trivial fix s/u64/u32/ for sb->s_blocksize

[Jeff Liu <jeff.liu@xxxxxxxxxx>]

Hello,

in btrfs_ioctl_clone(), using u32 for super_block->s_blocksize assignment.

Signed-off-by: Jie Liu <jeff.liu@xxxxxxxxxx>

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 970977a..03ab77a 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2133,12 +2133,12 @@ static noinline long btrfs_ioctl_clone(struct 
file *file, unsigned long srcfd,
     struct extent_buffer *leaf;
     char *buf;
     struct btrfs_key key;
-    u32 nritems;
     int slot;
     int ret;
     u64 len = olen;
-    u64 bs = root->fs_info->sb->s_blocksize;
     u64 hint_byte;
+    u32 bs = root->fs_info->sb->s_blocksize;
+    u32 nritems;

     /*
      * TODO:
--
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