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[PATCH] convert ext3's truncate_sem to a mutex

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ext3's truncate_sem is always released in the same function it's taken
and it otherwise is a mutex as well..

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Arjan van de Ven
2006-03-23 03:00:42 -08:00
committed by Linus Torvalds
parent 7bf6d78dd9
commit 9746151861
5 changed files with 16 additions and 15 deletions
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7
include/linux/ext3_fs_i.h
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@ -19,6 +19,7 @@
#include <linux/rwsem.h>
#include <linux/rbtree.h>
#include <linux/seqlock.h>
#include <linux/mutex.h>
struct ext3_reserve_window {
__u32 _rsv_start; /* First byte reserved */
@ -122,16 +123,16 @@ struct ext3_inode_info {
__u16 i_extra_isize;
/*
* truncate_sem is for serialising ext3_truncate() against
* truncate_mutex is for serialising ext3_truncate() against
* ext3_getblock(). In the 2.4 ext2 design, great chunks of inode's
* data tree are chopped off during truncate. We can't do that in
* ext3 because whenever we perform intermediate commits during
* truncate, the inode and all the metadata blocks *must* be in a
* consistent state which allows truncation of the orphans to restart
* during recovery. Hence we must fix the get_block-vs-truncate race
* by other means, so we have truncate_sem.
* by other means, so we have truncate_mutex.
*/
struct semaphore truncate_sem;
struct mutex truncate_mutex;
struct inode vfs_inode;
};