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authorJens Axboe <jens.axboe@oracle.com>2009-09-14 15:12:40 +0400
committerJens Axboe <jens.axboe@oracle.com>2009-09-16 17:18:51 +0400
commitcfc4ba5365449cb6b5c9f68d755a142f17da1e47 (patch)
tree08770de9bb0e658f2e65abd4d10187b3e9f6bb1b /include/linux/backing-dev.h
parentf11fcae8401a3175f528e2f7917362645d570111 (diff)
downloadlinux-cfc4ba5365449cb6b5c9f68d755a142f17da1e47.tar.xz
writeback: use RCU to protect bdi_list
Now that bdi_writeback_all() no longer handles integrity writeback, it doesn't have to block anymore. This means that we can switch bdi_list reader side protection to RCU. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/backing-dev.h')
-rw-r--r--include/linux/backing-dev.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index f169bcb90b58..859e797f4576 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -59,6 +59,7 @@ struct bdi_writeback {
struct backing_dev_info {
struct list_head bdi_list;
+ struct rcu_head rcu_head;
unsigned long ra_pages; /* max readahead in PAGE_CACHE_SIZE units */
unsigned long state; /* Always use atomic bitops on this */
unsigned int capabilities; /* Device capabilities */