[PATCH 33/44] found_iovec_segment(): just return address

[Al Viro <viro@xxxxxxxxxxxxxxxxxx>]

... and calculate the offset in the caller

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
 lib/iov_iter.c | 22 +++++++---------------
 1 file changed, 7 insertions(+), 15 deletions(-)

diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index fca66ecce7a0..f455b8ee0d76 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -1306,33 +1306,23 @@ static ssize_t iter_xarray_get_pages(struct iov_iter *i,
 	return min_t(size_t, nr * PAGE_SIZE - offset, maxsize);
 }
 
-static unsigned long found_ubuf_segment(unsigned long addr, size_t *start)
-{
-	*start = addr % PAGE_SIZE;
-	return addr & PAGE_MASK;
-}
-
 /* must be done on non-empty ITER_UBUF or ITER_IOVEC one */
 static unsigned long first_iovec_segment(const struct iov_iter *i,
-					 size_t *size, size_t *start)
+					 size_t *size)
 {
 	size_t skip;
 	long k;
 
-	if (iter_is_ubuf(i)) {
-		unsigned long addr = (unsigned long)i->ubuf + i->iov_offset;
-		return found_ubuf_segment(addr, start);
-	}
+	if (iter_is_ubuf(i))
+		return (unsigned long)i->ubuf + i->iov_offset;
 
 	for (k = 0, skip = i->iov_offset; k < i->nr_segs; k++, skip = 0) {
-		unsigned long addr = (unsigned long)i->iov[k].iov_base + skip;
 		size_t len = i->iov[k].iov_len - skip;
-
 		if (unlikely(!len))
 			continue;
 		if (*size > len)
 			*size = len;
-		return found_ubuf_segment(addr, start);
+		return (unsigned long)i->iov[k].iov_base + skip;
 	}
 	BUG(); // if it had been empty, we wouldn't get called
 }
@@ -1375,7 +1365,9 @@ static ssize_t __iov_iter_get_pages_alloc(struct iov_iter *i,
 		if (i->nofault)
 			gup_flags |= FOLL_NOFAULT;
 
-		addr = first_iovec_segment(i, &maxsize, start);
+		addr = first_iovec_segment(i, &maxsize);
+		*start = addr % PAGE_SIZE;
+		addr &= PAGE_MASK;
 		n = DIV_ROUND_UP(maxsize + *start, PAGE_SIZE);
 		if (n > maxpages)
 			n = maxpages;
-- 
2.30.2