btrfs: drop checks for mandatory extent_io_ops callbacks

We know that eadpage_end_io_hook, submit_bio_hook and merge_bio_hook are
always defined so we can drop the checks before we call them.

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

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 94beb75..0786985 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2567,8 +2567,7 @@ static void end_bio_extent_readpage(struct bio *bio)
                len = bvec->bv_len;
 
                mirror = io_bio->mirror_num;
-               if (likely(uptodate && tree->ops &&
-                          tree->ops->readpage_end_io_hook)) {
+               if (likely(uptodate && tree->ops)) {
                        ret = tree->ops->readpage_end_io_hook(io_bio, offset,
                                                              page, start, end,
                                                              mirror);
@@ -2731,7 +2730,7 @@ static int __must_check submit_one_bio(struct bio *bio, int mirror_num,
        bio->bi_private = NULL;
        bio_get(bio);
 
-       if (tree->ops && tree->ops->submit_bio_hook)
+       if (tree->ops)
                ret = tree->ops->submit_bio_hook(page->mapping->host, bio,
                                           mirror_num, bio_flags, start);
        else
@@ -2746,7 +2745,7 @@ static int merge_bio(struct extent_io_tree *tree, struct page *page,
                     unsigned long bio_flags)
 {
        int ret = 0;
-       if (tree->ops && tree->ops->merge_bio_hook)
+       if (tree->ops)
                ret = tree->ops->merge_bio_hook(page, offset, size, bio,
                                                bio_flags);
        return ret;