Hello Alasdair,
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.
Regards,
Frederik
Signed-off-by: Frederik Deweerdt <frederik.deweerdt@xxxxxxxxx>
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 11f4ffe..a4b217e 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;
@@ -993,7 +993,7 @@ 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 +1006,12 @@ 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);
--
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