Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull iov_iter infrastructure updates from Al Viro:
 "A couple of iov_iter updates"

* 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  iov_iter: export import_single_range()
  iov_iter: constify {csum_and_,}copy_to_iter()

1 files changed, 6 insertions, 5 deletions

diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 75232ad..5fecddc 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -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))
@@ -849,3 +849,4 @@ int import_single_range(int rw, void __user *buf, size_t len,
 	iov_iter_init(i, rw, iov, 1, len);
 	return 0;
 }
+EXPORT_SYMBOL(import_single_range);