Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...

[linux.git] / lib / kernel_lock.c

diff --git a/lib/kernel_lock.c b/lib/kernel_lock.c
index bd2bc5d887b815e261ff82c4167e410966b659d3..e0fdfddb406ec3975673f150f46bd3302bc08599 100644 (file)
--- a/lib/kernel_lock.c
+++ b/lib/kernel_lock.c
@@ -14,7 +14,7 @@
  * The 'big kernel semaphore'
  *
  * This mutex is taken and released recursively by lock_kernel()
- * and unlock_kernel().  It is transparently dropped and reaquired
+ * and unlock_kernel().  It is transparently dropped and reacquired
  * over schedule().  It is used to protect legacy code that hasn't
  * been migrated to a proper locking design yet.
  *
@@ -92,7 +92,7 @@ void __lockfunc unlock_kernel(void)
  * The 'big kernel lock'
  *
  * This spinlock is taken and released recursively by lock_kernel()
- * and unlock_kernel().  It is transparently dropped and reaquired
+ * and unlock_kernel().  It is transparently dropped and reacquired
  * over schedule().  It is used to protect legacy code that hasn't
  * been migrated to a proper locking design yet.
  *
@@ -177,6 +177,10 @@ static inline void __lock_kernel(void)
 
 static inline void __unlock_kernel(void)
 {
+       /*
+        * the BKL is not covered by lockdep, so we open-code the
+        * unlocking sequence (and thus avoid the dep-chain ops):
+        */
        _raw_spin_unlock(&kernel_flag);
        preempt_enable();
 }