[PATCH] Rearrange of inode_lock in writeback_inodes()

[Kirill Korotaev <dev@sw.ru>]

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This patch reaaranges inode_lock taking in writeback_inodes().
It narrows down use of inode_lock and removes unneccassary nesting of 
sb_lock and inode_lock.
Instead of holding inode_lock for all the time I moved it around
sync_sb_inodes() as it is in all other places.

Signed-Off-By: Kirill Korotaev <dev@sw.ru>

Kirill

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--- ./fs/fs-writeback.c.sblock	2004-09-14 11:07:36.000000000 +0400
+++ ./fs/fs-writeback.c	2004-09-14 11:13:23.931085680 +0400
@@ -392,7 +392,6 @@ writeback_inodes(struct writeback_contro
 {
 	struct super_block *sb;
 
-	spin_lock(&inode_lock);
 	spin_lock(&sb_lock);
 restart:
 	sb = sb_entry(super_blocks.prev);
@@ -407,8 +406,11 @@ restart:
 			 * be unmounted by the time it is released.
 			 */
 			if (down_read_trylock(&sb->s_umount)) {
-				if (sb->s_root)
+				if (sb->s_root) {
+					spin_lock(&inode_lock);
 					sync_sb_inodes(sb, wbc);
+					spin_unlock(&inode_lock);
+				}
 				up_read(&sb->s_umount);
 			}
 			spin_lock(&sb_lock);
@@ -425,7 +427,6 @@ restart:
 			break;
 	}
 	spin_unlock(&sb_lock);
-	spin_unlock(&inode_lock);
 }
 
 /*