Messages in this thread Patch in this message | | | Date | Fri, 18 Nov 2005 14:58:37 +0000 | From | Alasdair G Kergon <> | Subject | [PATCH] device-mapper: add dm_find_md |
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Abstract dm_find_md() from dm_get_mdptr() to allow use elsewhere.
From: David Teigland <teigland@redhat.com> Signed-Off-By: Alasdair G Kergon <agk@redhat.com>
Index: linux-2.6.14/drivers/md/dm.c =================================================================== --- linux-2.6.14.orig/drivers/md/dm.c 2005-11-18 14:40:40.000000000 +0000 +++ linux-2.6.14/drivers/md/dm.c 2005-11-18 14:40:48.000000000 +0000 @@ -913,10 +913,9 @@ int dm_create_with_minor(unsigned int mi 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)) @@ -925,12 +924,22 @@ 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; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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