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btrfs: don't initialize 'offset' in map_private_extent_buffer() 

In map_private_extent_buffer() the 'offset' variable is initialized to a
page aligned version of the 'start' parameter.

But later on it is overwritten with either the offset from the extent
buffer's start or 0.

So get rid of the initial initialization.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Johannes Thumshirn 2018-11-28 09:54:54 +01:00 committed by David Sterba
parent a5fb114291
commit cc2c39d605
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/extent_io.c
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@ -5380,7 +5380,7 @@ int map_private_extent_buffer(const struct extent_buffer *eb,
char **map, unsigned long *map_start,
unsigned long *map_len)
{
size_t offset = start & (PAGE_SIZE - 1);
size_t offset;
char *kaddr;
struct page *p;
size_t start_offset = eb->start & ((u64)PAGE_SIZE - 1);