[merged mm-stable] mm-hmmc-hmm_do_fault-suppress-sparse-warning.patch removed from -mm tree

[merged mm-stable] mm-hmmc-hmm_do_fault-suppress-sparse-warning.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/hmm.c:hmm_do_fault(): suppress sparse warning
has been removed from the -mm tree.  Its filename was
     mm-hmmc-hmm_do_fault-suppress-sparse-warning.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: Andrew Morton <akpm@linux-foundation.org>
Subject: mm/hmm.c:hmm_do_fault(): suppress sparse warning
Date: Mon Aug 10 01:16:37 PM PDT 2026

mm/hmm.c:673 hmm_do_fault() error: we previously assumed 'hmm_vma_walk->locked' could be null (see line 654)

Stanislav says this can't happen.  Waste a few cycles to make the warning
go away.

[akpm@linux-foundation.org: WARN_ON_ONCE() if the handler didn't set ->locked, per Stanislav]
  Link: https://lore.kernel.org/anu1N-DOnQwxO1kF@skinsburskii
Fixes: 121170831228 ("mm/hmm: add hmm_range_fault_unlocked_timeout() for mmap lock-drop support")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/202608101053.PhnVUM4u-lkp@intel.com
Cc: Stanislav Kinsburskii <skinsburskii@gmail.com>
Cc: David Hildenbrand <david@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/hmm.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/mm/hmm.c~mm-hmmc-hmm_do_fault-suppress-sparse-warning
+++ a/mm/hmm.c
@@ -670,7 +670,10 @@ static int hmm_do_fault(struct mm_struct
 		ret = handle_mm_fault(vma, addr, fault_flags, NULL);
 
 		if (ret & (VM_FAULT_COMPLETED | VM_FAULT_RETRY)) {
-			*hmm_vma_walk->locked = false;
+			if (hmm_vma_walk->locked)    /* needed by sparse */
+				*hmm_vma_walk->locked = false;
+			else
+				WARN_ON_ONCE(1);    /* broken fault handler */
 			return HMM_FAULT_UNLOCKED;
 		}
 
_

Patches currently in -mm which might be from akpm@linux-foundation.org are

drivers-media-v4l2-core-v4l2-vp9c-reduce-inlining.patch