aboutsummaryrefslogtreecommitdiffstats
path: root/lib
diff options
context:
space:
mode:
Diffstat (limited to 'lib')
-rw-r--r--lib/spinlock_debug.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/spinlock_debug.c b/lib/spinlock_debug.c
index 3d9c4dc965ed..58c577dd82e5 100644
--- a/lib/spinlock_debug.c
+++ b/lib/spinlock_debug.c
@@ -162,6 +162,7 @@ static void rwlock_bug(rwlock_t *lock, const char *msg)
162 162
163#define RWLOCK_BUG_ON(cond, lock, msg) if (unlikely(cond)) rwlock_bug(lock, msg) 163#define RWLOCK_BUG_ON(cond, lock, msg) if (unlikely(cond)) rwlock_bug(lock, msg)
164 164
165#if 0 /* __write_lock_debug() can lock up - maybe this can too? */
165static void __read_lock_debug(rwlock_t *lock) 166static void __read_lock_debug(rwlock_t *lock)
166{ 167{
167 int print_once = 1; 168 int print_once = 1;
@@ -184,12 +185,12 @@ static void __read_lock_debug(rwlock_t *lock)
184 } 185 }
185 } 186 }
186} 187}
188#endif
187 189
188void _raw_read_lock(rwlock_t *lock) 190void _raw_read_lock(rwlock_t *lock)
189{ 191{
190 RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic"); 192 RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");
191 if (unlikely(!__raw_read_trylock(&lock->raw_lock))) 193 __raw_read_lock(&lock->raw_lock);
192 __read_lock_debug(lock);
193} 194}
194 195
195int _raw_read_trylock(rwlock_t *lock) 196int _raw_read_trylock(rwlock_t *lock)
@@ -235,6 +236,7 @@ static inline void debug_write_unlock(rwlock_t *lock)
235 lock->owner_cpu = -1; 236 lock->owner_cpu = -1;
236} 237}
237 238
239#if 0 /* This can cause lockups */
238static void __write_lock_debug(rwlock_t *lock) 240static void __write_lock_debug(rwlock_t *lock)
239{ 241{
240 int print_once = 1; 242 int print_once = 1;
@@ -257,12 +259,12 @@ static void __write_lock_debug(rwlock_t *lock)
257 } 259 }
258 } 260 }
259} 261}
262#endif
260 263
261void _raw_write_lock(rwlock_t *lock) 264void _raw_write_lock(rwlock_t *lock)
262{ 265{
263 debug_write_lock_before(lock); 266 debug_write_lock_before(lock);
264 if (unlikely(!__raw_write_trylock(&lock->raw_lock))) 267 __raw_write_lock(&lock->raw_lock);
265 __write_lock_debug(lock);
266 debug_write_lock_after(lock); 268 debug_write_lock_after(lock);
267} 269}
268 270