lockdep, rwsem: fix down_write_nest_lock() if !CONFIG_DEBUG_LOCK_ALLOC

Commit 1b963c8 ("lockdep, rwsem: provide down_write_nest_lock()") contains a bug in a codepath when CONFIG_DEBUG_LOCK_ALLOC is disabled, which causes down_read() to be called instead of down_write() by mistake on such configurations. Fix that. Reported-and-tested-by: Andrew Clayton <[email protected]> Reported-and-tested-by: Zlatko Calusic <[email protected]> Signed-off-by: Jiri Kosina <[email protected]> Reviewed-by: Rik van Riel <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
akeromi · Jan 16, 2013 · e65b9ad · e65b9ad
1 parent 36e7a96
commit e65b9ad
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h
@@ -135,7 +135,7 @@ do {								\
 
 #else
 # define down_read_nested(sem, subclass)		down_read(sem)
-# define down_write_nest_lock(sem, nest_lock)	down_read(sem)
+# define down_write_nest_lock(sem, nest_lock)	down_write(sem)
 # define down_write_nested(sem, subclass)	down_write(sem)
 #endif