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Commit c7548af6 authored by Chris Mason's avatar Chris Mason
Browse files

Btrfs: convert smp_mb__{before,after}_clear_bit 



The new call is smp_mb__{before,after}_atomic.  The __ gives us extra
protection from the atomic rays.

Signed-off-by: default avatarChris Mason <clm@fb.com>
parent 6eda71d0

fs/btrfs/transaction.c

+2 −2
Original line number Diff line number Diff line
@@ -290,7 +290,7 @@ static int record_root_in_trans(struct btrfs_trans_handle *trans, 
		 * done before we pop in the zero below

		 */

		btrfs_init_reloc_root(trans, root);

		smp_mb__before_clear_bit();

		smp_mb__before_atomic();

		clear_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state);

	}

	return 0;
@@ -1060,7 +1060,7 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans, 


			/* see comments in should_cow_block() */

			clear_bit(BTRFS_ROOT_FORCE_COW, &root->state);

			smp_mb__after_clear_bit();

			smp_mb__after_atomic();



			if (root->commit_root != root->node) {

				list_add_tail(&root->dirty_list,