Commit 8041ac64 authored by Chunguang Xu's avatar Chunguang Xu Committed by Theodore Ts'o
Browse files

ext4: update ext4_data_block_valid related comments 



Since ext4_data_block_valid() has been renamed to ext4_inode_block_valid(),
the related comments need to be updated.

Signed-off-by: default avatarChunguang Xu <brookxu@tencent.com>
Reviewed-by: default avatarAndreas Dilger <adilger@dilger.ca>
Link: https://lore.kernel.org/r/1604764698-4269-5-git-send-email-brookxu@tencent.com


Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent ce3cca33

fs/ext4/block_validity.c

+3 −3
Original line number Diff line number Diff line
@@ -206,7 +206,7 @@ static void ext4_destroy_system_zone(struct rcu_head *rcu) 
 *

 * The update of system_blks pointer in this function is protected by

 * sb->s_umount semaphore. However we have to be careful as we can be

 * racing with ext4_data_block_valid() calls reading system_blks rbtree

 * racing with ext4_inode_block_valid() calls reading system_blks rbtree

 * protected only by RCU. That's why we first build the rbtree and then

 * swap it in place.

 */
@@ -258,7 +258,7 @@ int ext4_setup_system_zone(struct super_block *sb) 


	/*

	 * System blks rbtree complete, announce it once to prevent racing

	 * with ext4_data_block_valid() accessing the rbtree at the same

	 * with ext4_inode_block_valid() accessing the rbtree at the same

	 * time.

	 */

	rcu_assign_pointer(sbi->s_system_blks, system_blks);
@@ -278,7 +278,7 @@ err: 
 *

 * The update of system_blks pointer in this function is protected by

 * sb->s_umount semaphore. However we have to be careful as we can be

 * racing with ext4_data_block_valid() calls reading system_blks rbtree

 * racing with ext4_inode_block_valid() calls reading system_blks rbtree

 * protected only by RCU. So we first clear the system_blks pointer and

 * then free the rbtree only after RCU grace period expires.

 */

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