btrfs: use struct_size to calculate size of raid hash table
The struct_size macro does the same calculation and is safe regarding overflows. Though we're not expecting them to happen, use the helper for clarity. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: David Sterba <dsterba@suse.com>
Showing
Please register or sign in to comment