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| author | Jonathan Brassow <jbrassow@redhat.com> | 2013-03-07 16:22:01 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-28 12:18:01 -0700 |
| commit | a9e9cfa2ec38992da5db7c60c651e2e8dce7e393 (patch) | |
| tree | 1be85ad0e2cd1c4214ec595557ca6ab07b403550 /fs/posix_acl.c | |
| parent | bcfe2cfc58bc50d69854365871526e243cd83f19 (diff) | |
MD RAID5: Avoid accessing gendisk or queue structs when not available
commit e3620a3ad52609f64a2402e4b59300afb4b83b77 upstream.
MD RAID5: Fix kernel oops when RAID4/5/6 is used via device-mapper
Commit a9add5d (v3.8-rc1) added blktrace calls to the RAID4/5/6 driver.
However, when device-mapper is used to create RAID4/5/6 arrays, the
mddev->gendisk and mddev->queue fields are not setup. Therefore, calling
things like trace_block_bio_remap will cause a kernel oops. This patch
conditionalizes those calls on whether the proper fields exist to make
the calls. (Device-mapper will call trace_block_bio_remap on its own.)
This patch is suitable for the 3.8.y stable kernel.
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/posix_acl.c')
0 files changed, 0 insertions, 0 deletions