Commit-ID: 51dfacdef38b1dd6fc58b03dd1725d517516b115
Gitweb: http://git.kernel.org/tip/51dfacdef38b1dd6fc58b03dd1725d517516b115
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Sat, 16 Oct 2010 22:34:39 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Sat, 30 Oct 2010 12:12:50 +0200
jbd2: Convert jbd2_slab_create_sem to mutex
jbd2_slab_create_sem is used as a mutex, so make it one.
[ akpm muttered: We may as well make it local to
jbd2_journal_create_slab() also. ]
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ted Ts'o <tytso@xxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
LKML-Reference: <alpine.LFD.2.00.1010162231480.2496@xxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
fs/jbd2/journal.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 538417c..c590d15 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1838,7 +1838,6 @@ size_t journal_tag_bytes(journal_t *journal)
*/
#define JBD2_MAX_SLABS 8
static struct kmem_cache *jbd2_slab[JBD2_MAX_SLABS];
-static DECLARE_MUTEX(jbd2_slab_create_sem);
static const char *jbd2_slab_names[JBD2_MAX_SLABS] = {
"jbd2_1k", "jbd2_2k", "jbd2_4k", "jbd2_8k",
@@ -1859,6 +1858,7 @@ static void jbd2_journal_destroy_slabs(void)
static int jbd2_journal_create_slab(size_t size)
{
+ static DEFINE_MUTEX(jbd2_slab_create_mutex);
int i = order_base_2(size) - 10;
size_t slab_size;
@@ -1870,16 +1870,16 @@ static int jbd2_journal_create_slab(size_t size)
if (unlikely(i < 0))
i = 0;
- down(&jbd2_slab_create_sem);
+ mutex_lock(&jbd2_slab_create_mutex);
if (jbd2_slab[i]) {
- up(&jbd2_slab_create_sem);
+ mutex_unlock(&jbd2_slab_create_mutex);
return 0; /* Already created */
}
slab_size = 1 << (i+10);
jbd2_slab[i] = kmem_cache_create(jbd2_slab_names[i], slab_size,
slab_size, 0, NULL);
- up(&jbd2_slab_create_sem);
+ mutex_unlock(&jbd2_slab_create_mutex);
if (!jbd2_slab[i]) {
printk(KERN_EMERG "JBD2: no memory for jbd2_slab cache\n");
return -ENOMEM;
--
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