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authorPaul Mundt <lethal@linux-sh.org>2011-01-13 01:06:28 -0500
committerPaul Mundt <lethal@linux-sh.org>2011-01-13 01:06:28 -0500
commitf43dc23d5ea91fca257be02138a255f02d98e806 (patch)
treeb29722f6e965316e90ac97abf79923ced250dc21 /kernel/spinlock.c
parentf8e53553f452dcbf67cb89c8cba63a1cd6eb4cc0 (diff)
parent4162cf64973df51fc885825bc9ca4d055891c49f (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into common/serial-rework
Conflicts: arch/sh/kernel/cpu/sh2/setup-sh7619.c arch/sh/kernel/cpu/sh2a/setup-mxg.c arch/sh/kernel/cpu/sh2a/setup-sh7201.c arch/sh/kernel/cpu/sh2a/setup-sh7203.c arch/sh/kernel/cpu/sh2a/setup-sh7206.c arch/sh/kernel/cpu/sh3/setup-sh7705.c arch/sh/kernel/cpu/sh3/setup-sh770x.c arch/sh/kernel/cpu/sh3/setup-sh7710.c arch/sh/kernel/cpu/sh3/setup-sh7720.c arch/sh/kernel/cpu/sh4/setup-sh4-202.c arch/sh/kernel/cpu/sh4/setup-sh7750.c arch/sh/kernel/cpu/sh4/setup-sh7760.c arch/sh/kernel/cpu/sh4a/setup-sh7343.c arch/sh/kernel/cpu/sh4a/setup-sh7366.c arch/sh/kernel/cpu/sh4a/setup-sh7722.c arch/sh/kernel/cpu/sh4a/setup-sh7723.c arch/sh/kernel/cpu/sh4a/setup-sh7724.c arch/sh/kernel/cpu/sh4a/setup-sh7763.c arch/sh/kernel/cpu/sh4a/setup-sh7770.c arch/sh/kernel/cpu/sh4a/setup-sh7780.c arch/sh/kernel/cpu/sh4a/setup-sh7785.c arch/sh/kernel/cpu/sh4a/setup-sh7786.c arch/sh/kernel/cpu/sh4a/setup-shx3.c arch/sh/kernel/cpu/sh5/setup-sh5.c drivers/serial/sh-sci.c drivers/serial/sh-sci.h include/linux/serial_sci.h
Diffstat (limited to 'kernel/spinlock.c')
-rw-r--r--kernel/spinlock.c530
1 files changed, 233 insertions, 297 deletions
diff --git a/kernel/spinlock.c b/kernel/spinlock.c
index 7932653c4ebd..be6517fb9c14 100644
--- a/kernel/spinlock.c
+++ b/kernel/spinlock.c
@@ -21,239 +21,72 @@
21#include <linux/debug_locks.h> 21#include <linux/debug_locks.h>
22#include <linux/module.h> 22#include <linux/module.h>
23 23
24int __lockfunc _spin_trylock(spinlock_t *lock)
25{
26 preempt_disable();
27 if (_raw_spin_trylock(lock)) {
28 spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
29 return 1;
30 }
31
32 preempt_enable();
33 return 0;
34}
35EXPORT_SYMBOL(_spin_trylock);
36
37int __lockfunc _read_trylock(rwlock_t *lock)
38{
39 preempt_disable();
40 if (_raw_read_trylock(lock)) {
41 rwlock_acquire_read(&lock->dep_map, 0, 1, _RET_IP_);
42 return 1;
43 }
44
45 preempt_enable();
46 return 0;
47}
48EXPORT_SYMBOL(_read_trylock);
49
50int __lockfunc _write_trylock(rwlock_t *lock)
51{
52 preempt_disable();
53 if (_raw_write_trylock(lock)) {
54 rwlock_acquire(&lock->dep_map, 0, 1, _RET_IP_);
55 return 1;
56 }
57
58 preempt_enable();
59 return 0;
60}
61EXPORT_SYMBOL(_write_trylock);
62
63/* 24/*
64 * If lockdep is enabled then we use the non-preemption spin-ops 25 * If lockdep is enabled then we use the non-preemption spin-ops
65 * even on CONFIG_PREEMPT, because lockdep assumes that interrupts are 26 * even on CONFIG_PREEMPT, because lockdep assumes that interrupts are
66 * not re-enabled during lock-acquire (which the preempt-spin-ops do): 27 * not re-enabled during lock-acquire (which the preempt-spin-ops do):
67 */ 28 */
68#if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC) 29#if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC)
69 30/*
70void __lockfunc _read_lock(rwlock_t *lock) 31 * The __lock_function inlines are taken from
71{ 32 * include/linux/spinlock_api_smp.h
72 preempt_disable(); 33 */
73 rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
74 LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
75}
76EXPORT_SYMBOL(_read_lock);
77
78unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
79{
80 unsigned long flags;
81
82 local_irq_save(flags);
83 preempt_disable();
84 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
85 /*
86 * On lockdep we dont want the hand-coded irq-enable of
87 * _raw_spin_lock_flags() code, because lockdep assumes
88 * that interrupts are not re-enabled during lock-acquire:
89 */
90#ifdef CONFIG_LOCKDEP
91 LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
92#else 34#else
93 _raw_spin_lock_flags(lock, &flags); 35#define raw_read_can_lock(l) read_can_lock(l)
94#endif 36#define raw_write_can_lock(l) write_can_lock(l)
95 return flags;
96}
97EXPORT_SYMBOL(_spin_lock_irqsave);
98
99void __lockfunc _spin_lock_irq(spinlock_t *lock)
100{
101 local_irq_disable();
102 preempt_disable();
103 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
104 LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
105}
106EXPORT_SYMBOL(_spin_lock_irq);
107
108void __lockfunc _spin_lock_bh(spinlock_t *lock)
109{
110 local_bh_disable();
111 preempt_disable();
112 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
113 LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
114}
115EXPORT_SYMBOL(_spin_lock_bh);
116
117unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock)
118{
119 unsigned long flags;
120
121 local_irq_save(flags);
122 preempt_disable();
123 rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
124 LOCK_CONTENDED_FLAGS(lock, _raw_read_trylock, _raw_read_lock,
125 _raw_read_lock_flags, &flags);
126 return flags;
127}
128EXPORT_SYMBOL(_read_lock_irqsave);
129
130void __lockfunc _read_lock_irq(rwlock_t *lock)
131{
132 local_irq_disable();
133 preempt_disable();
134 rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
135 LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
136}
137EXPORT_SYMBOL(_read_lock_irq);
138
139void __lockfunc _read_lock_bh(rwlock_t *lock)
140{
141 local_bh_disable();
142 preempt_disable();
143 rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
144 LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
145}
146EXPORT_SYMBOL(_read_lock_bh);
147
148unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)
149{
150 unsigned long flags;
151
152 local_irq_save(flags);
153 preempt_disable();
154 rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
155 LOCK_CONTENDED_FLAGS(lock, _raw_write_trylock, _raw_write_lock,
156 _raw_write_lock_flags, &flags);
157 return flags;
158}
159EXPORT_SYMBOL(_write_lock_irqsave);
160
161void __lockfunc _write_lock_irq(rwlock_t *lock)
162{
163 local_irq_disable();
164 preempt_disable();
165 rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
166 LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
167}
168EXPORT_SYMBOL(_write_lock_irq);
169
170void __lockfunc _write_lock_bh(rwlock_t *lock)
171{
172 local_bh_disable();
173 preempt_disable();
174 rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
175 LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
176}
177EXPORT_SYMBOL(_write_lock_bh);
178
179void __lockfunc _spin_lock(spinlock_t *lock)
180{
181 preempt_disable();
182 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
183 LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
184}
185
186EXPORT_SYMBOL(_spin_lock);
187
188void __lockfunc _write_lock(rwlock_t *lock)
189{
190 preempt_disable();
191 rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
192 LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
193}
194
195EXPORT_SYMBOL(_write_lock);
196
197#else /* CONFIG_PREEMPT: */
198
199/* 37/*
38 * We build the __lock_function inlines here. They are too large for
39 * inlining all over the place, but here is only one user per function
40 * which embedds them into the calling _lock_function below.
41 *
200 * This could be a long-held lock. We both prepare to spin for a long 42 * This could be a long-held lock. We both prepare to spin for a long
201 * time (making _this_ CPU preemptable if possible), and we also signal 43 * time (making _this_ CPU preemptable if possible), and we also signal
202 * towards that other CPU that it should break the lock ASAP. 44 * towards that other CPU that it should break the lock ASAP.
203 *
204 * (We do this in a function because inlining it would be excessive.)
205 */ 45 */
206
207#define BUILD_LOCK_OPS(op, locktype) \ 46#define BUILD_LOCK_OPS(op, locktype) \
208void __lockfunc _##op##_lock(locktype##_t *lock) \ 47void __lockfunc __raw_##op##_lock(locktype##_t *lock) \
209{ \ 48{ \
210 for (;;) { \ 49 for (;;) { \
211 preempt_disable(); \ 50 preempt_disable(); \
212 if (likely(_raw_##op##_trylock(lock))) \ 51 if (likely(do_raw_##op##_trylock(lock))) \
213 break; \ 52 break; \
214 preempt_enable(); \ 53 preempt_enable(); \
215 \ 54 \
216 if (!(lock)->break_lock) \ 55 if (!(lock)->break_lock) \
217 (lock)->break_lock = 1; \ 56 (lock)->break_lock = 1; \
218 while (!op##_can_lock(lock) && (lock)->break_lock) \ 57 while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\
219 _raw_##op##_relax(&lock->raw_lock); \ 58 arch_##op##_relax(&lock->raw_lock); \
220 } \ 59 } \
221 (lock)->break_lock = 0; \ 60 (lock)->break_lock = 0; \
222} \ 61} \
223 \ 62 \
224EXPORT_SYMBOL(_##op##_lock); \ 63unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock) \
225 \
226unsigned long __lockfunc _##op##_lock_irqsave(locktype##_t *lock) \
227{ \ 64{ \
228 unsigned long flags; \ 65 unsigned long flags; \
229 \ 66 \
230 for (;;) { \ 67 for (;;) { \
231 preempt_disable(); \ 68 preempt_disable(); \
232 local_irq_save(flags); \ 69 local_irq_save(flags); \
233 if (likely(_raw_##op##_trylock(lock))) \ 70 if (likely(do_raw_##op##_trylock(lock))) \
234 break; \ 71 break; \
235 local_irq_restore(flags); \ 72 local_irq_restore(flags); \
236 preempt_enable(); \ 73 preempt_enable(); \
237 \ 74 \
238 if (!(lock)->break_lock) \ 75 if (!(lock)->break_lock) \
239 (lock)->break_lock = 1; \ 76 (lock)->break_lock = 1; \
240 while (!op##_can_lock(lock) && (lock)->break_lock) \ 77 while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\
241 _raw_##op##_relax(&lock->raw_lock); \ 78 arch_##op##_relax(&lock->raw_lock); \
242 } \ 79 } \
243 (lock)->break_lock = 0; \ 80 (lock)->break_lock = 0; \
244 return flags; \ 81 return flags; \
245} \ 82} \
246 \ 83 \
247EXPORT_SYMBOL(_##op##_lock_irqsave); \ 84void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock) \
248 \
249void __lockfunc _##op##_lock_irq(locktype##_t *lock) \
250{ \ 85{ \
251 _##op##_lock_irqsave(lock); \ 86 _raw_##op##_lock_irqsave(lock); \
252} \ 87} \
253 \ 88 \
254EXPORT_SYMBOL(_##op##_lock_irq); \ 89void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock) \
255 \
256void __lockfunc _##op##_lock_bh(locktype##_t *lock) \
257{ \ 90{ \
258 unsigned long flags; \ 91 unsigned long flags; \
259 \ 92 \
@@ -262,181 +95,284 @@ void __lockfunc _##op##_lock_bh(locktype##_t *lock) \
262 /* irq-disabling. We use the generic preemption-aware */ \ 95 /* irq-disabling. We use the generic preemption-aware */ \
263 /* function: */ \ 96 /* function: */ \
264 /**/ \ 97 /**/ \
265 flags = _##op##_lock_irqsave(lock); \ 98 flags = _raw_##op##_lock_irqsave(lock); \
266 local_bh_disable(); \ 99 local_bh_disable(); \
267 local_irq_restore(flags); \ 100 local_irq_restore(flags); \
268} \ 101} \
269 \
270EXPORT_SYMBOL(_##op##_lock_bh)
271 102
272/* 103/*
273 * Build preemption-friendly versions of the following 104 * Build preemption-friendly versions of the following
274 * lock-spinning functions: 105 * lock-spinning functions:
275 * 106 *
276 * _[spin|read|write]_lock() 107 * __[spin|read|write]_lock()
277 * _[spin|read|write]_lock_irq() 108 * __[spin|read|write]_lock_irq()
278 * _[spin|read|write]_lock_irqsave() 109 * __[spin|read|write]_lock_irqsave()
279 * _[spin|read|write]_lock_bh() 110 * __[spin|read|write]_lock_bh()
280 */ 111 */
281BUILD_LOCK_OPS(spin, spinlock); 112BUILD_LOCK_OPS(spin, raw_spinlock);
282BUILD_LOCK_OPS(read, rwlock); 113BUILD_LOCK_OPS(read, rwlock);
283BUILD_LOCK_OPS(write, rwlock); 114BUILD_LOCK_OPS(write, rwlock);
284 115
285#endif /* CONFIG_PREEMPT */ 116#endif
286 117
287#ifdef CONFIG_DEBUG_LOCK_ALLOC 118#ifndef CONFIG_INLINE_SPIN_TRYLOCK
119int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock)
120{
121 return __raw_spin_trylock(lock);
122}
123EXPORT_SYMBOL(_raw_spin_trylock);
124#endif
288 125
289void __lockfunc _spin_lock_nested(spinlock_t *lock, int subclass) 126#ifndef CONFIG_INLINE_SPIN_TRYLOCK_BH
127int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock)
290{ 128{
291 preempt_disable(); 129 return __raw_spin_trylock_bh(lock);
292 spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
293 LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
294} 130}
295EXPORT_SYMBOL(_spin_lock_nested); 131EXPORT_SYMBOL(_raw_spin_trylock_bh);
132#endif
296 133
297unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass) 134#ifndef CONFIG_INLINE_SPIN_LOCK
135void __lockfunc _raw_spin_lock(raw_spinlock_t *lock)
298{ 136{
299 unsigned long flags; 137 __raw_spin_lock(lock);
138}
139EXPORT_SYMBOL(_raw_spin_lock);
140#endif
300 141
301 local_irq_save(flags); 142#ifndef CONFIG_INLINE_SPIN_LOCK_IRQSAVE
302 preempt_disable(); 143unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
303 spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_); 144{
304 LOCK_CONTENDED_FLAGS(lock, _raw_spin_trylock, _raw_spin_lock, 145 return __raw_spin_lock_irqsave(lock);
305 _raw_spin_lock_flags, &flags);
306 return flags;
307} 146}
308EXPORT_SYMBOL(_spin_lock_irqsave_nested); 147EXPORT_SYMBOL(_raw_spin_lock_irqsave);
148#endif
309 149
310void __lockfunc _spin_lock_nest_lock(spinlock_t *lock, 150#ifndef CONFIG_INLINE_SPIN_LOCK_IRQ
311 struct lockdep_map *nest_lock) 151void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
312{ 152{
313 preempt_disable(); 153 __raw_spin_lock_irq(lock);
314 spin_acquire_nest(&lock->dep_map, 0, 0, nest_lock, _RET_IP_); 154}
315 LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock); 155EXPORT_SYMBOL(_raw_spin_lock_irq);
156#endif
157
158#ifndef CONFIG_INLINE_SPIN_LOCK_BH
159void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)
160{
161 __raw_spin_lock_bh(lock);
162}
163EXPORT_SYMBOL(_raw_spin_lock_bh);
164#endif
165
166#ifndef CONFIG_INLINE_SPIN_UNLOCK
167void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock)
168{
169 __raw_spin_unlock(lock);
316} 170}
317EXPORT_SYMBOL(_spin_lock_nest_lock); 171EXPORT_SYMBOL(_raw_spin_unlock);
172#endif
318 173
174#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE
175void __lockfunc _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
176{
177 __raw_spin_unlock_irqrestore(lock, flags);
178}
179EXPORT_SYMBOL(_raw_spin_unlock_irqrestore);
319#endif 180#endif
320 181
321void __lockfunc _spin_unlock(spinlock_t *lock) 182#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQ
183void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock)
322{ 184{
323 spin_release(&lock->dep_map, 1, _RET_IP_); 185 __raw_spin_unlock_irq(lock);
324 _raw_spin_unlock(lock);
325 preempt_enable();
326} 186}
327EXPORT_SYMBOL(_spin_unlock); 187EXPORT_SYMBOL(_raw_spin_unlock_irq);
188#endif
328 189
329void __lockfunc _write_unlock(rwlock_t *lock) 190#ifndef CONFIG_INLINE_SPIN_UNLOCK_BH
191void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock)
330{ 192{
331 rwlock_release(&lock->dep_map, 1, _RET_IP_); 193 __raw_spin_unlock_bh(lock);
332 _raw_write_unlock(lock);
333 preempt_enable();
334} 194}
335EXPORT_SYMBOL(_write_unlock); 195EXPORT_SYMBOL(_raw_spin_unlock_bh);
196#endif
336 197
337void __lockfunc _read_unlock(rwlock_t *lock) 198#ifndef CONFIG_INLINE_READ_TRYLOCK
199int __lockfunc _raw_read_trylock(rwlock_t *lock)
338{ 200{
339 rwlock_release(&lock->dep_map, 1, _RET_IP_); 201 return __raw_read_trylock(lock);
340 _raw_read_unlock(lock);
341 preempt_enable();
342} 202}
343EXPORT_SYMBOL(_read_unlock); 203EXPORT_SYMBOL(_raw_read_trylock);
204#endif
344 205
345void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags) 206#ifndef CONFIG_INLINE_READ_LOCK
207void __lockfunc _raw_read_lock(rwlock_t *lock)
346{ 208{
347 spin_release(&lock->dep_map, 1, _RET_IP_); 209 __raw_read_lock(lock);
348 _raw_spin_unlock(lock);
349 local_irq_restore(flags);
350 preempt_enable();
351} 210}
352EXPORT_SYMBOL(_spin_unlock_irqrestore); 211EXPORT_SYMBOL(_raw_read_lock);
212#endif
353 213
354void __lockfunc _spin_unlock_irq(spinlock_t *lock) 214#ifndef CONFIG_INLINE_READ_LOCK_IRQSAVE
215unsigned long __lockfunc _raw_read_lock_irqsave(rwlock_t *lock)
355{ 216{
356 spin_release(&lock->dep_map, 1, _RET_IP_); 217 return __raw_read_lock_irqsave(lock);
357 _raw_spin_unlock(lock);
358 local_irq_enable();
359 preempt_enable();
360} 218}
361EXPORT_SYMBOL(_spin_unlock_irq); 219EXPORT_SYMBOL(_raw_read_lock_irqsave);
220#endif
362 221
363void __lockfunc _spin_unlock_bh(spinlock_t *lock) 222#ifndef CONFIG_INLINE_READ_LOCK_IRQ
223void __lockfunc _raw_read_lock_irq(rwlock_t *lock)
364{ 224{
365 spin_release(&lock->dep_map, 1, _RET_IP_); 225 __raw_read_lock_irq(lock);
366 _raw_spin_unlock(lock);
367 preempt_enable_no_resched();
368 local_bh_enable_ip((unsigned long)__builtin_return_address(0));
369} 226}
370EXPORT_SYMBOL(_spin_unlock_bh); 227EXPORT_SYMBOL(_raw_read_lock_irq);
228#endif
371 229
372void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags) 230#ifndef CONFIG_INLINE_READ_LOCK_BH
231void __lockfunc _raw_read_lock_bh(rwlock_t *lock)
373{ 232{
374 rwlock_release(&lock->dep_map, 1, _RET_IP_); 233 __raw_read_lock_bh(lock);
375 _raw_read_unlock(lock);
376 local_irq_restore(flags);
377 preempt_enable();
378} 234}
379EXPORT_SYMBOL(_read_unlock_irqrestore); 235EXPORT_SYMBOL(_raw_read_lock_bh);
236#endif
380 237
381void __lockfunc _read_unlock_irq(rwlock_t *lock) 238#ifndef CONFIG_INLINE_READ_UNLOCK
239void __lockfunc _raw_read_unlock(rwlock_t *lock)
382{ 240{
383 rwlock_release(&lock->dep_map, 1, _RET_IP_); 241 __raw_read_unlock(lock);
384 _raw_read_unlock(lock);
385 local_irq_enable();
386 preempt_enable();
387} 242}
388EXPORT_SYMBOL(_read_unlock_irq); 243EXPORT_SYMBOL(_raw_read_unlock);
244#endif
389 245
390void __lockfunc _read_unlock_bh(rwlock_t *lock) 246#ifndef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE
247void __lockfunc _raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
391{ 248{
392 rwlock_release(&lock->dep_map, 1, _RET_IP_); 249 __raw_read_unlock_irqrestore(lock, flags);
393 _raw_read_unlock(lock);
394 preempt_enable_no_resched();
395 local_bh_enable_ip((unsigned long)__builtin_return_address(0));
396} 250}
397EXPORT_SYMBOL(_read_unlock_bh); 251EXPORT_SYMBOL(_raw_read_unlock_irqrestore);
252#endif
398 253
399void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags) 254#ifndef CONFIG_INLINE_READ_UNLOCK_IRQ
255void __lockfunc _raw_read_unlock_irq(rwlock_t *lock)
400{ 256{
401 rwlock_release(&lock->dep_map, 1, _RET_IP_); 257 __raw_read_unlock_irq(lock);
402 _raw_write_unlock(lock);
403 local_irq_restore(flags);
404 preempt_enable();
405} 258}
406EXPORT_SYMBOL(_write_unlock_irqrestore); 259EXPORT_SYMBOL(_raw_read_unlock_irq);
260#endif
407 261
408void __lockfunc _write_unlock_irq(rwlock_t *lock) 262#ifndef CONFIG_INLINE_READ_UNLOCK_BH
263void __lockfunc _raw_read_unlock_bh(rwlock_t *lock)
409{ 264{
410 rwlock_release(&lock->dep_map, 1, _RET_IP_); 265 __raw_read_unlock_bh(lock);
411 _raw_write_unlock(lock);
412 local_irq_enable();
413 preempt_enable();
414} 266}
415EXPORT_SYMBOL(_write_unlock_irq); 267EXPORT_SYMBOL(_raw_read_unlock_bh);
268#endif
416 269
417void __lockfunc _write_unlock_bh(rwlock_t *lock) 270#ifndef CONFIG_INLINE_WRITE_TRYLOCK
271int __lockfunc _raw_write_trylock(rwlock_t *lock)
418{ 272{
419 rwlock_release(&lock->dep_map, 1, _RET_IP_); 273 return __raw_write_trylock(lock);
420 _raw_write_unlock(lock);
421 preempt_enable_no_resched();
422 local_bh_enable_ip((unsigned long)__builtin_return_address(0));
423} 274}
424EXPORT_SYMBOL(_write_unlock_bh); 275EXPORT_SYMBOL(_raw_write_trylock);
276#endif
425 277
426int __lockfunc _spin_trylock_bh(spinlock_t *lock) 278#ifndef CONFIG_INLINE_WRITE_LOCK
279void __lockfunc _raw_write_lock(rwlock_t *lock)
427{ 280{
428 local_bh_disable(); 281 __raw_write_lock(lock);
282}
283EXPORT_SYMBOL(_raw_write_lock);
284#endif
285
286#ifndef CONFIG_INLINE_WRITE_LOCK_IRQSAVE
287unsigned long __lockfunc _raw_write_lock_irqsave(rwlock_t *lock)
288{
289 return __raw_write_lock_irqsave(lock);
290}
291EXPORT_SYMBOL(_raw_write_lock_irqsave);
292#endif
293
294#ifndef CONFIG_INLINE_WRITE_LOCK_IRQ
295void __lockfunc _raw_write_lock_irq(rwlock_t *lock)
296{
297 __raw_write_lock_irq(lock);
298}
299EXPORT_SYMBOL(_raw_write_lock_irq);
300#endif
301
302#ifndef CONFIG_INLINE_WRITE_LOCK_BH
303void __lockfunc _raw_write_lock_bh(rwlock_t *lock)
304{
305 __raw_write_lock_bh(lock);
306}
307EXPORT_SYMBOL(_raw_write_lock_bh);
308#endif
309
310#ifndef CONFIG_INLINE_WRITE_UNLOCK
311void __lockfunc _raw_write_unlock(rwlock_t *lock)
312{
313 __raw_write_unlock(lock);
314}
315EXPORT_SYMBOL(_raw_write_unlock);
316#endif
317
318#ifndef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE
319void __lockfunc _raw_write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
320{
321 __raw_write_unlock_irqrestore(lock, flags);
322}
323EXPORT_SYMBOL(_raw_write_unlock_irqrestore);
324#endif
325
326#ifndef CONFIG_INLINE_WRITE_UNLOCK_IRQ
327void __lockfunc _raw_write_unlock_irq(rwlock_t *lock)
328{
329 __raw_write_unlock_irq(lock);
330}
331EXPORT_SYMBOL(_raw_write_unlock_irq);
332#endif
333
334#ifndef CONFIG_INLINE_WRITE_UNLOCK_BH
335void __lockfunc _raw_write_unlock_bh(rwlock_t *lock)
336{
337 __raw_write_unlock_bh(lock);
338}
339EXPORT_SYMBOL(_raw_write_unlock_bh);
340#endif
341
342#ifdef CONFIG_DEBUG_LOCK_ALLOC
343
344void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass)
345{
346 preempt_disable();
347 spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
348 LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
349}
350EXPORT_SYMBOL(_raw_spin_lock_nested);
351
352unsigned long __lockfunc _raw_spin_lock_irqsave_nested(raw_spinlock_t *lock,
353 int subclass)
354{
355 unsigned long flags;
356
357 local_irq_save(flags);
429 preempt_disable(); 358 preempt_disable();
430 if (_raw_spin_trylock(lock)) { 359 spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
431 spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); 360 LOCK_CONTENDED_FLAGS(lock, do_raw_spin_trylock, do_raw_spin_lock,
432 return 1; 361 do_raw_spin_lock_flags, &flags);
433 } 362 return flags;
363}
364EXPORT_SYMBOL(_raw_spin_lock_irqsave_nested);
434 365
435 preempt_enable_no_resched(); 366void __lockfunc _raw_spin_lock_nest_lock(raw_spinlock_t *lock,
436 local_bh_enable_ip((unsigned long)__builtin_return_address(0)); 367 struct lockdep_map *nest_lock)
437 return 0; 368{
369 preempt_disable();
370 spin_acquire_nest(&lock->dep_map, 0, 0, nest_lock, _RET_IP_);
371 LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
438} 372}
439EXPORT_SYMBOL(_spin_trylock_bh); 373EXPORT_SYMBOL(_raw_spin_lock_nest_lock);
374
375#endif
440 376
441notrace int in_lock_functions(unsigned long addr) 377notrace int in_lock_functions(unsigned long addr)
442{ 378{