| commit | c46501b2deaa06efcaaf82917281941f02c6b307 | [log] [tgz] |
|---|---|---|
| author | NeilBrown <neilb@suse.de> | Tue Aug 27 15:52:13 2013 +1000 |
| committer | NeilBrown <neilb@suse.de> | Wed Aug 28 16:58:36 2013 +1000 |
| tree | bafe1a096cda8f657074d59cec815b7ae717cd96 | |
| parent | b721420e8719131896b009b11edbbd27d9b85e98 [diff] |
md/raid5: use seqcount to protect access to shape in make_request. make_request() access various shape parameters (raid_disks, chunk_size etc) which might be changed by raid5_start_reshape(). If the later is called at and awkward time during the form, the wrong stripe_head might be used. So introduce a 'seqcount' and after finding a stripe_head make sure there is no reason to expect that we got the wrong one. Signed-off-by: NeilBrown <neilb@suse.de>