btrfs: Remove isize local variable in compress_file_range

It's used only once so just inline the call to i_size_read. The
semantics regarding the inode size are not changed, the pages in the
range are locked and i_size cannot change between the time it was set
and used.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
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/inode.c b/fs/btrfs/inode.c
index 2603c47f5789ca6e6853df0515a6afcd822be56e..3c11982d73f701e01bff3d98ef5ad0b0094ca19b 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -453,7 +453,6 @@ static noinline void compress_file_range(struct inode *inode,
        struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
        u64 blocksize = fs_info->sectorsize;
        u64 actual_end;
-       u64 isize = i_size_read(inode);
        int ret = 0;
        struct page **pages = NULL;
        unsigned long nr_pages;
@@ -467,7 +466,7 @@ static noinline void compress_file_range(struct inode *inode,
        inode_should_defrag(BTRFS_I(inode), start, end, end - start + 1,
                        SZ_16K);
 
-       actual_end = min_t(u64, isize, end + 1);
+       actual_end = min_t(u64, i_size_read(inode), end + 1);
 again:
        will_compress = 0;
        nr_pages = (end >> PAGE_SHIFT) - (start >> PAGE_SHIFT) + 1;