Commit 4c2bf276 authored by David Sterba's avatar David Sterba
Browse files

btrfs: compression: drop kmap/kunmap from generic helpers 



The pages in compressed_pages are not from highmem anymore so we can
drop the mapping for checksum calculation and inline extent.

Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent bbaf9715

fs/btrfs/compression.c

+1 −2
Original line number Diff line number Diff line
@@ -172,10 +172,9 @@ static int check_compressed_csum(struct btrfs_inode *inode, struct bio *bio, 
		/* Hash through the page sector by sector */

		for (pg_offset = 0; pg_offset < bytes_left;

		     pg_offset += sectorsize) {

			kaddr = kmap_atomic(page);

			kaddr = page_address(page);

			crypto_shash_digest(shash, kaddr + pg_offset,

					    sectorsize, csum);

			kunmap_atomic(kaddr);



			if (memcmp(&csum, cb_sum, csum_size) != 0) {

				btrfs_print_data_csum_error(inode, disk_start,

fs/btrfs/inode.c

+1 −2
Original line number Diff line number Diff line
@@ -286,9 +286,8 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans, 
			cur_size = min_t(unsigned long, compressed_size,

				       PAGE_SIZE);



			kaddr = kmap_atomic(cpage);

			kaddr = page_address(cpage);

			write_extent_buffer(leaf, kaddr, ptr, cur_size);

			kunmap_atomic(kaddr);



			i++;

			ptr += cur_size;