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btrfs: Remove unnecessary casts in btrfs_read_root_item 

There is a messy cast here:
	min_t(int, len, (int)sizeof(*item)));

min_t() should normally cast to unsigned.  It's not possible for "len"
to be negative, but if it were then we definitely wouldn't want to pass
negatives to read_extent_buffer().  Also there is an extra cast.

This patch shouldn't affect runtime, it's just a clean up.

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
YueHaibing 2019-02-20 12:32:02 +00:00 committed by David Sterba
parent 253002f2e3
commit f65e25e343
1 changed files with 2 additions and 2 deletions
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4
fs/btrfs/root-tree.c
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@ -21,12 +21,12 @@ static void btrfs_read_root_item(struct extent_buffer *eb, int slot,
struct btrfs_root_item *item) struct btrfs_root_item *item)
{ {
uuid_le uuid; uuid_le uuid;
int len; u32 len;
int need_reset = 0; int need_reset = 0;
len = btrfs_item_size_nr(eb, slot); len = btrfs_item_size_nr(eb, slot);
read_extent_buffer(eb, item, btrfs_item_ptr_offset(eb, slot), read_extent_buffer(eb, item, btrfs_item_ptr_offset(eb, slot),
min_t(int, len, (int)sizeof(*item))); min_t(u32, len, sizeof(*item)));
if (len < sizeof(*item)) if (len < sizeof(*item))
need_reset = 1; need_reset = 1;
if (!need_reset && btrfs_root_generation(item) if (!need_reset && btrfs_root_generation(item)