btrfs: sink argument tree to __extent_read_full_page

The tree pointer can be safely read from the inode, use it and drop the
redundant argument.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 7e22f7de733ffd211d2a31243cbbd1fd7cfccf04..9e37f9a57c3646eb341bcc93cf696d069885fea4 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3340,8 +3340,7 @@ static inline void contiguous_readpages(struct extent_io_tree *tree,
        }
 }
 
-static int __extent_read_full_page(struct extent_io_tree *tree,
-                                  struct page *page,
+static int __extent_read_full_page(struct page *page,
                                   get_extent_t *get_extent,
                                   struct bio **bio, int mirror_num,
                                   unsigned long *bio_flags,
@@ -3350,10 +3349,9 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
        struct btrfs_inode *inode = BTRFS_I(page->mapping->host);
        u64 start = page_offset(page);
        u64 end = start + PAGE_SIZE - 1;
+       struct extent_io_tree *tree = &inode->io_tree;
        int ret;
 
-       ASSERT(tree == &inode->io_tree);
-
        btrfs_lock_and_flush_ordered_range(inode, start, end, NULL);
 
        ret = __do_readpage(tree, page, get_extent, NULL, bio, mirror_num,
@@ -3366,10 +3364,9 @@ int extent_read_full_page(struct page *page, get_extent_t *get_extent,
 {
        struct bio *bio = NULL;
        unsigned long bio_flags = 0;
-       struct extent_io_tree *tree = &BTRFS_I(page->mapping->host)->io_tree;
        int ret;
 
-       ret = __extent_read_full_page(tree, page, get_extent, &bio, mirror_num,
+       ret = __extent_read_full_page(page, get_extent, &bio, mirror_num,
                                      &bio_flags, 0);
        if (bio)
                ret = submit_one_bio(bio, mirror_num, bio_flags);
@@ -5451,13 +5448,10 @@ int read_extent_buffer_pages(struct extent_buffer *eb, int wait, int mirror_num)
        unsigned long num_reads = 0;
        struct bio *bio = NULL;
        unsigned long bio_flags = 0;
-       struct extent_io_tree *tree = &BTRFS_I(eb->fs_info->btree_inode)->io_tree;
 
        if (test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags))
                return 0;
 
-       ASSERT(tree == &BTRFS_I(eb->pages[0]->mapping->host)->io_tree);
-
        num_pages = num_extent_pages(eb);
        for (i = 0; i < num_pages; i++) {
                page = eb->pages[i];
@@ -5501,7 +5495,7 @@ int read_extent_buffer_pages(struct extent_buffer *eb, int wait, int mirror_num)
                        }
 
                        ClearPageError(page);
-                       err = __extent_read_full_page(tree, page,
+                       err = __extent_read_full_page(page,
                                                      btree_get_extent, &bio,
                                                      mirror_num, &bio_flags,
                                                      REQ_META);