[PATCHv4 8/8] iov_iter: remove iov_iter_is_aligned

Keith Busch
2025-08-27T14:13:27Z

From: Keith Busch <kbusch@kernel.org>

No more callers.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
include/linux/uio.h | 2 -
lib/iov_iter.c | 95 ---------------------------------------------
2 files changed, 97 deletions(-)

diff --git a/include/linux/uio.h b/include/linux/uio.h
index 2e86c653186c6..5b127043a1519 100644
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -286,8 +286,6 @@ size_t _copy_mc_to_iter(const void *addr, size_t bytes, struct iov_iter *i);
#endif

size_t iov_iter_zero(size_t bytes, struct iov_iter *);
-bool iov_iter_is_aligned(const struct iov_iter *i, unsigned addr_mask,
- unsigned len_mask);
unsigned long iov_iter_alignment(const struct iov_iter *i);
unsigned long iov_iter_gap_alignment(const struct iov_iter *i);
void iov_iter_init(struct iov_iter *i, unsigned int direction, const struct iovec *iov,
diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index f9193f952f499..2fe66a6b8789e 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -784,101 +784,6 @@ void iov_iter_discard(struct iov_iter *i, unsigned int direction, size_t count)
}
EXPORT_SYMBOL(iov_iter_discard);

-static bool iov_iter_aligned_iovec(const struct iov_iter *i, unsigned addr_mask,
- unsigned len_mask)
-{
- const struct iovec *iov = iter_iov(i);
- size_t size = i->count;
- size_t skip = i->iov_offset;
-
- do {
- size_t len = iov->iov_len - skip;
-
- if (len > size)
- len = size;
- if (len & len_mask)
- return false;
- if ((unsigned long)(iov->iov_base + skip) & addr_mask)
- return false;
-
- iov++;
- size -= len;
- skip = 0;
- } while (size);
-
- return true;
-}
-
-static bool iov_iter_aligned_bvec(const struct iov_iter *i, unsigned addr_mask,
- unsigned len_mask)
-{
- const struct bio_vec *bvec = i->bvec;
- unsigned skip = i->iov_offset;
- size_t size = i->count;
-
- do {
- size_t len = bvec->bv_len - skip;
-
- if (len > size)
- len = size;
- if (len & len_mask)
- return false;
- if ((unsigned long)(bvec->bv_offset + skip) & addr_mask)
- return false;
-
- bvec++;
- size -= len;
- skip = 0;
- } while (size);
-
- return true;
-}
-
-/**
- * iov_iter_is_aligned() - Check if the addresses and lengths of each segments
- * are aligned to the parameters.
- *
- * @i: &struct iov_iter to restore
- * @addr_mask: bit mask to check against the iov element's addresses
- * @len_mask: bit mask to check against the iov element's lengths
- *
- * Return: false if any addresses or lengths intersect with the provided masks
- */
-bool iov_iter_is_aligned(const struct iov_iter *i, unsigned addr_mask,
- unsigned len_mask)
-{
- if (likely(iter_is_ubuf(i))) {
- if (i->count & len_mask)
- return false;
- if ((unsigned long)(i->ubuf + i->iov_offset) & addr_mask)
- return false;
- return true;
- }
-
- if (likely(iter_is_iovec(i) || iov_iter_is_kvec(i)))
- return iov_iter_aligned_iovec(i, addr_mask, len_mask);
-
- if (iov_iter_is_bvec(i))
- return iov_iter_aligned_bvec(i, addr_mask, len_mask);
-
- /* With both xarray and folioq types, we're dealing with whole folios. */
- if (iov_iter_is_xarray(i)) {
- if (i->count & len_mask)
- return false;
- if ((i->xarray_start + i->iov_offset) & addr_mask)
- return false;
- }
- if (iov_iter_is_folioq(i)) {
- if (i->count & len_mask)
- return false;
- if (i->iov_offset & addr_mask)
- return false;
- }
-
- return true;
-}
-EXPORT_SYMBOL_GPL(iov_iter_is_aligned);
-
static unsigned long iov_iter_alignment_iovec(const struct iov_iter *i)
{
const struct iovec *iov = iter_iov(i);
--
2.47.3