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authorMike Snitzer <snitzer@redhat.com>2010-11-08 08:39:12 -0500
committerJens Axboe <jaxboe@fusionio.com>2010-11-10 08:40:53 -0500
commit77304d2abac6101f7249754ffdd4421258877ab0 (patch)
tree8ee5914529d70120528a630a8e904c22f8c4f98c /drivers/block/drbd
parent90fdb0b98a62d78a0650b9fd3ddc58a48f71d740 (diff)
block: read i_size with i_size_read()
Convert direct reads of an inode's i_size to using i_size_read(). i_size_{read,write} use a seqcount to protect reads from accessing incomple writes. Concurrent i_size_write()s require mutual exclussion to protect the seqcount that is used by i_size_{read,write}. But i_size_read() callers do not need to use additional locking. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Acked-by: NeilBrown <neilb@suse.de> Acked-by: Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/block/drbd')
-rw-r--r--drivers/block/drbd/drbd_int.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 9bdcf4393c0a..2637f499f77f 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -1874,7 +1874,7 @@ static inline sector_t drbd_md_last_sector(struct drbd_backing_dev *bdev)
1874static inline sector_t drbd_get_capacity(struct block_device *bdev) 1874static inline sector_t drbd_get_capacity(struct block_device *bdev)
1875{ 1875{
1876 /* return bdev ? get_capacity(bdev->bd_disk) : 0; */ 1876 /* return bdev ? get_capacity(bdev->bd_disk) : 0; */
1877 return bdev ? bdev->bd_inode->i_size >> 9 : 0; 1877 return bdev ? i_size_read(bdev->bd_inode) >> 9 : 0;
1878} 1878}
1879 1879
1880/** 1880/**