block: avoid unnecessary plug list flush
authorShaohua Li <shaohua.li@intel.com>
Wed, 16 Nov 2011 08:21:50 +0000 (09:21 +0100)
committerJens Axboe <axboe@kernel.dk>
Wed, 16 Nov 2011 08:21:50 +0000 (09:21 +0100)
commit3540d5e89b2ac268fcfc9b07a50a9ba4acc2e5e5
tree10bb06165130e4ffe90bd990fbba497be8fb4e8a
parent0007a4c90a11a5371c8b3f80b220fa402a399189
block: avoid unnecessary plug list flush

get_request_wait() could sleep and flush the plug list.  If the list is
already flushed, don't flush again.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Reviewed-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/blk-core.c