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authorMike Snitzer <snitzer@redhat.com>2014-01-31 23:11:54 +0400
committerMike Snitzer <snitzer@redhat.com>2014-02-17 20:00:05 +0400
commitc6eda5e81c4fcc77185117255c7419eda771f67f (patch)
tree4736ef966a154b8a96820a345db96bd6284c69a7 /drivers/md/dm-cache-target.c
parent6d0abeca3242a88cab8232e4acd7e2bf088f3bc2 (diff)
downloadlinux-c6eda5e81c4fcc77185117255c7419eda771f67f.tar.xz
dm cache: move hook_info into common portion of per_bio_data structure
Commit c9d28d5d ("dm cache: promotion optimisation for writes") incorrectly placed the 'hook_info' member in the writethrough-only portion of the per_bio_data structure. Given that the overwrite optimization may be used for writeback the 'hook_info' member must be placed above the 'cache' member of the per_bio_data structure. Any members above 'cache' are available from both writeback and writethrough modes' per_bio_data structure. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Acked-by: Joe Thornber <ejt@redhat.com> Cc: stable@vger.kernel.org # 3.13+
Diffstat (limited to 'drivers/md/dm-cache-target.c')
-rw-r--r--drivers/md/dm-cache-target.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index ffd472e015ca..14256b7fce79 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -289,6 +289,7 @@ struct per_bio_data {
bool tick:1;
unsigned req_nr:2;
struct dm_deferred_entry *all_io_entry;
+ struct dm_hook_info hook_info;
/*
* writethrough fields. These MUST remain at the end of this
@@ -297,7 +298,6 @@ struct per_bio_data {
*/
struct cache *cache;
dm_cblock_t cblock;
- struct dm_hook_info hook_info;
struct dm_bio_details bio_details;
};