The patch titled
Subject: mm: kmemleak: alloc gray object for reserved region with direct map.
has been added to the -mm tree. Its filename is
mm-kmemleak-alloc-gray-object-for-reserved-region-with-direct-map.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-kmemleak-alloc-gray-object-for-reserved-region-with-direct-map.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-kmemleak-alloc-gray-object-for-reserved-region-with-direct-map.patch
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------------------------------------------------------
From: Calvin Zhang <calvinzhang.cool@xxxxxxxxx>
Subject: mm: kmemleak: alloc gray object for reserved region with direct map.
Reserved regions with direct mapping may contain references to other
regions. CMA region with fixed location is reserved without creating
kmemleak_object for it.
So add them as gray kmemleak objects.
Link: https://lkml.kernel.org/r/20211123090641.3654006-1-calvinzhang.cool@xxxxxxxxx
Signed-off-by: Calvin Zhang <calvinzhang.cool@xxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Frank Rowand <frowand.list@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/of/fdt.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/of/fdt.c~mm-kmemleak-alloc-gray-object-for-reserved-region-with-direct-map
+++ a/drivers/of/fdt.c
@@ -26,6 +26,7 @@
#include <linux/serial_core.h>
#include <linux/sysfs.h>
#include <linux/random.h>
+#include <linux/kmemleak.h>
#include <asm/setup.h> /* for COMMAND_LINE_SIZE */
#include <asm/page.h>
@@ -522,9 +523,12 @@ static int __init __reserved_mem_reserve
size = dt_mem_next_cell(dt_root_size_cells, &prop);
if (size &&
- early_init_dt_reserve_memory_arch(base, size, nomap) == 0)
+ early_init_dt_reserve_memory_arch(base, size, nomap) == 0) {
pr_debug("Reserved memory: reserved region for node '%s': base %pa, size %lu MiB\n",
uname, &base, (unsigned long)(size / SZ_1M));
+ if (!nomap)
+ kmemleak_alloc_phys(base, size, 0, 0);
+ }
else
pr_info("Reserved memory: failed to reserve memory for node '%s': base %pa, size %lu MiB\n",
uname, &base, (unsigned long)(size / SZ_1M));
_
Patches currently in -mm which might be from calvinzhang.cool@xxxxxxxxx are
mm-kmemleak-alloc-gray-object-for-reserved-region-with-direct-map.patch
