From: Jisheng Zhang <jszhang3@mail.ustc.edu.cn> To: Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu> Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] riscv: mm: Remove setup_zero_page() Date: Fri, 7 May 2021 22:19:59 +0800 [thread overview] Message-ID: <20210507221959.2db29936@xhacker> (raw) 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) -- 2.31.0
WARNING: multiple messages have this Message-ID (diff)
From: Jisheng Zhang <jszhang3@mail.ustc.edu.cn> To: Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu> Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] riscv: mm: Remove setup_zero_page() Date: Fri, 7 May 2021 22:19:59 +0800 [thread overview] Message-ID: <20210507221959.2db29936@xhacker> (raw) 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) -- 2.31.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
next reply other threads:[~2021-05-07 14:26 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-07 14:19 Jisheng Zhang [this message] 2021-05-07 14:19 ` [PATCH] riscv: mm: Remove setup_zero_page() Jisheng Zhang 2021-05-23 2:04 ` Palmer Dabbelt 2021-05-23 2:04 ` Palmer Dabbelt
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