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btrfs: constify buffers used by compression helpers

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Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2017-02-14 17:58:04 +01:00
parent 9ed573674a
commit 14a3357b40
3 changed files with 3 additions and 3 deletions
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2
fs/btrfs/compression.c
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@ -1015,7 +1015,7 @@ void btrfs_exit_compress(void)
*
* total_out is the last byte of the buffer
*/
int btrfs_decompress_buf2page(char *buf, unsigned long buf_start,
int btrfs_decompress_buf2page(const char *buf, unsigned long buf_start,
unsigned long total_out, u64 disk_start,
struct bio *bio)
{

2
fs/btrfs/compression.h
View File

@ -32,7 +32,7 @@ int btrfs_compress_pages(int type, struct address_space *mapping,
unsigned long max_out);
int btrfs_decompress(int type, unsigned char *data_in, struct page *dest_page,
unsigned long start_byte, size_t srclen, size_t destlen);
int btrfs_decompress_buf2page(char *buf, unsigned long buf_start,
int btrfs_decompress_buf2page(const char *buf, unsigned long buf_start,
unsigned long total_out, u64 disk_start,
struct bio *bio);

2
fs/btrfs/lzo.c
View File

@ -76,7 +76,7 @@ static inline void write_compress_length(char *buf, size_t len)
memcpy(buf, &dlen, LZO_LEN);
}
static inline size_t read_compress_length(char *buf)
static inline size_t read_compress_length(const char *buf)
{
__le32 dlen;