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btrfs-progs: constify extent buffer reader 

Add const prefix for the following parameters:
- @eb of memcmp_extent_buffer()
- @eb of read_extent_buffer()

This backports kernel commit 1cbb1f454e53 ("btrfs: struct-funcs,
constify readers") to btrfs-progs.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2019-06-17 15:59:33 +08:00 committed by David Sterba
parent a1dce63749
commit 991ad9b004
2 changed files with 4 additions and 4 deletions
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4
extent_io.c
View File

@ -963,13 +963,13 @@ int clear_extent_buffer_dirty(struct extent_buffer *eb)
return 0;
}
int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
int memcmp_extent_buffer(const struct extent_buffer *eb, const void *ptrv,
unsigned long start, unsigned long len)
{
return memcmp(eb->data + start, ptrv, len);
}
void read_extent_buffer(struct extent_buffer *eb, void *dst,
void read_extent_buffer(const struct extent_buffer *eb, void *dst,
unsigned long start, unsigned long len)
{
memcpy(dst, eb->data + start, len);

4
extent_io.h
View File

@ -154,9 +154,9 @@ void free_extent_buffer_nocache(struct extent_buffer *eb);
int read_extent_from_disk(struct extent_buffer *eb,
unsigned long offset, unsigned long len);
int write_extent_to_disk(struct extent_buffer *eb);
int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
int memcmp_extent_buffer(const struct extent_buffer *eb, const void *ptrv,
unsigned long start, unsigned long len);
void read_extent_buffer(struct extent_buffer *eb, void *dst,
void read_extent_buffer(const struct extent_buffer *eb, void *dst,
unsigned long start, unsigned long len);
void write_extent_buffer(struct extent_buffer *eb, const void *src,
unsigned long start, unsigned long len);