From mboxrd@z Thu Jan 1 00:00:00 1970 From: liuj97@gmail.com (Jiang Liu) Date: Sat, 6 Apr 2013 21:54:57 +0800 Subject: [PATCH v4, part3 03/15] mm/ARM64: kill poison_init_mem() In-Reply-To: <1365256509-29024-1-git-send-email-jiang.liu@huawei.com> References: <1365256509-29024-1-git-send-email-jiang.liu@huawei.com> Message-ID: <1365256509-29024-4-git-send-email-jiang.liu@huawei.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Use free_reserved_area() to poison initmem memory pages and kill poison_init_mem() on ARM64. Signed-off-by: Jiang Liu Cc: Catalin Marinas Cc: Will Deacon Cc: linux-arm-kernel at lists.infradead.org Cc: linux-kernel at 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