1 files changed, 21 insertions, 87 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 087eed85c250..a2eb3a3755db 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -29,6 +29,7 @@
 #include <linux/crc32c.h>
 #include <linux/slab.h>
 #include <linux/migrate.h>
+#include <linux/ratelimit.h>
 #include <asm/unaligned.h>
 #include "compat.h"
 #include "ctree.h"
@@ -138,7 +139,7 @@ static const char *btrfs_eb_name[BTRFS_MAX_LEVEL + 1] = {
  * that covers the entire device
  */
 static struct extent_map *btree_get_extent(struct inode *inode,
-                struct page *page, size_t page_offset, u64 start, u64 len,
+                struct page *page, size_t pg_offset, u64 start, u64 len,
                 int create)
 {
         struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
@@ -155,7 +156,7 @@ static struct extent_map *btree_get_extent(struct inode *inode,
         }
         read_unlock(&em_tree->lock);
 
-        em = alloc_extent_map(GFP_NOFS);
+        em = alloc_extent_map();
         if (!em) {
                 em = ERR_PTR(-ENOMEM);
                 goto out;
@@ -255,14 +256,12 @@ static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
                         memcpy(&found, result, csum_size);
 
                         read_extent_buffer(buf, &val, 0, csum_size);
-                        if (printk_ratelimit()) {
-                                printk(KERN_INFO "btrfs: %s checksum verify "
+                        printk_ratelimited(KERN_INFO "btrfs: %s checksum verify "
                                        "failed on %llu wanted %X found %X "
                                        "level %d\n",
                                        root->fs_info->sb->s_id,
                                        (unsigned long long)buf->start, val, found,
                                        btrfs_header_level(buf));
-                        }
                         if (result != (char *)&inline_result)
                                 kfree(result);
                         return 1;
@@ -297,13 +296,11 @@ static int verify_parent_transid(struct extent_io_tree *io_tree,
                 ret = 0;
                 goto out;
         }
-        if (printk_ratelimit()) {
-                printk("parent transid verify failed on %llu wanted %llu "
+        printk_ratelimited("parent transid verify failed on %llu wanted %llu "
                        "found %llu\n",
                        (unsigned long long)eb->start,
                        (unsigned long long)parent_transid,
                        (unsigned long long)btrfs_header_generation(eb));
-        }
         ret = 1;
         clear_extent_buffer_uptodate(io_tree, eb, &cached_state);
 out:
@@ -381,7 +378,7 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
         len = page->private >> 2;
         WARN_ON(len == 0);
 
-        eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS);
+        eb = alloc_extent_buffer(tree, start, len, page);
         if (eb == NULL) {
                 WARN_ON(1);
                 goto out;
@@ -526,7 +523,7 @@ static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
         len = page->private >> 2;
         WARN_ON(len == 0);
 
-        eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS);
+        eb = alloc_extent_buffer(tree, start, len, page);
         if (eb == NULL) {
                 ret = -EIO;
                 goto out;
@@ -534,12 +531,10 @@ static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
 
         found_start = btrfs_header_bytenr(eb);
         if (found_start != start) {
-                if (printk_ratelimit()) {
-                        printk(KERN_INFO "btrfs bad tree block start "
+                printk_ratelimited(KERN_INFO "btrfs bad tree block start "
                                "%llu %llu\n",
                                (unsigned long long)found_start,
                                (unsigned long long)eb->start);
-                }
                 ret = -EIO;
                 goto err;
         }
@@ -551,10 +546,8 @@ static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
                 goto err;
         }
         if (check_tree_block_fsid(root, eb)) {
-                if (printk_ratelimit()) {
-                        printk(KERN_INFO "btrfs bad fsid on block %llu\n",
+                printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n",
                                (unsigned long long)eb->start);
-                }
                 ret = -EIO;
                 goto err;
         }
@@ -651,12 +644,6 @@ unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info)
         return 256 * limit;
 }
 
-int btrfs_congested_async(struct btrfs_fs_info *info, int iodone)
-{
-        return atomic_read(&info->nr_async_bios) >
-                btrfs_async_submit_limit(info);
-}
-
 static void run_one_async_start(struct btrfs_work *work)
 {
         struct async_submit_bio *async;
@@ -964,7 +951,7 @@ struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
         struct inode *btree_inode = root->fs_info->btree_inode;
         struct extent_buffer *eb;
         eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree,
-                                bytenr, blocksize, GFP_NOFS);
+                                bytenr, blocksize);
         return eb;
 }
 
@@ -975,7 +962,7 @@ struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
         struct extent_buffer *eb;
 
         eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree,
-                                 bytenr, blocksize, NULL, GFP_NOFS);
+                                 bytenr, blocksize, NULL);
         return eb;
 }
 
@@ -1082,7 +1069,7 @@ static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
         root->log_transid = 0;
         root->last_log_commit = 0;
         extent_io_tree_init(&root->dirty_log_pages,
-                             fs_info->btree_inode->i_mapping, GFP_NOFS);
+                             fs_info->btree_inode->i_mapping);
 
         memset(&root->root_key, 0, sizeof(root->root_key));
         memset(&root->root_item, 0, sizeof(root->root_item));
@@ -1285,21 +1272,6 @@ out:
         return root;
 }
 
-struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
-                                        u64 root_objectid)
-{
-        struct btrfs_root *root;
-
-        if (root_objectid == BTRFS_ROOT_TREE_OBJECTID)
-                return fs_info->tree_root;
-        if (root_objectid == BTRFS_EXTENT_TREE_OBJECTID)
-                return fs_info->extent_root;
-
-        root = radix_tree_lookup(&fs_info->fs_roots_radix,
-                                 (unsigned long)root_objectid);
-        return root;
-}
-
 struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
                                               struct btrfs_key *location)
 {
@@ -1384,41 +1356,6 @@ fail:
         return ERR_PTR(ret);
 }
 
-struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
-                                      struct btrfs_key *location,
-                                      const char *name, int namelen)
-{
-        return btrfs_read_fs_root_no_name(fs_info, location);
-#if 0
-        struct btrfs_root *root;
-        int ret;
-
-        root = btrfs_read_fs_root_no_name(fs_info, location);
-        if (!root)
-                return NULL;
-
-        if (root->in_sysfs)
-                return root;
-
-        ret = btrfs_set_root_name(root, name, namelen);
-        if (ret) {
-                free_extent_buffer(root->node);
-                kfree(root);
-                return ERR_PTR(ret);
-        }
-
-        ret = btrfs_sysfs_add_root(root);
-        if (ret) {
-                free_extent_buffer(root->node);
-                kfree(root->name);
-                kfree(root);
-                return ERR_PTR(ret);
-        }
-        root->in_sysfs = 1;
-        return root;
-#endif
-}
-
 static int btrfs_congested_fn(void *congested_data, int bdi_bits)
 {
         struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data;
@@ -1626,7 +1563,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
         struct btrfs_root *csum_root = kzalloc(sizeof(struct btrfs_root),
                                                  GFP_NOFS);
         struct btrfs_root *tree_root = btrfs_sb(sb);
-        struct btrfs_fs_info *fs_info = tree_root->fs_info;
+        struct btrfs_fs_info *fs_info = NULL;
         struct btrfs_root *chunk_root = kzalloc(sizeof(struct btrfs_root),
                                                 GFP_NOFS);
         struct btrfs_root *dev_root = kzalloc(sizeof(struct btrfs_root),
@@ -1638,11 +1575,12 @@ struct btrfs_root *open_ctree(struct super_block *sb,
 
         struct btrfs_super_block *disk_super;
 
-        if (!extent_root || !tree_root || !fs_info ||
+        if (!extent_root || !tree_root || !tree_root->fs_info ||
             !chunk_root || !dev_root || !csum_root) {
                 err = -ENOMEM;
                 goto fail;
         }
+        fs_info = tree_root->fs_info;
 
         ret = init_srcu_struct(&fs_info->subvol_srcu);
         if (ret) {
@@ -1733,10 +1671,8 @@ struct btrfs_root *open_ctree(struct super_block *sb,
 
         RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node);
         extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree,
-                             fs_info->btree_inode->i_mapping,
-                             GFP_NOFS);
-        extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree,
-                             GFP_NOFS);
+                             fs_info->btree_inode->i_mapping);
+        extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree);
 
         BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops;
 
@@ -1750,9 +1686,9 @@ struct btrfs_root *open_ctree(struct super_block *sb,
         fs_info->block_group_cache_tree = RB_ROOT;
 
         extent_io_tree_init(&fs_info->freed_extents[0],
-                             fs_info->btree_inode->i_mapping, GFP_NOFS);
+                             fs_info->btree_inode->i_mapping);
         extent_io_tree_init(&fs_info->freed_extents[1],
-                             fs_info->btree_inode->i_mapping, GFP_NOFS);
+                             fs_info->btree_inode->i_mapping);
         fs_info->pinned_extents = &fs_info->freed_extents[0];
         fs_info->do_barriers = 1;
 
@@ -2194,11 +2130,9 @@ static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate)
         if (uptodate) {
                 set_buffer_uptodate(bh);
         } else {
-                if (printk_ratelimit()) {
-                        printk(KERN_WARNING "lost page write due to "
+                printk_ratelimited(KERN_WARNING "lost page write due to "
                                         "I/O error on %s\n",
                                        bdevname(bh->b_bdev, b));
-                }
                 /* note, we dont' set_buffer_write_io_error because we have
                  * our own ways of dealing with the IO errors
                  */
@@ -2756,7 +2690,7 @@ int btree_lock_page_hook(struct page *page)
                 goto out;
 
         len = page->private >> 2;
-        eb = find_extent_buffer(io_tree, bytenr, len, GFP_NOFS);
+        eb = find_extent_buffer(io_tree, bytenr, len);
         if (!eb)
                 goto out;