+ lib-test_hmm-use-kvfree-to-free-kvcalloc-allocations.patch added to mm-new branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: lib/test_hmm: use kvfree() to free kvcalloc() allocations
has been added to the -mm mm-new branch.  Its filename is
     lib-test_hmm-use-kvfree-to-free-kvcalloc-allocations.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-test_hmm-use-kvfree-to-free-kvcalloc-allocations.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next

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------------------------------------------------------
From: Hao Ge <hao.ge@linux.dev>
Subject: lib/test_hmm: use kvfree() to free kvcalloc() allocations
Date: Wed, 13 May 2026 16:25:25 +0800

Coccinelle scripts/coccinelle/api/kfree_mismatch.cocci reports
the following warnings:

  lib/test_hmm.c:1256:15-16: WARNING kvmalloc is used to allocate this memory at line 1191
  lib/test_hmm.c:1257:15-16: WARNING kvmalloc is used to allocate this memory at line 1196

Fix this by replacing kfree() with kvfree() to correctly handle the
vmalloc() fallback path of kvcalloc().

Link: https://lore.kernel.org/20260513082525.154036-1-hao.ge@linux.dev
Fixes: 775465fd26a3 ("lib/test_hmm: add zone device private THP test infrastructure")
Signed-off-by: Hao Ge <hao.ge@linux.dev>
Acked-by: Balbir Singh <balbirs@nvidia.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/test_hmm.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/lib/test_hmm.c~lib-test_hmm-use-kvfree-to-free-kvcalloc-allocations
+++ a/lib/test_hmm.c
@@ -1253,8 +1253,8 @@ out:
 	mmap_read_unlock(mm);
 	mmput(mm);
 free_mem:
-	kfree(src_pfns);
-	kfree(dst_pfns);
+	kvfree(src_pfns);
+	kvfree(dst_pfns);
 	return ret;
 }
 
_

Patches currently in -mm which might be from hao.ge@linux.dev are

mm-alloc_tag-replace-fixed-size-early-pfn-array-with-dynamic-linked-list.patch
proc-meminfo-expose-per-node-balloon-pages-in-node-meminfo.patch
lib-test_hmm-use-kvfree-to-free-kvcalloc-allocations.patch