Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs...
[~shefty/rdma-dev.git] / fs / btrfs / compression.c
index 9d8ba4d54a37c3f96e9585de46b8e99d701410bc..a11a32058b50a4993f072fd1baddc6e9dafb52a8 100644 (file)
@@ -506,10 +506,10 @@ static noinline int add_ra_bio_pages(struct inode *inode,
                 */
                set_page_extent_mapped(page);
                lock_extent(tree, last_offset, end, GFP_NOFS);
-               spin_lock(&em_tree->lock);
+               read_lock(&em_tree->lock);
                em = lookup_extent_mapping(em_tree, last_offset,
                                           PAGE_CACHE_SIZE);
-               spin_unlock(&em_tree->lock);
+               read_unlock(&em_tree->lock);
 
                if (!em || last_offset < em->start ||
                    (last_offset + PAGE_CACHE_SIZE > extent_map_end(em)) ||
@@ -593,11 +593,11 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
        em_tree = &BTRFS_I(inode)->extent_tree;
 
        /* we need the actual starting offset of this extent in the file */
-       spin_lock(&em_tree->lock);
+       read_lock(&em_tree->lock);
        em = lookup_extent_mapping(em_tree,
                                   page_offset(bio->bi_io_vec->bv_page),
                                   PAGE_CACHE_SIZE);
-       spin_unlock(&em_tree->lock);
+       read_unlock(&em_tree->lock);
 
        compressed_len = em->block_len;
        cb = kmalloc(compressed_bio_size(root, compressed_len), GFP_NOFS);