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| author | Gu Zheng <guz.fnst@cn.fujitsu.com> | 2014-12-03 10:19:52 +0800 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2015-01-07 12:51:56 -0800 |
| commit | 362376a7c65936835f39ff29b082a646d522efbc (patch) | |
| tree | 572f5ca2d9d560e265a31f198b5c8ef2e6810553 /drivers/mtd/mtdblock.c | |
| parent | 0b56d2d45e7c27581ca90f36b4317373f23e7622 (diff) | |
| download | linux-stable-362376a7c65936835f39ff29b082a646d522efbc.tar.gz linux-stable-362376a7c65936835f39ff29b082a646d522efbc.tar.bz2 linux-stable-362376a7c65936835f39ff29b082a646d522efbc.zip | |
mtd: mtdblock: remove the needless mtdblks_lock
The global lock mtdblks_lock was used to protect the original mtdblks
array to avoid race conditions. As the mtdblks array was already gone,
but the mtdblks_lock is left, and it causes latency when open/release dev.
So we need to remove it here.
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd/mtdblock.c')
| -rw-r--r-- | drivers/mtd/mtdblock.c | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/drivers/mtd/mtdblock.c b/drivers/mtd/mtdblock.c index 485ea751c7f9..bb4c14f83c75 100644 --- a/drivers/mtd/mtdblock.c +++ b/drivers/mtd/mtdblock.c @@ -45,8 +45,6 @@ struct mtdblk_dev { enum { STATE_EMPTY, STATE_CLEAN, STATE_DIRTY } cache_state; }; -static DEFINE_MUTEX(mtdblks_lock); - /* * Cache stuff... * @@ -286,10 +284,8 @@ static int mtdblock_open(struct mtd_blktrans_dev *mbd) pr_debug("mtdblock_open\n"); - mutex_lock(&mtdblks_lock); if (mtdblk->count) { mtdblk->count++; - mutex_unlock(&mtdblks_lock); return 0; } @@ -302,8 +298,6 @@ static int mtdblock_open(struct mtd_blktrans_dev *mbd) mtdblk->cache_data = NULL; } - mutex_unlock(&mtdblks_lock); - pr_debug("ok\n"); return 0; @@ -315,8 +309,6 @@ static void mtdblock_release(struct mtd_blktrans_dev *mbd) pr_debug("mtdblock_release\n"); - mutex_lock(&mtdblks_lock); - mutex_lock(&mtdblk->cache_mutex); write_cached_data(mtdblk); mutex_unlock(&mtdblk->cache_mutex); @@ -331,8 +323,6 @@ static void mtdblock_release(struct mtd_blktrans_dev *mbd) vfree(mtdblk->cache_data); } - mutex_unlock(&mtdblks_lock); - pr_debug("ok\n"); } |