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* [merged mm-stable] block-update-comment-of-struct-bio_vec-regarding-nth_page.patch removed from -mm tree
@ 2025-09-21 21:24 Andrew Morton
  0 siblings, 0 replies; only message in thread
From: Andrew Morton @ 2025-09-21 21:24 UTC (permalink / raw)
  To: mm-commits, lorenzo.stoakes, david, akpm


The quilt patch titled
     Subject: block: update comment of "struct bio_vec" regarding nth_page()
has been removed from the -mm tree.  Its filename was
     block-update-comment-of-struct-bio_vec-regarding-nth_page.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: David Hildenbrand <david@redhat.com>
Subject: block: update comment of "struct bio_vec" regarding nth_page()
Date: Mon, 1 Sep 2025 17:03:57 +0200

Ever since commit 858c708d9efb ("block: move the bi_size update out of
__bio_try_merge_page"), page_is_mergeable() no longer exists, and the
logic in bvec_try_merge_page() is now a simple page pointer comparison.

Link: https://lkml.kernel.org/r/20250901150359.867252-37-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/bvec.h |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

--- a/include/linux/bvec.h~block-update-comment-of-struct-bio_vec-regarding-nth_page
+++ a/include/linux/bvec.h
@@ -22,11 +22,8 @@ struct page;
  * @bv_len:    Number of bytes in the address range.
  * @bv_offset: Start of the address range relative to the start of @bv_page.
  *
- * The following holds for a bvec if n * PAGE_SIZE < bv_offset + bv_len:
- *
- *   nth_page(@bv_page, n) == @bv_page + n
- *
- * This holds because page_is_mergeable() checks the above property.
+ * All pages within a bio_vec starting from @bv_page are contiguous and
+ * can simply be iterated (see bvec_advance()).
  */
 struct bio_vec {
 	struct page	*bv_page;
_

Patches currently in -mm which might be from david@redhat.com are



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2025-09-21 21:24 [merged mm-stable] block-update-comment-of-struct-bio_vec-regarding-nth_page.patch removed from -mm tree Andrew Morton

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