Use free_reserved_area() to poison initmem memory pages and kill
poison_init_mem() on ARM64.
Signed-off-by: Jiang Liu <jiang....@huawei.com>
Cc: Catalin Marinas <catalin.mari...@arm.com>
Cc: Will Deacon <will.dea...@arm.com>
Cc: linux-arm-ker...@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
arch/arm64/mm/init.c | 17 +++--------------
1 file changed, 3 insertions(+), 14 deletions(-)
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index e58dd7f..b87bdb8 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -197,14 +197,6 @@ void __init bootmem_init(void)
max_pfn = max_low_pfn = max;
}
-/*
- * Poison init memory with an undefined instruction (0x0).
- */
-static inline void poison_init_mem(void *s, size_t count)
-{
- memset(s, 0, count);
-}
-
#ifndef CONFIG_SPARSEMEM_VMEMMAP
static inline void free_memmap(unsigned long start_pfn, unsigned long end_pfn)
{
@@ -386,8 +378,7 @@ void __init mem_init(void)
void free_initmem(void)
{
- poison_init_mem(__init_begin, __init_end - __init_begin);
- free_initmem_default(-1);
+ free_initmem_default(0);
}
#ifdef CONFIG_BLK_DEV_INITRD
@@ -396,10 +387,8 @@ static int keep_initrd;
void free_initrd_mem(unsigned long start, unsigned long end)
{
- if (!keep_initrd) {
- poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
- free_reserved_area(start, end, -1, "initrd");
- }
+ if (!keep_initrd)
+ free_reserved_area(start, end, 0, "initrd");
}
static int __init keepinitrd_setup(char *__unused)
--
1.7.9.5
--
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