Message ID | 20210507221959.2db29936@xhacker (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | riscv: mm: Remove setup_zero_page() | expand |
On Fri, 07 May 2021 07:19:59 PDT (-0700), jszhang3@mail.ustc.edu.cn 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 <jszhang@kernel.org> > Reviewed-by: Anup Patel <anup@brainfault.org> > --- > > 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.
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)