btrfs: rename err to ret in prepare_pages()

Unify naming of return value to the preferred way.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index f55ac15d727a37208367b5852a56eda93aaa8234..c22264c9cc4504e585a6b2fcbcf4ea1216d8bfd8 100644 (file)
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -915,7 +915,7 @@ static noinline int prepare_pages(struct inode *inode, struct page **pages,
        unsigned long index = pos >> PAGE_SHIFT;
        gfp_t mask = get_prepare_gfp_flags(inode, nowait);
        fgf_t fgp_flags = get_prepare_fgp_flags(nowait);
-       int err = 0;
+       int ret = 0;
        int faili;
 
        for (i = 0; i < num_pages; i++) {
@@ -925,28 +925,28 @@ again:
                if (!pages[i]) {
                        faili = i - 1;
                        if (nowait)
-                               err = -EAGAIN;
+                               ret = -EAGAIN;
                        else
-                               err = -ENOMEM;
+                               ret = -ENOMEM;
                        goto fail;
                }
 
-               err = set_page_extent_mapped(pages[i]);
-               if (err < 0) {
+               ret = set_page_extent_mapped(pages[i]);
+               if (ret < 0) {
                        faili = i;
                        goto fail;
                }
 
                if (i == 0)
-                       err = prepare_uptodate_page(inode, pages[i], pos,
+                       ret = prepare_uptodate_page(inode, pages[i], pos,
                                                    force_uptodate);
-               if (!err && i == num_pages - 1)
-                       err = prepare_uptodate_page(inode, pages[i],
+               if (!ret && i == num_pages - 1)
+                       ret = prepare_uptodate_page(inode, pages[i],
                                                    pos + write_bytes, false);
-               if (err) {
+               if (ret) {
                        put_page(pages[i]);
-                       if (!nowait && err == -EAGAIN) {
-                               err = 0;
+                       if (!nowait && ret == -EAGAIN) {
+                               ret = 0;
                                goto again;
                        }
                        faili = i - 1;
@@ -962,7 +962,7 @@ fail:
                put_page(pages[faili]);
                faili--;
        }
-       return err;
+       return ret;
 
 }