btrfs: Remove redundant tree argument from extent_readpages

This function is called only from btrfs_readpage and is already passed
the mapping. Simplify its signature by moving the code obtaining
reference to the extent tree in the function. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

3 files changed, 7 insertions, 9 deletions

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index d1a4434152da..20bb056b7eca 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4126,9 +4126,8 @@ int extent_writepages(struct extent_io_tree *tree,
         return ret;
 }
 
-int extent_readpages(struct extent_io_tree *tree,
-                     struct address_space *mapping,
-                     struct list_head *pages, unsigned nr_pages)
+int extent_readpages(struct address_space *mapping, struct list_head *pages,
+                     unsigned nr_pages)
 {
         struct bio *bio = NULL;
         unsigned page_idx;
@@ -4136,6 +4135,7 @@ int extent_readpages(struct extent_io_tree *tree,
         struct page *pagepool[16];
         struct page *page;
         struct extent_map *em_cached = NULL;
+        struct extent_io_tree *tree = &BTRFS_I(mapping->host)->io_tree;
         int nr = 0;
         u64 prev_em_start = (u64)-1;
 
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 29d47383b113..752ad87e40d5 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -416,9 +416,8 @@ int extent_writepages(struct extent_io_tree *tree,
                       struct writeback_control *wbc);
 int btree_write_cache_pages(struct address_space *mapping,
                             struct writeback_control *wbc);
-int extent_readpages(struct extent_io_tree *tree,
-                     struct address_space *mapping,
-                     struct list_head *pages, unsigned nr_pages);
+int extent_readpages(struct address_space *mapping, struct list_head *pages,
+                     unsigned nr_pages);
 int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
                 __u64 start, __u64 len);
 void set_page_extent_mapped(struct page *page);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 6853cd836a41..53ba8e8f1148 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8907,10 +8907,9 @@ static int
 btrfs_readpages(struct file *file, struct address_space *mapping,
                 struct list_head *pages, unsigned nr_pages)
 {
-        struct extent_io_tree *tree;
-        tree = &BTRFS_I(mapping->host)->io_tree;
-        return extent_readpages(tree, mapping, pages, nr_pages);
+        return extent_readpages(mapping, pages, nr_pages);
 }
+
 static int __btrfs_releasepage(struct page *page, gfp_t gfp_flags)
 {
         int ret = try_release_extent_mapping(page, gfp_flags);