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authorAl Viro <viro@zeniv.linux.org.uk>2022-06-17 23:07:49 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2022-07-07 03:32:34 +0300
commitdd45ab9dd28c82fc495d98cd9788666fd8d76b99 (patch)
treef251186a6b788fa01da450c22b21d3697ef7cbb9 /lib/iov_iter.c
parent59dbd7d0904a887ede1538b55bb8095ff2ce5078 (diff)
downloadlinux-dd45ab9dd28c82fc495d98cd9788666fd8d76b99.tar.xz
first_iovec_segment(): just return address
... and calculate the offset in the caller Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'lib/iov_iter.c')
-rw-r--r--lib/iov_iter.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index d93c6a1ffe26..a4a44065cd37 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -1293,22 +1293,19 @@ static ssize_t iter_xarray_get_pages(struct iov_iter *i,
}
/* must be done on non-empty ITER_IOVEC one */
-static unsigned long first_iovec_segment(const struct iov_iter *i,
- size_t *size, size_t *start)
+static unsigned long first_iovec_segment(const struct iov_iter *i, size_t *size)
{
size_t skip;
long k;
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;
- *start = addr % PAGE_SIZE;
- return addr & PAGE_MASK;
+ return (unsigned long)i->iov[k].iov_base + skip;
}
BUG(); // if it had been empty, we wouldn't get called
}
@@ -1351,7 +1348,9 @@ ssize_t iov_iter_get_pages(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;
@@ -1482,7 +1481,9 @@ 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);
p = get_pages_array(n);
if (!p)