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btrfs: compression: drop kmap/kunmap from generic helpers

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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: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2021-06-15 17:15:38 +02:00
parent bbaf9715f3
commit 4c2bf276b5
2 changed files with 2 additions and 4 deletions
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3
fs/btrfs/compression.c
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@ -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,

3
fs/btrfs/inode.c
View File

@ -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;