From: Ingo Molnar <[email protected]>
teach special (rwsem-in-irq) locking code to the lock validator. Has no
effect on non-lockdep kernels.
Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Arjan van de Ven <[email protected]>
---
---
fs/direct-io.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
Index: linux/fs/direct-io.c
===================================================================
--- linux.orig/fs/direct-io.c
+++ linux/fs/direct-io.c
@@ -220,7 +220,8 @@ static void dio_complete(struct dio *dio
if (dio->end_io && dio->result)
dio->end_io(dio->iocb, offset, bytes, dio->map_bh.b_private);
if (dio->lock_type == DIO_LOCKING)
- up_read(&dio->inode->i_alloc_sem);
+ /* lockdep: non-owner release */
+ up_read_non_owner(&dio->inode->i_alloc_sem);
}
/*
@@ -1261,7 +1262,8 @@ __blockdev_direct_IO(int rw, struct kioc
}
if (dio_lock_type == DIO_LOCKING)
- down_read(&inode->i_alloc_sem);
+ /* lockdep: not the owner will release it */
+ down_read_non_owner(&inode->i_alloc_sem);
}
/*
-
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