[PATCH] lockdep, rwsem: fix down_write_nest_lock() if!CONFIG_DEBUG_LOCK_ALLOC

[Jiri Kosina]

Commit 1b963c81b1 ("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-by: Andrew Clayton <andrew@xxxxxxxxxxxxxxxxxx>
Reported-by: Zlatko Calusic <zlatko.calusic@xxxxxxxx>
Tested-by: Andrew Clayton <andrew@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
---
 include/linux/rwsem.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h
index 413cc11..8da67d6 100644
--- 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
 
-- 
Jiri Kosina
SUSE Labs
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