[merged mm-stable] accel-amdxdna-use-hmm_range_fault_unlocked_timeout-for-range-population.patch removed from -mm tree

The quilt patch titled
     Subject: accel/amdxdna: use hmm_range_fault_unlocked_timeout() for range population
has been removed from the -mm tree.  Its filename was
     accel-amdxdna-use-hmm_range_fault_unlocked_timeout-for-range-population.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: Stanislav Kinsburskii <[email protected]>
Subject: accel/amdxdna: use hmm_range_fault_unlocked_timeout() for range population
Date: Thu, 23 Jul 2026 10:36:39 -0700

aie2_populate_range() takes mmap_read_lock() only around
hmm_range_fault().  It also open-codes the mmu interval sequence setup
before each HMM walk and retries -EBUSY until HMM_RANGE_DEFAULT_TIMEOUT
expires.

Use hmm_range_fault_unlocked_timeout() instead.  The HMM helper now owns
the mmap lock and refreshes mapp->range.notifier_seq for its internal
retries, so the driver only needs to call the helper and then validate the
sequence before marking the mapping populated.

Pass HMM_RANGE_DEFAULT_TIMEOUT as the helper retry budget for each HMM
population attempt.  This scopes the timeout to repeated HMM notifier
retries while preserving the existing outer loop that moves between
invalid mappings and restarts when the interval is invalidated before the
driver updates its mapping state.

Keep returning -ETIME when the HMM retry budget expires, matching the
driver's existing timeout error convention.

Link: https://lore.kernel.org/[email protected]
Signed-off-by: Stanislav Kinsburskii <[email protected]>
Reviewed-by: Jason Gunthorpe <[email protected]>
Cc: Danilo Krummrich <[email protected]>
Cc: Dave Airlie <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Dexuan Cui <[email protected]>
Cc: Haiyang Zhang <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: K. Y. Srinivasan <[email protected]>
Cc: Leon Romanovsky <[email protected]>
Cc: Liam R. Howlett <[email protected]>
Cc: Lizhi Hou <[email protected]>
Cc: Long Li <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: Lyude <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Oded Gabbay <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Thomas Zimemrmann <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Wei Liu <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 drivers/accel/amdxdna/aie2_ctx.c |   23 ++++-------------------
 1 file changed, 4 insertions(+), 19 deletions(-)

--- a/drivers/accel/amdxdna/aie2_ctx.c~accel-amdxdna-use-hmm_range_fault_unlocked_timeout-for-range-population
+++ a/drivers/accel/amdxdna/aie2_ctx.c
@@ -1047,7 +1047,7 @@ static int aie2_populate_range(struct am
 	bool found;
 	int ret;
 
-	timeout = jiffies + msecs_to_jiffies(HMM_RANGE_DEFAULT_TIMEOUT);
+	timeout = msecs_to_jiffies(HMM_RANGE_DEFAULT_TIMEOUT);
 again:
 	found = false;
 	down_write(&xdna->notifier_lock);
@@ -1072,24 +1072,9 @@ again:
 		return -EFAULT;
 	}
 
-	mapp->range.notifier_seq = mmu_interval_read_begin(&mapp->notifier);
-	mmap_read_lock(mm);
-	ret = hmm_range_fault(&mapp->range);
-	mmap_read_unlock(mm);
-	if (ret) {
-		if (time_after(jiffies, timeout)) {
-			ret = -ETIME;
-			goto put_mm;
-		}
-
-		if (ret == -EBUSY) {
-			amdxdna_umap_put(mapp);
-			mmput(mm);
-			goto again;
-		}
-
+	ret = hmm_range_fault_unlocked_timeout(&mapp->range, timeout);
+	if (ret)
 		goto put_mm;
-	}
 
 	down_write(&xdna->notifier_lock);
 	if (mmu_interval_read_retry(&mapp->notifier, mapp->range.notifier_seq)) {
@@ -1107,7 +1092,7 @@ again:
 put_mm:
 	amdxdna_umap_put(mapp);
 	mmput(mm);
-	return ret;
+	return ret == -EBUSY ? -ETIME : ret;
 }
 
 int aie2_cmd_submit(struct amdxdna_hwctx *hwctx, struct amdxdna_sched_job *job, u64 *seq)
_

Patches currently in -mm which might be from [email protected] are