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>

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index d1a4434..20bb056 100644 (file)
--- 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 29d4738..752ad87 100644 (file)
--- 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 6853cd8..53ba8e8 100644 (file)
--- 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);