From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Sun, 17 Mar 2013 21:46:42 +0000 Subject: [PATCH v2, part3 02/12] mm/ARM64: kill poison_init_mem() In-Reply-To: <1363453413-8139-3-git-send-email-jiang.liu@huawei.com> References: <1363453413-8139-1-git-send-email-jiang.liu@huawei.com> <1363453413-8139-3-git-send-email-jiang.liu@huawei.com> Message-ID: <20130317214642.GA20875@mudshark.cambridge.arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sat, Mar 16, 2013 at 05:03:23PM +0000, Jiang Liu wrote: > Use free_reserved_area() to 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); This change looks unrelated to $subject. We should probably just poison with 0 from the outset, when free_initmem_default is introduced. Will