blk: Ensure users for current->bio_list can see the full list.
authorNeilBrown <neilb@suse.com>
Fri, 10 Mar 2017 06:00:47 +0000 (17:00 +1100)
committerJens Axboe <axboe@fb.com>
Sat, 11 Mar 2017 22:31:37 +0000 (15:31 -0700)
commitf5fe1b51905df7cfe4fdfd85c5fb7bc5b71a094f
treefbc336ee9d7ca18f8bfd81a8b54e99efd0555241
parent84c37c168c0e49a412d7021cda3183a72adac0d0
blk: Ensure users for current->bio_list can see the full list.

Commit 79bd99596b73 ("blk: improve order of bio handling in generic_make_request()")
changed current->bio_list so that it did not contain *all* of the
queued bios, but only those submitted by the currently running
make_request_fn.

There are two places which walk the list and requeue selected bios,
and others that check if the list is empty.  These are no longer
correct.

So redefine current->bio_list to point to an array of two lists, which
contain all queued bios, and adjust various code to test or walk both
lists.

Signed-off-by: NeilBrown <neilb@suse.com>
Fixes: 79bd99596b73 ("blk: improve order of bio handling in generic_make_request()")
Signed-off-by: Jens Axboe <axboe@fb.com>
block/bio.c
block/blk-core.c
drivers/md/dm.c
drivers/md/raid10.c