From: Miaohe Lin <linmiaohe@huawei.com>
Date: Thu, 17 Feb 2022 14:53:27 +0000 (+0800)
Subject: memblock: use kfree() to release kmalloced memblock regions
X-Git-Tag: v5.17-rc6~5^2
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=c94afc46cae7ad41b2ad6a99368147879f4b0e56;p=users%2Fdwmw2%2Flinux.git

memblock: use kfree() to release kmalloced memblock regions

memblock.{reserved,memory}.regions may be allocated using kmalloc() in
memblock_double_array(). Use kfree() to release these kmalloced regions
indicated by memblock_{reserved,memory}_in_slab.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Fixes: 3010f876500f ("mm: discard memblock data later")
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---

diff --git a/mm/memblock.c b/mm/memblock.c
index 1018e50566f35..b12a364f2766f 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -366,14 +366,20 @@ void __init memblock_discard(void)
 		addr = __pa(memblock.reserved.regions);
 		size = PAGE_ALIGN(sizeof(struct memblock_region) *
 				  memblock.reserved.max);
-		memblock_free_late(addr, size);
+		if (memblock_reserved_in_slab)
+			kfree(memblock.reserved.regions);
+		else
+			memblock_free_late(addr, size);
 	}
 
 	if (memblock.memory.regions != memblock_memory_init_regions) {
 		addr = __pa(memblock.memory.regions);
 		size = PAGE_ALIGN(sizeof(struct memblock_region) *
 				  memblock.memory.max);
-		memblock_free_late(addr, size);
+		if (memblock_memory_in_slab)
+			kfree(memblock.memory.regions);
+		else
+			memblock_free_late(addr, size);
 	}
 
 	memblock_memory = NULL;