Btrfs: compress_file_range remove dead variable num_bytes

Remove dead assigment of num_bytes.

Also as num_bytes only used in the will_compress block as copy of
total_in just replace that with total_in and drop num_bytes entirely.

Signed-off-by: Timofey Titovets <nefelim4ag@gmail.com>
Reviewed-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/inode.c b/fs/btrfs/inode.c
index 2c08e09..aaf36f7 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -458,7 +458,6 @@ static noinline void compress_file_range(struct inode *inode,
 {
        struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
        struct btrfs_root *root = BTRFS_I(inode)->root;
-       u64 num_bytes;
        u64 blocksize = fs_info->sectorsize;
        u64 actual_end;
        u64 isize = i_size_read(inode);
@@ -508,8 +507,6 @@ again:
 
        total_compressed = min_t(unsigned long, total_compressed,
                        BTRFS_MAX_UNCOMPRESSED);
-       num_bytes = ALIGN(end - start + 1, blocksize);
-       num_bytes = max(blocksize,  num_bytes);
        total_in = 0;
        ret = 0;
 
@@ -625,7 +622,6 @@ cont:
                 */
                total_in = ALIGN(total_in, PAGE_SIZE);
                if (total_compressed + blocksize <= total_in) {
-                       num_bytes = total_in;
                        *num_added += 1;
 
                        /*
@@ -633,12 +629,12 @@ cont:
                         * allocation on disk for these compressed pages, and
                         * will submit them to the elevator.
                         */
-                       add_async_extent(async_cow, start, num_bytes,
+                       add_async_extent(async_cow, start, total_in,
                                        total_compressed, pages, nr_pages,
                                        compress_type);
 
-                       if (start + num_bytes < end) {
-                               start += num_bytes;
+                       if (start + total_in < end) {
+                               start += total_in;
                                pages = NULL;
                                cond_resched();
                                goto again;