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| author | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2015-07-22 12:09:17 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-03 09:29:13 -0700 |
| commit | 7640ca524e936f7e47dc8ecbc463ea1876346f4d (patch) | |
| tree | fd3271b4627691dd8b4e5885946ded82b7ddd5e8 /drivers/hwmon/abx500.c | |
| parent | 0f9457afe159aee56f80b20fff27a6af60f2b7a1 (diff) | |
md: Skip cluster setup for dm-raid
commit d3b178adb3a3adf54ecf77758138b654c3ee7f09 upstream.
There is a bug that the bitmap superblock isn't initialised properly for
dm-raid, so a new field can have garbage in new fields.
(dm-raid does initialisation in the kernel - md initialised the
superblock in mdadm).
This means that for dm-raid we cannot currently trust the new ->nodes
field. So:
- use __GFP_ZERO to initialise the superblock properly for all new
arrays
- initialise all fields in bitmap_info in bitmap_new_disk_sb
- ignore ->nodes for dm arrays (yes, this is a hack)
This bug exposes dm-raid to bug in the (still experimental) md-cluster
code, so it is suitable for -stable. It does cause crashes.
References: https://bugzilla.kernel.org/show_bug.cgi?id=100491
Signed-off-By: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwmon/abx500.c')
0 files changed, 0 insertions, 0 deletions