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iov_iter: constify {csum_and_,}copy_to_iter() 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-12-06 16:49:22 -05:00
parent 527e9316f8
commit 36f7a8a4cd
2 changed files with 7 additions and 7 deletions
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4
include/linux/uio.h
View File

@ -82,7 +82,7 @@ size_t copy_page_to_iter(struct page *page, size_t offset, size_t bytes,
struct iov_iter *i);
size_t copy_page_from_iter(struct page *page, size_t offset, size_t bytes,
struct iov_iter *i);
size_t copy_to_iter(void *addr, size_t bytes, struct iov_iter *i);
size_t copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i);
size_t copy_from_iter(void *addr, size_t bytes, struct iov_iter *i);
size_t copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i);
size_t iov_iter_zero(size_t bytes, struct iov_iter *);
@ -145,7 +145,7 @@ static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
{
i->count = count;
}
size_t csum_and_copy_to_iter(void *addr, size_t bytes, __wsum *csum, struct iov_iter *i);
size_t csum_and_copy_to_iter(const void *addr, size_t bytes, __wsum *csum, struct iov_iter *i);
size_t csum_and_copy_from_iter(void *addr, size_t bytes, __wsum *csum, struct iov_iter *i);
int import_iovec(int type, const struct iovec __user * uvector,

10
lib/iov_iter.c
View File

@ -369,7 +369,7 @@ static void memcpy_from_page(char *to, struct page *page, size_t offset, size_t
kunmap_atomic(from);
}
static void memcpy_to_page(struct page *page, size_t offset, char *from, size_t len)
static void memcpy_to_page(struct page *page, size_t offset, const char *from, size_t len)
{
char *to = kmap_atomic(page);
memcpy(to + offset, from, len);
@ -383,9 +383,9 @@ static void memzero_page(struct page *page, size_t offset, size_t len)
kunmap_atomic(addr);
}
size_t copy_to_iter(void *addr, size_t bytes, struct iov_iter *i)
size_t copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i)
{
char *from = addr;
const char *from = addr;
if (unlikely(bytes > i->count))
bytes = i->count;
@ -704,10 +704,10 @@ size_t csum_and_copy_from_iter(void *addr, size_t bytes, __wsum *csum,
}
EXPORT_SYMBOL(csum_and_copy_from_iter);
size_t csum_and_copy_to_iter(void *addr, size_t bytes, __wsum *csum,
size_t csum_and_copy_to_iter(const void *addr, size_t bytes, __wsum *csum,
struct iov_iter *i)
{
char *from = addr;
const char *from = addr;
__wsum sum, next;
size_t off = 0;
if (unlikely(bytes > i->count))