Commit 637842cf authored by David Teigland's avatar David Teigland Committed by Linus Torvalds
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[PATCH] device-mapper: add dm_find_md 



Abstract dm_find_md() from dm_get_mdptr() to allow use elsewhere.

Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 9f708e40

drivers/md/dm.c

+14 −5
Original line number Diff line number Diff line
@@ -902,10 +902,9 @@ int dm_create_with_minor(unsigned int minor, struct mapped_device **result) 
	return create_aux(minor, 1, result);

}



void *dm_get_mdptr(dev_t dev)

static struct mapped_device *dm_find_md(dev_t dev)

{

	struct mapped_device *md;

	void *mdptr = NULL;

	unsigned minor = MINOR(dev);



	if (MAJOR(dev) != _major || minor >= (1 << MINORBITS))
@@ -914,12 +913,22 @@ void *dm_get_mdptr(dev_t dev) 
	down(&_minor_lock);



	md = idr_find(&_minor_idr, minor);



	if (md && (dm_disk(md)->first_minor == minor))

		mdptr = md->interface_ptr;

	if (!md || (dm_disk(md)->first_minor != minor))

		md = NULL;



	up(&_minor_lock);



	return md;

}



void *dm_get_mdptr(dev_t dev)

{

	struct mapped_device *md;

	void *mdptr = NULL;



	md = dm_find_md(dev);

	if (md)

		mdptr = md->interface_ptr;

	return mdptr;

}