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1 | #ifndef _LINUX_KERNEL_H |
1 | #ifndef _LINUX_KERNEL_H |
2 | #define _LINUX_KERNEL_H |
2 | #define _LINUX_KERNEL_H |
Line 3... | Line -... | ||
3 | - | ||
4 | /* |
- | |
5 | * 'kernel.h' contains some often-used function prototypes etc |
- | |
6 | */ |
- | |
7 | - | ||
Line 8... | Line 3... | ||
8 | #ifdef __KERNEL__ |
3 | |
- | 4 | ||
9 | 5 | #include |
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10 | #include |
6 | #include |
11 | #include |
7 | #include |
12 | #include |
8 | #include |
13 | #include |
9 | #include |
14 | #include |
10 | #include |
15 | #include |
- | |
16 | #include |
11 | #include |
- | 12 | #include |
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- | 13 | #include |
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Line 17... | Line 14... | ||
17 | 14 | #include |
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18 | #define __init |
15 | #include |
19 | 16 | ||
20 | #define USHRT_MAX ((u16)(~0U)) |
17 | #define USHRT_MAX ((u16)(~0U)) |
Line 42... | Line 39... | ||
42 | #define S32_MIN ((s32)(-S32_MAX - 1)) |
39 | #define S32_MIN ((s32)(-S32_MAX - 1)) |
43 | #define U64_MAX ((u64)~0ULL) |
40 | #define U64_MAX ((u64)~0ULL) |
44 | #define S64_MAX ((s64)(U64_MAX>>1)) |
41 | #define S64_MAX ((s64)(U64_MAX>>1)) |
45 | #define S64_MIN ((s64)(-S64_MAX - 1)) |
42 | #define S64_MIN ((s64)(-S64_MAX - 1)) |
Line -... | Line 43... | ||
- | 43 | ||
- | 44 | #define STACK_MAGIC 0xdeadbeef |
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- | 45 | ||
- | 46 | #define REPEAT_BYTE(x) ((~0ul / 0xff) * (x)) |
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46 | 47 | ||
47 | #define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1) |
48 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) |
48 | #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) |
49 | #define __ALIGN_MASK(x, mask) __ALIGN_KERNEL_MASK((x), (mask)) |
49 | #define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a))) |
50 | #define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a))) |
Line 50... | Line 51... | ||
50 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) |
51 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) |
Line 112... | Line 113... | ||
112 | typeof(x) rem = (x) % (denom); \ |
113 | typeof(x) rem = (x) % (denom); \ |
113 | (quot * (numer)) + ((rem * (numer)) / (denom)); \ |
114 | (quot * (numer)) + ((rem * (numer)) / (denom)); \ |
114 | } \ |
115 | } \ |
115 | ) |
116 | ) |
Line 116... | Line -... | ||
116 | - | ||
117 | #define clamp_t(type, val, min, max) ({ \ |
- | |
118 | type __val = (val); \ |
- | |
119 | type __min = (min); \ |
- | |
120 | type __max = (max); \ |
- | |
121 | __val = __val < __min ? __min: __val; \ |
- | |
Line -... | Line 117... | ||
- | 117 | ||
- | 118 | ||
Line -... | Line 119... | ||
- | 119 | #define _RET_IP_ (unsigned long)__builtin_return_address(0) |
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- | 120 | #define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; }) |
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- | 121 | ||
- | 122 | #ifdef CONFIG_LBDAF |
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- | 123 | # include |
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- | 124 | # define sector_div(a, b) do_div(a, b) |
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- | 125 | #else |
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- | 126 | # define sector_div(n, b)( \ |
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- | 127 | { \ |
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- | 128 | int _res; \ |
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- | 129 | _res = (n) % (b); \ |
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- | 130 | (n) /= (b); \ |
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- | 131 | _res; \ |
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Line 122... | Line 132... | ||
122 | __val > __max ? __max: __val; }) |
132 | } \ |
123 | 133 | ) |
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124 | 134 | #endif |
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125 | 135 | ||
Line 138... | Line 148... | ||
138 | * @n: the number we're accessing |
148 | * @n: the number we're accessing |
139 | */ |
149 | */ |
140 | #define lower_32_bits(n) ((u32)(n)) |
150 | #define lower_32_bits(n) ((u32)(n)) |
Line -... | Line 151... | ||
- | 151 | ||
- | 152 | ||
- | 153 | /* |
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- | 154 | * abs() handles unsigned and signed longs, ints, shorts and chars. For all |
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- | 155 | * input types abs() returns a signed long. |
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- | 156 | * abs() should not be used for 64-bit types (s64, u64, long long) - use abs64() |
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- | 157 | * for those. |
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- | 158 | */ |
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- | 159 | #define abs(x) ({ \ |
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- | 160 | long ret; \ |
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- | 161 | if (sizeof(x) == sizeof(long)) { \ |
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- | 162 | long __x = (x); \ |
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- | 163 | ret = (__x < 0) ? -__x : __x; \ |
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- | 164 | } else { \ |
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- | 165 | int __x = (x); \ |
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- | 166 | ret = (__x < 0) ? -__x : __x; \ |
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- | 167 | } \ |
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Line 141... | Line 168... | ||
141 | 168 | ret; \ |
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142 | 169 | }) |
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143 | 170 | ||
144 | #define abs64(x) ({ \ |
171 | #define abs64(x) ({ \ |
Line 152... | Line 179... | ||
152 | #define KERN_ERR "<3>" /* error conditions */ |
179 | #define KERN_ERR "<3>" /* error conditions */ |
153 | #define KERN_WARNING "<4>" /* warning conditions */ |
180 | #define KERN_WARNING "<4>" /* warning conditions */ |
154 | #define KERN_NOTICE "<5>" /* normal but significant condition */ |
181 | #define KERN_NOTICE "<5>" /* normal but significant condition */ |
155 | #define KERN_INFO "<6>" /* informational */ |
182 | #define KERN_INFO "<6>" /* informational */ |
156 | #define KERN_DEBUG "<7>" /* debug-level messages */ |
183 | #define KERN_DEBUG "<7>" /* debug-level messages */ |
- | 184 | extern __printf(2, 3) int sprintf(char *buf, const char * fmt, ...); |
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- | 185 | extern __printf(2, 0) int vsprintf(char *buf, const char *, va_list); |
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- | 186 | extern __printf(3, 4) |
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- | 187 | int snprintf(char *buf, size_t size, const char *fmt, ...); |
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- | 188 | extern __printf(3, 0) |
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- | 189 | int vsnprintf(char *buf, size_t size, const char *fmt, va_list args); |
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- | 190 | extern __printf(3, 4) |
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- | 191 | int scnprintf(char *buf, size_t size, const char *fmt, ...); |
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- | 192 | extern __printf(3, 0) |
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- | 193 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args); |
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- | 194 | extern __printf(2, 3) |
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- | 195 | char *kasprintf(gfp_t gfp, const char *fmt, ...); |
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- | 196 | extern char *kvasprintf(gfp_t gfp, const char *fmt, va_list args); |
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- | 197 | enum lockdep_ok { |
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- | 198 | LOCKDEP_STILL_OK, |
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- | 199 | LOCKDEP_NOW_UNRELIABLE |
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- | 200 | }; |
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- | 201 | extern void add_taint(unsigned flag, enum lockdep_ok); |
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- | 202 | extern int test_taint(unsigned flag); |
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- | 203 | extern unsigned long get_taint(void); |
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- | 204 | extern int root_mountflags; |
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- | 205 | ||
- | 206 | extern bool early_boot_irqs_disabled; |
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- | 207 | ||
- | 208 | /* Values used for system_state */ |
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- | 209 | extern enum system_states { |
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- | 210 | SYSTEM_BOOTING, |
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- | 211 | SYSTEM_RUNNING, |
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- | 212 | SYSTEM_HALT, |
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- | 213 | SYSTEM_POWER_OFF, |
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- | 214 | SYSTEM_RESTART, |
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- | 215 | } system_state; |
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- | 216 | ||
- | 217 | #define TAINT_PROPRIETARY_MODULE 0 |
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- | 218 | #define TAINT_FORCED_MODULE 1 |
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- | 219 | #define TAINT_CPU_OUT_OF_SPEC 2 |
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- | 220 | #define TAINT_FORCED_RMMOD 3 |
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- | 221 | #define TAINT_MACHINE_CHECK 4 |
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- | 222 | #define TAINT_BAD_PAGE 5 |
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- | 223 | #define TAINT_USER 6 |
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- | 224 | #define TAINT_DIE 7 |
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- | 225 | #define TAINT_OVERRIDDEN_ACPI_TABLE 8 |
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- | 226 | #define TAINT_WARN 9 |
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- | 227 | #define TAINT_CRAP 10 |
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- | 228 | #define TAINT_FIRMWARE_WORKAROUND 11 |
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- | 229 | #define TAINT_OOT_MODULE 12 |
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- | 230 | #define TAINT_UNSIGNED_MODULE 13 |
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- | 231 | #define TAINT_SOFTLOCKUP 14 |
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- | 232 | ||
157 | extern const char hex_asc[]; |
233 | extern const char hex_asc[]; |
158 | #define hex_asc_lo(x) hex_asc[((x) & 0x0f)] |
234 | #define hex_asc_lo(x) hex_asc[((x) & 0x0f)] |
159 | #define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] |
235 | #define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] |
Line 160... | Line 236... | ||
160 | 236 | ||
161 | static inline char *pack_hex_byte(char *buf, u8 byte) |
237 | static inline char *hex_byte_pack(char *buf, u8 byte) |
162 | { |
238 | { |
163 | *buf++ = hex_asc_hi(byte); |
239 | *buf++ = hex_asc_hi(byte); |
164 | *buf++ = hex_asc_lo(byte); |
240 | *buf++ = hex_asc_lo(byte); |
165 | return buf; |
241 | return buf; |
Line -... | Line 242... | ||
- | 242 | } |
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- | 243 | ||
- | 244 | extern const char hex_asc_upper[]; |
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- | 245 | #define hex_asc_upper_lo(x) hex_asc_upper[((x) & 0x0f)] |
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- | 246 | #define hex_asc_upper_hi(x) hex_asc_upper[((x) & 0xf0) >> 4] |
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- | 247 | ||
- | 248 | static inline char *hex_byte_pack_upper(char *buf, u8 byte) |
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- | 249 | { |
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- | 250 | *buf++ = hex_asc_upper_hi(byte); |
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- | 251 | *buf++ = hex_asc_upper_lo(byte); |
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- | 252 | return buf; |
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- | 253 | } |
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- | 254 | ||
- | 255 | extern int hex_to_bin(char ch); |
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- | 256 | extern int __must_check hex2bin(u8 *dst, const char *src, size_t count); |
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- | 257 | extern char *bin2hex(char *dst, const void *src, size_t count); |
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- | 258 | ||
- | 259 | bool mac_pton(const char *s, u8 *mac); |
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- | 260 | ||
- | 261 | /* |
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- | 262 | * General tracing related utility functions - trace_printk(), |
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- | 263 | * tracing_on/tracing_off and tracing_start()/tracing_stop |
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- | 264 | * |
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- | 265 | * Use tracing_on/tracing_off when you want to quickly turn on or off |
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- | 266 | * tracing. It simply enables or disables the recording of the trace events. |
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- | 267 | * This also corresponds to the user space /sys/kernel/debug/tracing/tracing_on |
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- | 268 | * file, which gives a means for the kernel and userspace to interact. |
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- | 269 | * Place a tracing_off() in the kernel where you want tracing to end. |
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- | 270 | * From user space, examine the trace, and then echo 1 > tracing_on |
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- | 271 | * to continue tracing. |
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- | 272 | * |
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- | 273 | * tracing_stop/tracing_start has slightly more overhead. It is used |
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- | 274 | * by things like suspend to ram where disabling the recording of the |
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- | 275 | * trace is not enough, but tracing must actually stop because things |
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- | 276 | * like calling smp_processor_id() may crash the system. |
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- | 277 | * |
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- | 278 | * Most likely, you want to use tracing_on/tracing_off. |
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- | 279 | */ |
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- | 280 | #ifdef CONFIG_RING_BUFFER |
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- | 281 | /* trace_off_permanent stops recording with no way to bring it back */ |
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- | 282 | void tracing_off_permanent(void); |
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166 | } |
283 | #else |
- | 284 | static inline void tracing_off_permanent(void) { } |
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- | 285 | #endif |
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167 | 286 | ||
168 | enum { |
287 | enum ftrace_dump_mode { |
169 | DUMP_PREFIX_NONE, |
288 | DUMP_NONE, |
170 | DUMP_PREFIX_ADDRESS, |
289 | DUMP_ALL, |
Line -... | Line 290... | ||
- | 290 | DUMP_ORIG, |
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- | 291 | }; |
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- | 292 | ||
171 | DUMP_PREFIX_OFFSET |
293 | #ifdef CONFIG_TRACING |
- | 294 | void tracing_on(void); |
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172 | }; |
295 | void tracing_off(void); |
Line -... | Line 296... | ||
- | 296 | int tracing_is_on(void); |
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- | 297 | void tracing_snapshot(void); |
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Line -... | Line 298... | ||
- | 298 | void tracing_snapshot_alloc(void); |
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173 | 299 | ||
- | 300 | extern void tracing_start(void); |
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- | 301 | extern void tracing_stop(void); |
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- | 302 | ||
- | 303 | static inline __printf(1, 2) |
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- | 304 | void ____trace_printk_check_format(const char *fmt, ...) |
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- | 305 | { |
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- | 306 | } |
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Line -... | Line 307... | ||
- | 307 | #define __trace_printk_check_format(fmt, args...) \ |
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- | 308 | do { \ |
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- | 309 | if (0) \ |
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- | 310 | ____trace_printk_check_format(fmt, ##args); \ |
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- | 311 | } while (0) |
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- | 312 | ||
- | 313 | /** |
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- | 314 | * trace_printk - printf formatting in the ftrace buffer |
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- | 315 | * @fmt: the printf format for printing |
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- | 316 | * |
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- | 317 | * Note: __trace_printk is an internal function for trace_printk and |
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- | 318 | * the @ip is passed in via the trace_printk macro. |
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- | 319 | * |
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- | 320 | * This function allows a kernel developer to debug fast path sections |
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- | 321 | * that printk is not appropriate for. By scattering in various |
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- | 322 | * printk like tracing in the code, a developer can quickly see |
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- | 323 | * where problems are occurring. |
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- | 324 | * |
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- | 325 | * This is intended as a debugging tool for the developer only. |
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- | 326 | * Please refrain from leaving trace_printks scattered around in |
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- | 327 | * your code. (Extra memory is used for special buffers that are |
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- | 328 | * allocated when trace_printk() is used) |
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- | 329 | * |
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- | 330 | * A little optization trick is done here. If there's only one |
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- | 331 | * argument, there's no need to scan the string for printf formats. |
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- | 332 | * The trace_puts() will suffice. But how can we take advantage of |
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- | 333 | * using trace_puts() when trace_printk() has only one argument? |
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- | 334 | * By stringifying the args and checking the size we can tell |
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- | 335 | * whether or not there are args. __stringify((__VA_ARGS__)) will |
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- | 336 | * turn into "()\0" with a size of 3 when there are no args, anything |
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- | 337 | * else will be bigger. All we need to do is define a string to this, |
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- | 338 | * and then take its size and compare to 3. If it's bigger, use |
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- | 339 | * do_trace_printk() otherwise, optimize it to trace_puts(). Then just |
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- | 340 | * let gcc optimize the rest. |
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- | 341 | */ |
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- | 342 | ||
- | 343 | #define trace_printk(fmt, ...) \ |
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- | 344 | do { \ |
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- | 345 | char _______STR[] = __stringify((__VA_ARGS__)); \ |
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- | 346 | if (sizeof(_______STR) > 3) \ |
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- | 347 | do_trace_printk(fmt, ##__VA_ARGS__); \ |
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- | 348 | else \ |
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- | 349 | trace_puts(fmt); \ |
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- | 350 | } while (0) |
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- | 351 | ||
- | 352 | #define do_trace_printk(fmt, args...) \ |
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- | 353 | do { \ |
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- | 354 | static const char *trace_printk_fmt \ |
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174 | int hex_to_bin(char ch); |
355 | __attribute__((section("__trace_printk_fmt"))) = \ |
- | 356 | __builtin_constant_p(fmt) ? fmt : NULL; \ |
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- | 357 | \ |
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- | 358 | __trace_printk_check_format(fmt, ##args); \ |
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Line 175... | Line -... | ||
175 | int hex2bin(u8 *dst, const char *src, size_t count); |
- | |
176 | 359 | \ |
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- | 360 | if (__builtin_constant_p(fmt)) \ |
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- | 361 | __trace_bprintk(_THIS_IP_, trace_printk_fmt, ##args); \ |
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- | 362 | else \ |
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177 | 363 | __trace_printk(_THIS_IP_, fmt, ##args); \ |
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- | 364 | } while (0) |
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- | 365 | ||
- | 366 | extern __printf(2, 3) |
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- | 367 | int __trace_bprintk(unsigned long ip, const char *fmt, ...); |
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- | 368 | ||
- | 369 | extern __printf(2, 3) |
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- | 370 | int __trace_printk(unsigned long ip, const char *fmt, ...); |
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- | 371 | ||
- | 372 | /** |
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- | 373 | * trace_puts - write a string into the ftrace buffer |
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- | 374 | * @str: the string to record |
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- | 375 | * |
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- | 376 | * Note: __trace_bputs is an internal function for trace_puts and |
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- | 377 | * the @ip is passed in via the trace_puts macro. |
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- | 378 | * |
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- | 379 | * This is similar to trace_printk() but is made for those really fast |
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- | 380 | * paths that a developer wants the least amount of "Heisenbug" affects, |
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- | 381 | * where the processing of the print format is still too much. |
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- | 382 | * |
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- | 383 | * This function allows a kernel developer to debug fast path sections |
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- | 384 | * that printk is not appropriate for. By scattering in various |
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- | 385 | * printk like tracing in the code, a developer can quickly see |
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- | 386 | * where problems are occurring. |
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- | 387 | * |
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- | 388 | * This is intended as a debugging tool for the developer only. |
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- | 389 | * Please refrain from leaving trace_puts scattered around in |
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- | 390 | * your code. (Extra memory is used for special buffers that are |
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- | 391 | * allocated when trace_puts() is used) |
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- | 392 | * |
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- | 393 | * Returns: 0 if nothing was written, positive # if string was. |
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- | 394 | * (1 when __trace_bputs is used, strlen(str) when __trace_puts is used) |
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- | 395 | */ |
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- | 396 | ||
- | 397 | #define trace_puts(str) ({ \ |
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- | 398 | static const char *trace_printk_fmt \ |
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- | 399 | __attribute__((section("__trace_printk_fmt"))) = \ |
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- | 400 | __builtin_constant_p(str) ? str : NULL; \ |
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- | 401 | \ |
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- | 402 | if (__builtin_constant_p(str)) \ |
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- | 403 | __trace_bputs(_THIS_IP_, trace_printk_fmt); \ |
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- | 404 | else \ |
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- | 405 | __trace_puts(_THIS_IP_, str, strlen(str)); \ |
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- | 406 | }) |
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- | 407 | extern int __trace_bputs(unsigned long ip, const char *str); |
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- | 408 | extern int __trace_puts(unsigned long ip, const char *str, int size); |
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- | 409 | ||
- | 410 | extern void trace_dump_stack(int skip); |
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- | 411 | ||
- | 412 | /* |
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- | 413 | * The double __builtin_constant_p is because gcc will give us an error |
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- | 414 | * if we try to allocate the static variable to fmt if it is not a |
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- | 415 | * constant. Even with the outer if statement. |
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- | 416 | */ |
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- | 417 | #define ftrace_vprintk(fmt, vargs) \ |
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- | 418 | do { \ |
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- | 419 | if (__builtin_constant_p(fmt)) { \ |
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- | 420 | static const char *trace_printk_fmt \ |
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- | 421 | __attribute__((section("__trace_printk_fmt"))) = \ |
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- | 422 | __builtin_constant_p(fmt) ? fmt : NULL; \ |
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- | 423 | \ |
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- | 424 | __ftrace_vbprintk(_THIS_IP_, trace_printk_fmt, vargs); \ |
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- | 425 | } else \ |
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- | 426 | __ftrace_vprintk(_THIS_IP_, fmt, vargs); \ |
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- | 427 | } while (0) |
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- | 428 | ||
- | 429 | extern int |
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- | 430 | __ftrace_vbprintk(unsigned long ip, const char *fmt, va_list ap); |
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- | 431 | ||
- | 432 | extern int |
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- | 433 | __ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap); |
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- | 434 | ||
- | 435 | extern void ftrace_dump(enum ftrace_dump_mode oops_dump_mode); |
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- | 436 | #else |
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- | 437 | static inline void tracing_start(void) { } |
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- | 438 | static inline void tracing_stop(void) { } |
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- | 439 | static inline void trace_dump_stack(int skip) { } |
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- | 440 | ||
- | 441 | static inline void tracing_on(void) { } |
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- | 442 | static inline void tracing_off(void) { } |
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- | 443 | static inline int tracing_is_on(void) { return 0; } |
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- | 444 | static inline void tracing_snapshot(void) { } |
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- | 445 | static inline void tracing_snapshot_alloc(void) { } |
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- | 446 | ||
- | 447 | static inline __printf(1, 2) |
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- | 448 | int trace_printk(const char *fmt, ...) |
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- | 449 | { |
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- | 450 | return 0; |
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- | 451 | } |
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Line 178... | Line 452... | ||
178 | //int printk(const char *fmt, ...); |
452 | static inline int |
179 | 453 | ftrace_vprintk(const char *fmt, va_list ap) |
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180 | #define printk(fmt, arg...) dbgprintf(fmt , ##arg) |
454 | { |
181 | 455 | return 0; |
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Line 198... | Line 472... | ||
198 | typeof(x) _max1 = (x); \ |
472 | typeof(x) _max1 = (x); \ |
199 | typeof(y) _max2 = (y); \ |
473 | typeof(y) _max2 = (y); \ |
200 | (void) (&_max1 == &_max2); \ |
474 | (void) (&_max1 == &_max2); \ |
201 | _max1 > _max2 ? _max1 : _max2; }) |
475 | _max1 > _max2 ? _max1 : _max2; }) |
Line 202... | Line 476... | ||
202 | 476 | ||
203 | #define min3(x, y, z) ({ \ |
- | |
204 | typeof(x) _min1 = (x); \ |
- | |
205 | typeof(y) _min2 = (y); \ |
- | |
206 | typeof(z) _min3 = (z); \ |
- | |
207 | (void) (&_min1 == &_min2); \ |
- | |
208 | (void) (&_min1 == &_min3); \ |
- | |
209 | _min1 < _min2 ? (_min1 < _min3 ? _min1 : _min3) : \ |
- | |
210 | (_min2 < _min3 ? _min2 : _min3); }) |
- | |
211 | 477 | #define min3(x, y, z) min((typeof(x))min(x, y), z) |
|
212 | #define max3(x, y, z) ({ \ |
- | |
213 | typeof(x) _max1 = (x); \ |
- | |
214 | typeof(y) _max2 = (y); \ |
- | |
215 | typeof(z) _max3 = (z); \ |
- | |
216 | (void) (&_max1 == &_max2); \ |
- | |
217 | (void) (&_max1 == &_max3); \ |
- | |
218 | _max1 > _max2 ? (_max1 > _max3 ? _max1 : _max3) : \ |
- | |
Line 219... | Line 478... | ||
219 | (_max2 > _max3 ? _max2 : _max3); }) |
478 | #define max3(x, y, z) max((typeof(x))max(x, y), z) |
220 | 479 | ||
221 | /** |
480 | /** |
222 | * min_not_zero - return the minimum that is _not_ zero, unless both are zero |
481 | * min_not_zero - return the minimum that is _not_ zero, unless both are zero |
Line 229... | Line 488... | ||
229 | __x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); }) |
488 | __x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); }) |
Line 230... | Line 489... | ||
230 | 489 | ||
231 | /** |
490 | /** |
232 | * clamp - return a value clamped to a given range with strict typechecking |
491 | * clamp - return a value clamped to a given range with strict typechecking |
233 | * @val: current value |
492 | * @val: current value |
234 | * @min: minimum allowable value |
493 | * @lo: lowest allowable value |
235 | * @max: maximum allowable value |
494 | * @hi: highest allowable value |
236 | * |
495 | * |
237 | * This macro does strict typechecking of min/max to make sure they are of the |
496 | * This macro does strict typechecking of lo/hi to make sure they are of the |
238 | * same type as val. See the unnecessary pointer comparisons. |
497 | * same type as val. See the unnecessary pointer comparisons. |
239 | */ |
498 | */ |
240 | #define clamp(val, min, max) ({ \ |
- | |
241 | typeof(val) __val = (val); \ |
- | |
242 | typeof(min) __min = (min); \ |
- | |
243 | typeof(max) __max = (max); \ |
- | |
244 | (void) (&__val == &__min); \ |
- | |
245 | (void) (&__val == &__max); \ |
- | |
246 | __val = __val < __min ? __min: __val; \ |
- | |
Line 247... | Line 499... | ||
247 | __val > __max ? __max: __val; }) |
499 | #define clamp(val, lo, hi) min((typeof(val))max(val, lo), hi) |
248 | 500 | ||
249 | /* |
501 | /* |
250 | * ..and if you can't take the strict |
502 | * ..and if you can't take the strict |
Line 261... | Line 513... | ||
261 | type __max1 = (x); \ |
513 | type __max1 = (x); \ |
262 | type __max2 = (y); \ |
514 | type __max2 = (y); \ |
263 | __max1 > __max2 ? __max1: __max2; }) |
515 | __max1 > __max2 ? __max1: __max2; }) |
Line 264... | Line 516... | ||
264 | 516 | ||
- | 517 | /** |
|
- | 518 | * clamp_t - return a value clamped to a given range using a given type |
|
- | 519 | * @type: the type of variable to use |
|
- | 520 | * @val: current value |
|
- | 521 | * @lo: minimum allowable value |
|
- | 522 | * @hi: maximum allowable value |
|
- | 523 | * |
|
- | 524 | * This macro does no typechecking and uses temporary variables of type |
|
- | 525 | * 'type' to make all the comparisons. |
|
- | 526 | */ |
|
- | 527 | #define clamp_t(type, val, lo, hi) min_t(type, max_t(type, val, lo), hi) |
|
- | 528 | ||
- | 529 | /** |
|
- | 530 | * clamp_val - return a value clamped to a given range using val's type |
|
- | 531 | * @val: current value |
|
- | 532 | * @lo: minimum allowable value |
|
- | 533 | * @hi: maximum allowable value |
|
- | 534 | * |
|
- | 535 | * This macro does no typechecking and uses temporary variables of whatever |
|
- | 536 | * type the input argument 'val' is. This is useful when val is an unsigned |
|
- | 537 | * type and min and max are literals that will otherwise be assigned a signed |
|
- | 538 | * integer type. |
|
- | 539 | */ |
|
- | 540 | #define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi) |
|
- | 541 | ||
- | 542 | ||
- | 543 | /* |
|
- | 544 | * swap - swap value of @a and @b |
|
- | 545 | */ |
|
- | 546 | #define swap(a, b) \ |
|
- | 547 | do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0) |
|
- | 548 | ||
265 | /** |
549 | /** |
266 | * container_of - cast a member of a structure out to the containing structure |
550 | * container_of - cast a member of a structure out to the containing structure |
267 | * @ptr: the pointer to the member. |
551 | * @ptr: the pointer to the member. |
268 | * @type: the type of the container struct this is embedded in. |
552 | * @type: the type of the container struct this is embedded in. |
269 | * @member: the name of the member within the struct. |
553 | * @member: the name of the member within the struct. |
270 | * |
554 | * |
271 | */ |
555 | */ |
272 | #define container_of(ptr, type, member) ({ \ |
556 | #define container_of(ptr, type, member) ({ \ |
273 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
557 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
Line -... | Line 558... | ||
- | 558 | (type *)( (char *)__mptr - offsetof(type,member) );}) |
|
- | 559 | ||
- | 560 | /* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */ |
|
- | 561 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
|
Line 274... | Line 562... | ||
274 | (type *)( (char *)__mptr - offsetof(type,member) );}) |
562 | # define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD |
275 | - | ||
- | 563 | #endif |
|
- | 564 | ||
276 | 565 | /* Permissions on a sysfs file: you didn't miss the 0 prefix did you? */ |
|
277 | static inline void *kcalloc(size_t n, size_t size, uint32_t flags) |
566 | #define VERIFY_OCTAL_PERMISSIONS(perms) \ |
- | 567 | (BUILD_BUG_ON_ZERO((perms) < 0) + \ |
|
- | 568 | BUILD_BUG_ON_ZERO((perms) > 0777) + \ |
|
278 | { |
569 | /* User perms >= group perms >= other perms */ \ |
- | 570 | BUILD_BUG_ON_ZERO(((perms) >> 6) < (((perms) >> 3) & 7)) + \ |
|
279 | if (n != 0 && size > ULONG_MAX / n) |
571 | BUILD_BUG_ON_ZERO((((perms) >> 3) & 7) < ((perms) & 7)) + \ |
Line 280... | Line 572... | ||
280 | return NULL; |
572 | /* Other writable? Generally considered a bad idea. */ \ |
Line 281... | Line -... | ||
281 | return kzalloc(n * size, 0); |
- | |
Line 282... | Line 573... | ||
282 | } |
573 | BUILD_BUG_ON_ZERO((perms) & 2) + \ |
Line 283... | Line -... | ||
283 | - | ||
Line 284... | Line 574... | ||
284 | 574 | (perms)) |
|
285 | void free (void *ptr); |
575 | |
286 | 576 | ||
287 | #endif /* __KERNEL__ */ |
577 | void free (void *ptr); |
Line 350... | Line 640... | ||
350 | 640 | ||
Line 351... | Line 641... | ||
351 | int del_timer(struct timer_list *timer); |
641 | int del_timer(struct timer_list *timer); |
Line 352... | Line -... | ||
352 | - | ||
353 | # define del_timer_sync(t) del_timer(t) |
- | |
354 | - | ||
355 | struct timespec { |
- | |
356 | long tv_sec; /* seconds */ |
- | |
357 | long tv_nsec; /* nanoseconds */ |
- | |
358 | }; |
- | |
359 | - | ||
360 | - | ||
361 | #define mb() asm volatile("mfence" : : : "memory") |
- | |
Line 362... | Line 642... | ||
362 | #define rmb() asm volatile("lfence" : : : "memory") |
642 | |
363 | #define wmb() asm volatile("sfence" : : : "memory") |
643 | # define del_timer_sync(t) del_timer(t) |
364 | 644 | ||
365 | 645 | ||
Line 398... | Line 678... | ||
398 | 678 | ||
399 | #define __raw_writeb __writeb |
679 | #define __raw_writeb __writeb |
400 | #define __raw_writew __writew |
680 | #define __raw_writew __writew |
Line 401... | Line -... | ||
401 | #define __raw_writel __writel |
- | |
402 | - | ||
403 | static inline __u64 readq(const volatile void __iomem *addr) |
- | |
404 | { |
- | |
405 | const volatile u32 __iomem *p = addr; |
- | |
406 | u32 low, high; |
- | |
407 | - | ||
408 | low = readl(p); |
- | |
409 | high = readl(p + 1); |
- | |
410 | - | ||
411 | return low + ((u64)high << 32); |
- | |
412 | } |
- | |
413 | - | ||
414 | static inline void writeq(__u64 val, volatile void __iomem *addr) |
- | |
415 | { |
- | |
416 | writel(val, addr); |
- | |
417 | writel(val >> 32, addr+4); |
- | |
418 | } |
681 | #define __raw_writel __writel |
419 | 682 | ||
Line 420... | Line 683... | ||
420 | #define swap(a, b) \ |
683 | #define swap(a, b) \ |
Line 430... | Line 693... | ||
430 | printk("Warning %s " format, __func__ , ## arg) |
693 | printk("Warning %s " format, __func__ , ## arg) |
Line 431... | Line 694... | ||
431 | 694 | ||
432 | #define dev_info(dev, format, arg...) \ |
695 | #define dev_info(dev, format, arg...) \ |
Line 433... | Line -... | ||
433 | printk("Info %s " format , __func__, ## arg) |
- | |
434 | - | ||
435 | //#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) |
- | |
436 | #define BUILD_BUG_ON(condition) |
696 | printk("Info %s " format , __func__, ## arg) |
437 | 697 | ||
438 | struct page |
698 | struct page |
439 | { |
699 | { |
Line 465... | Line 725... | ||
465 | 725 | ||
Line 466... | Line 726... | ||
466 | #define __free_page(page) FreePage(page_to_phys(page)) |
726 | #define __free_page(page) FreePage(page_to_phys(page)) |
467 | 727 | ||
468 | #define get_page(a) |
- | |
469 | #define put_page(a) |
- | |
Line 470... | Line 728... | ||
470 | #define set_pages_uc(a,b) |
728 | #define get_page(a) |
471 | #define set_pages_wb(a,b) |
729 | #define put_page(a) |
Line 472... | Line 730... | ||
472 | 730 | ||
Line 473... | Line -... | ||
473 | #define pci_map_page(dev, page, offset, size, direction) \ |
- | |
474 | (dma_addr_t)( (offset)+page_to_phys(page)) |
- | |
475 | - | ||
476 | #define pci_unmap_page(dev, dma_address, size, direction) |
- | |
477 | - | ||
478 | #define GFP_TEMPORARY 0 |
731 | #define pci_map_page(dev, page, offset, size, direction) \ |
Line 479... | Line 732... | ||
479 | #define __GFP_NOWARN 0 |
732 | (dma_addr_t)( (offset)+page_to_phys(page)) |
Line 480... | Line 733... | ||
480 | #define __GFP_NORETRY 0 |
733 | |
481 | #define GFP_NOWAIT 0 |
734 | #define pci_unmap_page(dev, dma_address, size, direction) |
482 | 735 | ||
483 | #define IS_ENABLED(a) 0 |
736 | #define IS_ENABLED(a) 0 |
- | 737 | ||
- | 738 | ||
- | 739 | #define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x)) |
|
- | 740 | ||
- | 741 | //#define RCU_INIT_POINTER(p, v) \ |
|
- | 742 | // do { \ |
|
- | 743 | // p = (typeof(*v) __force __rcu *)(v); \ |
|
- | 744 | // } while (0) |
|
- | 745 | ||
- | 746 | ||
- | 747 | //#define rcu_dereference_raw(p) ({ \ |
|
- | 748 | // typeof(p) _________p1 = ACCESS_ONCE(p); \ |
|
- | 749 | // (_________p1); \ |
|
Line 484... | Line -... | ||
484 | - | ||
485 | - | ||
486 | #define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x)) |
- | |
487 | - | ||
488 | #define RCU_INIT_POINTER(p, v) \ |
- | |
489 | do { \ |
- | |
490 | p = (typeof(*v) __force __rcu *)(v); \ |
- | |
491 | } while (0) |
- | |
492 | - | ||
493 | - | ||
494 | #define rcu_dereference_raw(p) ({ \ |
- | |
495 | typeof(p) _________p1 = ACCESS_ONCE(p); \ |
- | |
496 | (_________p1); \ |
- | |
Line 497... | Line 750... | ||
497 | }) |
750 | // }) |
Line 498... | Line 751... | ||
498 | #define rcu_assign_pointer(p, v) \ |
751 | |
Line 538... | Line 791... | ||
538 | default: |
791 | default: |
539 | break; |
792 | break; |
540 | } |
793 | } |
541 | } |
794 | } |
Line 542... | Line 795... | ||
542 | 795 | ||
543 | memcpy((void __force *)to, from, n); |
796 | __builtin_memcpy((void __force *)to, from, n); |
544 | return 0; |
797 | return 0; |
Line 545... | Line 798... | ||
545 | } |
798 | } |
Line 546... | Line 799... | ||
546 | 799 | ||
547 | struct seq_file; |
800 | struct seq_file; |
548 | 801 | ||
549 | void *kmap(struct page *page); |
802 | void *kmap(struct page *page); |
Line -... | Line 803... | ||
- | 803 | void *kmap_atomic(struct page *page); |
|
Line -... | Line 804... | ||
- | 804 | void kunmap(struct page *page); |
|
- | 805 | void kunmap_atomic(void *vaddr); |
|
- | 806 | ||
550 | void *kmap_atomic(struct page *page); |
807 | typedef u64 async_cookie_t; |
- | 808 | ||
- | 809 | #define iowrite32(v, addr) writel((v), (addr)) |
|
Line -... | Line 810... | ||
- | 810 | ||
- | 811 |