btrfs: zstd: don't cache sectorsize in a local variable

The sectorsize is used once or at most twice in the callbacks, no need
to cache it on stack. Minor effect on zstd_compress_folios() where it
saves 8 bytes of stack.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2026-01-06 17:20:34 +01:00
commit f0d3b4c7b8