btrfs: Remove redundant mirror_num arg

The following callpath is always invoked with mirror_num set to 0, so
let's remove it as an argument and directly pass 0 to __do_redpage. No
functional change.

extent_readpages
  __extent_readpages
    __do_contiguous_readpages
      __do_readpage

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@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 012d638..c6e82a3 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3094,7 +3094,7 @@ static inline void __do_contiguous_readpages(struct extent_io_tree *tree,
                                             u64 start, u64 end,
                                             get_extent_t *get_extent,
                                             struct extent_map **em_cached,
-                                            struct bio **bio, int mirror_num,
+                                            struct bio **bio,
                                             unsigned long *bio_flags,
                                             u64 *prev_em_start)
 {
@@ -3116,7 +3116,7 @@ static inline void __do_contiguous_readpages(struct extent_io_tree *tree,
 
        for (index = 0; index < nr_pages; index++) {
                __do_readpage(tree, pages[index], get_extent, em_cached, bio,
-                             mirror_num, bio_flags, 0, prev_em_start);
+                             0, bio_flags, 0, prev_em_start);
                put_page(pages[index]);
        }
 }
@@ -3125,8 +3125,7 @@ static void __extent_readpages(struct extent_io_tree *tree,
                               struct page *pages[],
                               int nr_pages, get_extent_t *get_extent,
                               struct extent_map **em_cached,
-                              struct bio **bio, int mirror_num,
-                              unsigned long *bio_flags,
+                              struct bio **bio, unsigned long *bio_flags,
                               u64 *prev_em_start)
 {
        u64 start = 0;
@@ -3147,7 +3146,7 @@ static void __extent_readpages(struct extent_io_tree *tree,
                        __do_contiguous_readpages(tree, &pages[first_index],
                                                  index - first_index, start,
                                                  end, get_extent, em_cached,
-                                                 bio, mirror_num, bio_flags,
+                                                 bio, bio_flags,
                                                  prev_em_start);
                        start = page_start;
                        end = start + PAGE_SIZE - 1;
@@ -3159,8 +3158,7 @@ static void __extent_readpages(struct extent_io_tree *tree,
                __do_contiguous_readpages(tree, &pages[first_index],
                                          index - first_index, start,
                                          end, get_extent, em_cached, bio,
-                                         mirror_num, bio_flags,
-                                         prev_em_start);
+                                         bio_flags, prev_em_start);
 }
 
 static int __extent_read_full_page(struct extent_io_tree *tree,
@@ -4171,12 +4169,12 @@ int extent_readpages(struct extent_io_tree *tree,
                if (nr < ARRAY_SIZE(pagepool))
                        continue;
                __extent_readpages(tree, pagepool, nr, get_extent, &em_cached,
-                                  &bio, 0, &bio_flags, &prev_em_start);
+                                  &bio, &bio_flags, &prev_em_start);
                nr = 0;
        }
        if (nr)
                __extent_readpages(tree, pagepool, nr, get_extent, &em_cached,
-                                  &bio, 0, &bio_flags, &prev_em_start);
+                                  &bio, &bio_flags, &prev_em_start);
 
        if (em_cached)
                free_extent_map(em_cached);