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authorFrederik Deweerdt <frederik.deweerdt@gmail.com>2008-04-24 22:10:59 +0100
committerAlasdair G Kergon <agk@redhat.com>2008-04-25 13:27:02 +0100
commitcf13ab8e02d452e2236d0b5fda9972b3b7f503cb (patch)
tree135509aa2852deebba7b4a81cdafc2a2ee2e358f /drivers/md/dm.c
parent4fdfe401e9d7e30029972d568c667234c0c1d828 (diff)
dm: remove md argument from specific_minor
The small patch below: - Removes the unused md argument from both specific_minor() and next_free_minor() - Folds kmalloc + memset(0) into a single kzalloc call in alloc_dev() This has been compile tested on x86. Signed-off-by: Frederik Deweerdt <frederik.deweerdt@gmail.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm.c')
-rw-r--r--drivers/md/dm.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 11f4ffedd64..372369b1cc2 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -924,7 +924,7 @@ static void free_minor(int minor)
/*
* See if the device with a specific minor # is free.
*/
-static int specific_minor(struct mapped_device *md, int minor)
+static int specific_minor(int minor)
{
int r, m;
@@ -957,7 +957,7 @@ out:
return r;
}
-static int next_free_minor(struct mapped_device *md, int *minor)
+static int next_free_minor(int *minor)
{
int r, m;
@@ -968,9 +968,8 @@ static int next_free_minor(struct mapped_device *md, int *minor)
spin_lock(&_minor_lock);
r = idr_get_new(&_minor_idr, MINOR_ALLOCED, &m);
- if (r) {
+ if (r)
goto out;
- }
if (m >= (1 << MINORBITS)) {
idr_remove(&_minor_idr, m);
@@ -993,7 +992,7 @@ static struct block_device_operations dm_blk_dops;
static struct mapped_device *alloc_dev(int minor)
{
int r;
- struct mapped_device *md = kmalloc(sizeof(*md), GFP_KERNEL);
+ struct mapped_device *md = kzalloc(sizeof(*md), GFP_KERNEL);
void *old_md;
if (!md) {
@@ -1006,13 +1005,12 @@ static struct mapped_device *alloc_dev(int minor)
/* get a minor number for the dev */
if (minor == DM_ANY_MINOR)
- r = next_free_minor(md, &minor);
+ r = next_free_minor(&minor);
else
- r = specific_minor(md, minor);
+ r = specific_minor(minor);
if (r < 0)
goto bad_minor;
- memset(md, 0, sizeof(*md));
init_rwsem(&md->io_lock);
mutex_init(&md->suspend_lock);
spin_lock_init(&md->pushback_lock);