&_x == &_y); \ | ||
230 | _x < _y ? _x : _y; }) | ||
231 | |||
232 | #define max(x,y) ({ \ | ||
233 | typeof(x) _x = (x); \ | ||
234 | typeof(y) _y = (y); \ | ||
235 | (void) (&_x == &_y); \ | ||
236 | _x > _y ? _x : _y; }) | ||
237 | |||
238 | /* | ||
239 | * ..and if you can't take the strict | ||
240 | * types, you can specify one yourself. | ||
241 | * | ||
242 | * Or not use min/max at all, of course. | ||
243 | */ | ||
244 | #define min_t(type,x,y) \ | ||
245 | ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; }) | ||
246 | #define max_t(type,x,y) \ | ||
247 | ({ type __x = (x); type __y = (y); __x > __y ? __x: __y; }) | ||
248 | |||
249 | |||
250 | /** | ||
251 | * container_of - cast a member of a structure out to the containing structure | ||
252 | * | ||
253 | * @ptr: the pointer to the member. | ||
254 | * @type: the type of the container struct this is embedded in. | ||
255 | * @member: the name of the member within the struct. | ||
256 | * | ||
257 | */ | ||
258 | #define container_of(ptr, type, member) ({ \ | ||
259 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ | ||
260 | (type *)( (char *)__mptr - offsetof(type,member) );}) | ||
261 | |||
262 | /* | ||
263 | * Check at compile time that something is of a particular type. | ||
264 | * Always evaluates to 1 so you may use it easily in comparisons. | ||
265 | */ | ||
266 | #define typecheck(type,x) \ | ||
267 | ({ type __dummy; \ | ||
268 | typeof(x) __dummy2; \ | ||
269 | (void)(&__dummy == &__dummy2); \ | ||
270 | 1; \ | ||
271 | }) | ||
272 | |||
273 | #endif /* __KERNEL__ */ | ||
274 | |||
275 | #define SI_LOAD_SHIFT 16 | ||
276 | struct sysinfo { | ||
277 | long uptime; /* Seconds since boot */ | ||
278 | unsigned long loads[3]; /* 1, 5, and 15 minute load averages */ | ||
279 | unsigned long totalram; /* Total usable main memory size */ | ||
280 | unsigned long freeram; /* Available memory size */ | ||
281 | unsigned long sharedram; /* Amount of shared memory */ | ||
282 | unsigned long bufferram; /* Memory used by buffers */ | ||
283 | unsigned long totalswap; /* Total swap space size */ | ||
284 | unsigned long freeswap; /* swap space still available */ | ||
285 | unsigned short procs; /* Number of current processes */ | ||
286 | unsigned short pad; /* explicit padding for m68k */ | ||
287 | unsigned long totalhigh; /* Total high memory size */ | ||
288 | unsigned long freehigh; /* Available high memory size */ | ||
289 | unsigned int mem_unit; /* Memory unit size in bytes */ | ||
290 | char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */ | ||
291 | }; | ||
292 | |||
293 | extern void BUILD_BUG(void); | ||
294 | #define BUILD_BUG_ON(condition) do { if (condition) BUILD_BUG(); } while(0) | ||
295 | |||
296 | #ifdef CONFIG_SYSCTL | ||
297 | extern int randomize_va_space; | ||
298 | #else | ||
299 | #define randomize_va_space 1 | ||
300 | #endif | ||
301 | |||
302 | /* Trap pasters of __FUNCTION__ at compile-time */ | ||
303 | #if __GNUC__ > 2 || __GNUC_MINOR__ >= 95 | ||
304 | #define __FUNCTION__ (__func__) | ||
305 | #endif | ||
306 | |||
307 | #endif | ||