The empty_zero_page sits at .bss..page_aligned section, so will be
cleared to zero during clearing bss, we don't need to clear it again.
Signed-off-by: Jisheng Zhang <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
---
Hi Palmer,
This patch was one of v3 series of "riscv: improve self-protection"
and acked by Anup. I checked Linus tree this tonight, it seems the v2 or
v1 was merged, this patch is missing, so I rebased and sent out this patch.
If it's late for linux-5.13, then I can rebase again once linux-5.13-rc1
is released.
Thanks in advance
arch/riscv/mm/init.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index dfb5e4f7a670..4a68b029e3d2 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -67,11 +67,6 @@ static void __init zone_sizes_init(void)
free_area_init(max_zone_pfns);
}
-static void __init setup_zero_page(void)
-{
- memset((void *)empty_zero_page, 0, PAGE_SIZE);
-}
-
#if defined(CONFIG_MMU) && defined(CONFIG_DEBUG_VM)
static inline void print_mlk(char *name, unsigned long b, unsigned long t)
{
@@ -862,7 +857,6 @@ RESERVEDMEM_OF_DECLARE(elfcorehdr, "linux,elfcorehdr", elfcore_hdr_setup);
void __init paging_init(void)
{
setup_vm_final();
- setup_zero_page();
}
void __init misc_mem_init(void)
--
2.31.0
On Fri, 07 May 2021 07:19:59 PDT (-0700), [email protected] wrote:
> The empty_zero_page sits at .bss..page_aligned section, so will be
> cleared to zero during clearing bss, we don't need to clear it again.
>
> Signed-off-by: Jisheng Zhang <[email protected]>
> Reviewed-by: Anup Patel <[email protected]>
> ---
>
> Hi Palmer,
>
> This patch was one of v3 series of "riscv: improve self-protection"
> and acked by Anup. I checked Linus tree this tonight, it seems the v2 or
> v1 was merged, this patch is missing, so I rebased and sent out this patch.
> If it's late for linux-5.13, then I can rebase again once linux-5.13-rc1
> is released.
>
> Thanks in advance
>
> arch/riscv/mm/init.c | 6 ------
> 1 file changed, 6 deletions(-)
>
> diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
> index dfb5e4f7a670..4a68b029e3d2 100644
> --- a/arch/riscv/mm/init.c
> +++ b/arch/riscv/mm/init.c
> @@ -67,11 +67,6 @@ static void __init zone_sizes_init(void)
> free_area_init(max_zone_pfns);
> }
>
> -static void __init setup_zero_page(void)
> -{
> - memset((void *)empty_zero_page, 0, PAGE_SIZE);
> -}
> -
> #if defined(CONFIG_MMU) && defined(CONFIG_DEBUG_VM)
> static inline void print_mlk(char *name, unsigned long b, unsigned long t)
> {
> @@ -862,7 +857,6 @@ RESERVEDMEM_OF_DECLARE(elfcorehdr, "linux,elfcorehdr", elfcore_hdr_setup);
> void __init paging_init(void)
> {
> setup_vm_final();
> - setup_zero_page();
> }
>
> void __init misc_mem_init(void)
Sorry, I missed this one. It's on for-next now.