| commit | 10da4f795f965f22039aa2930b6f80964aad3ee5 | |
| author | Jeff Mahoney <jeffm@suse.com> | |
| Mon, 26 Jun 2006 07:27:25 +0000 (26 00:27 -0700) | ||
| committer | Linus Torvalds <torvalds@g5.osdl.org> | |
| Mon, 26 Jun 2006 16:58:35 +0000 (26 09:58 -0700) | ||
| tree | 6f4bfd27cdcdad15b53df997476fae539383bf4a | treesnapshot (tar.gz zip) |
| parent | 7ec75f254742766eb729f1d1024a5b4e6692fc5f | commitdiff |
[PATCH] dm: add module ref counting
The reference counting on dm-mod is zero if no mapped devices are open. This
is incorrect, and can lead to an oops if the module is unloaded while mapped
devices exist.
This patch claims a reference to the module whenever a device is created, and
drops it again when the device is freed.
Devices must be removed before dm-mod is unloaded.
[akpm: too late for 2.6.17 - suitable for 2.6.17.x after it has settled]
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
The reference counting on dm-mod is zero if no mapped devices are open. This
is incorrect, and can lead to an oops if the module is unloaded while mapped
devices exist.
This patch claims a reference to the module whenever a device is created, and
drops it again when the device is freed.
Devices must be removed before dm-mod is unloaded.
[akpm: too late for 2.6.17 - suitable for 2.6.17.x after it has settled]
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| drivers/md/dm.c | diffblobblamehistory |