1 files changed, 20 insertions, 14 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 5313a13a998d..0577e77e661d 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -101,10 +101,9 @@ int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
         u64 total;
         u64 used;
         u64 thresh;
-        unsigned long flags;
         int ret = 0;
 
-        spin_lock_irqsave(&root->fs_info->delalloc_lock, flags);
+        spin_lock(&root->fs_info->delalloc_lock);
         total = btrfs_super_total_bytes(&root->fs_info->super_copy);
         used = btrfs_super_bytes_used(&root->fs_info->super_copy);
         if (for_del)
@@ -116,7 +115,7 @@ int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
 
         if (used + root->fs_info->delalloc_bytes + num_required > thresh)
                 ret = -ENOSPC;
-        spin_unlock_irqrestore(&root->fs_info->delalloc_lock, flags);
+        spin_unlock(&root->fs_info->delalloc_lock);
         return ret;
 }
 
@@ -1166,17 +1165,21 @@ static int run_delalloc_range(struct inode *inode, struct page *locked_page,
 static int btrfs_set_bit_hook(struct inode *inode, u64 start, u64 end,
                        unsigned long old, unsigned long bits)
 {
-        unsigned long flags;
+        /*
+         * set_bit and clear bit hooks normally require _irqsave/restore
+         * but in this case, we are only testeing for the DELALLOC
+         * bit, which is only set or cleared with irqs on
+         */
         if (!(old & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
                 struct btrfs_root *root = BTRFS_I(inode)->root;
-                spin_lock_irqsave(&root->fs_info->delalloc_lock, flags);
+                spin_lock(&root->fs_info->delalloc_lock);
                 BTRFS_I(inode)->delalloc_bytes += end - start + 1;
                 root->fs_info->delalloc_bytes += end - start + 1;
                 if (list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
                         list_add_tail(&BTRFS_I(inode)->delalloc_inodes,
                                       &root->fs_info->delalloc_inodes);
                 }
-                spin_unlock_irqrestore(&root->fs_info->delalloc_lock, flags);
+                spin_unlock(&root->fs_info->delalloc_lock);
         }
         return 0;
 }
@@ -1187,11 +1190,15 @@ static int btrfs_set_bit_hook(struct inode *inode, u64 start, u64 end,
 static int btrfs_clear_bit_hook(struct inode *inode, u64 start, u64 end,
                          unsigned long old, unsigned long bits)
 {
+        /*
+         * set_bit and clear bit hooks normally require _irqsave/restore
+         * but in this case, we are only testeing for the DELALLOC
+         * bit, which is only set or cleared with irqs on
+         */
         if ((old & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
                 struct btrfs_root *root = BTRFS_I(inode)->root;
-                unsigned long flags;
 
-                spin_lock_irqsave(&root->fs_info->delalloc_lock, flags);
+                spin_lock(&root->fs_info->delalloc_lock);
                 if (end - start + 1 > root->fs_info->delalloc_bytes) {
                         printk("warning: delalloc account %Lu %Lu\n",
                                end - start + 1, root->fs_info->delalloc_bytes);
@@ -1205,7 +1212,7 @@ static int btrfs_clear_bit_hook(struct inode *inode, u64 start, u64 end,
                     !list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
                         list_del_init(&BTRFS_I(inode)->delalloc_inodes);
                 }
-                spin_unlock_irqrestore(&root->fs_info->delalloc_lock, flags);
+                spin_unlock(&root->fs_info->delalloc_lock);
         }
         return 0;
 }
@@ -4651,27 +4658,26 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root)
         struct list_head *head = &root->fs_info->delalloc_inodes;
         struct btrfs_inode *binode;
         struct inode *inode;
-        unsigned long flags;
 
         if (root->fs_info->sb->s_flags & MS_RDONLY)
                 return -EROFS;
 
-        spin_lock_irqsave(&root->fs_info->delalloc_lock, flags);
+        spin_lock(&root->fs_info->delalloc_lock);
         while(!list_empty(head)) {
                 binode = list_entry(head->next, struct btrfs_inode,
                                     delalloc_inodes);
                 inode = igrab(&binode->vfs_inode);
                 if (!inode)
                         list_del_init(&binode->delalloc_inodes);
-                spin_unlock_irqrestore(&root->fs_info->delalloc_lock, flags);
+                spin_unlock(&root->fs_info->delalloc_lock);
                 if (inode) {
                         filemap_flush(inode->i_mapping);
                         iput(inode);
                 }
                 cond_resched();
-                spin_lock_irqsave(&root->fs_info->delalloc_lock, flags);
+                spin_lock(&root->fs_info->delalloc_lock);
         }
-        spin_unlock_irqrestore(&root->fs_info->delalloc_lock, flags);
+        spin_unlock(&root->fs_info->delalloc_lock);
 
         /* the filemap_flush will queue IO into the worker threads, but
          * we have to make sure the IO is actually started and that