The quilt patch titled
Subject: mm: percpu: use kmemleak_ignore_phys() instead of kmemleak_free()
has been removed from the -mm tree. Its filename was
mm-percpu-use-kmemleak_ignore_phys-instead-of-kmemleak_free.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: Patrick Wang <patrick.wang.shcn@xxxxxxxxx>
Subject: mm: percpu: use kmemleak_ignore_phys() instead of kmemleak_free()
Date: Tue, 5 Jul 2022 19:31:58 +0800
Kmemleak recently added a rbtree to store the objects allocted with
physical address. Those objects can't be freed with kmemleak_free().
According to the comments, percpu allocations are tracked by kmemleak
separately. Kmemleak_free() was used to avoid the unnecessary
tracking. If kmemleak_free() fails, those objects would be scanned by
kmemleak, which is unnecessary but shouldn't lead to other effects.
Use kmemleak_ignore_phys() instead of kmemleak_free() for those
objects.
Link: https://lkml.kernel.org/r/20220705113158.127600-1-patrick.wang.shcn@xxxxxxxxx
Fixes: 0c24e061196c ("mm: kmemleak: add rbtree and store physical address for objects allocated with PA")
Signed-off-by: Patrick Wang <patrick.wang.shcn@xxxxxxxxx>
Cc: Dennis Zhou <dennis@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/percpu.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/percpu.c~mm-percpu-use-kmemleak_ignore_phys-instead-of-kmemleak_free
+++ a/mm/percpu.c
@@ -3104,7 +3104,7 @@ int __init pcpu_embed_first_chunk(size_t
goto out_free_areas;
}
/* kmemleak tracks the percpu allocations separately */
- kmemleak_free(ptr);
+ kmemleak_ignore_phys(__pa(ptr));
areas[group] = ptr;
base = min(ptr, base);
@@ -3304,7 +3304,7 @@ int __init pcpu_page_first_chunk(size_t
goto enomem;
}
/* kmemleak tracks the percpu allocations separately */
- kmemleak_free(ptr);
+ kmemleak_ignore_phys(__pa(ptr));
pages[j++] = virt_to_page(ptr);
}
}
@@ -3417,7 +3417,7 @@ void __init setup_per_cpu_areas(void)
if (!ai || !fc)
panic("Failed to allocate memory for percpu areas.");
/* kmemleak tracks the percpu allocations separately */
- kmemleak_free(fc);
+ kmemleak_ignore_phys(__pa(fc));
ai->dyn_size = unit_size;
ai->unit_size = unit_size;
_
Patches currently in -mm which might be from patrick.wang.shcn@xxxxxxxxx are
