iov_iter: remove iov_iter_get_pages and iov_iter_get_pages_alloc

Now that the direct I/O helpers have switched to use
iov_iter_extract_pages, these helpers are unused.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Reviewed-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20230614140341.521331-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: Christoph Hellwig

include/linux/uio.h

@@ -277,14 +277,8 @@ void iov_iter_bvec(struct iov_iter *i, unsigned int direction, const struct bio_
 void iov_iter_discard(struct iov_iter *i, unsigned int direction, size_t count);
 void iov_iter_xarray(struct iov_iter *i, unsigned int direction, struct xarray *xarray,
 		     loff_t start, size_t count);
-ssize_t iov_iter_get_pages(struct iov_iter *i, struct page **pages,
-		size_t maxsize, unsigned maxpages, size_t *start,
-		iov_iter_extraction_t extraction_flags);
 ssize_t iov_iter_get_pages2(struct iov_iter *i, struct page **pages,
 			size_t maxsize, unsigned maxpages, size_t *start);
-ssize_t iov_iter_get_pages_alloc(struct iov_iter *i,
-		struct page ***pages, size_t maxsize, size_t *start,
-		iov_iter_extraction_t extraction_flags);
 ssize_t iov_iter_get_pages_alloc2(struct iov_iter *i, struct page ***pages,
 			size_t maxsize, size_t *start);
 int iov_iter_npages(const struct iov_iter *i, int maxpages);

lib/iov_iter.c

@@ -1082,8 +1082,7 @@ static struct page *first_bvec_segment(const struct iov_iter *i,
 
 static ssize_t __iov_iter_get_pages_alloc(struct iov_iter *i,
 		   struct page ***pages, size_t maxsize,
-		   unsigned int maxpages, size_t *start,
-		   iov_iter_extraction_t extraction_flags)
+		   unsigned int maxpages, size_t *start)
 {
 	unsigned int n, gup_flags = 0;
 
@@ -1093,8 +1092,6 @@ static ssize_t __iov_iter_get_pages_alloc(struct iov_iter *i,
 		return 0;
 	if (maxsize > MAX_RW_COUNT)
 		maxsize = MAX_RW_COUNT;
-	if (extraction_flags & ITER_ALLOW_P2PDMA)
-		gup_flags |= FOLL_PCI_P2PDMA;
 
 	if (likely(user_backed_iter(i))) {
 		unsigned long addr;
@@ -1144,49 +1141,31 @@ static ssize_t __iov_iter_get_pages_alloc(struct iov_iter *i,
 	return -EFAULT;
 }
 
-ssize_t iov_iter_get_pages(struct iov_iter *i,
-		   struct page **pages, size_t maxsize, unsigned maxpages,
-		   size_t *start, iov_iter_extraction_t extraction_flags)
+ssize_t iov_iter_get_pages2(struct iov_iter *i, struct page **pages,
+		size_t maxsize, unsigned maxpages, size_t *start)
 {
 	if (!maxpages)
 		return 0;
 	BUG_ON(!pages);
 
-	return __iov_iter_get_pages_alloc(i, &pages, maxsize, maxpages,
-					  start, extraction_flags);
-}
-EXPORT_SYMBOL_GPL(iov_iter_get_pages);
-
-ssize_t iov_iter_get_pages2(struct iov_iter *i, struct page **pages,
-		size_t maxsize, unsigned maxpages, size_t *start)
-{
-	return iov_iter_get_pages(i, pages, maxsize, maxpages, start, 0);
+	return __iov_iter_get_pages_alloc(i, &pages, maxsize, maxpages, start);
 }
 EXPORT_SYMBOL(iov_iter_get_pages2);
 
-ssize_t iov_iter_get_pages_alloc(struct iov_iter *i,
-		   struct page ***pages, size_t maxsize,
-		   size_t *start, iov_iter_extraction_t extraction_flags)
+ssize_t iov_iter_get_pages_alloc2(struct iov_iter *i,
+		struct page ***pages, size_t maxsize, size_t *start)
 {
 	ssize_t len;
 
 	*pages = NULL;
 
-	len = __iov_iter_get_pages_alloc(i, pages, maxsize, ~0U, start,
-					 extraction_flags);
+	len = __iov_iter_get_pages_alloc(i, pages, maxsize, ~0U, start);
 	if (len <= 0) {
 		kvfree(*pages);
 		*pages = NULL;
 	}
 	return len;
 }
-EXPORT_SYMBOL_GPL(iov_iter_get_pages_alloc);
-
-ssize_t iov_iter_get_pages_alloc2(struct iov_iter *i,
-		struct page ***pages, size_t maxsize, size_t *start)
-{
-	return iov_iter_get_pages_alloc(i, pages, maxsize, start, 0);
-}
 EXPORT_SYMBOL(iov_iter_get_pages_alloc2);
 
 size_t csum_and_copy_from_iter(void *addr, size_t bytes, __wsum *csum,