From: Jisheng Zhang <jszhang3@mail.ustc.edu.cn>
Date: Fri, 7 May 2021 14:19:59 +0000 (+0800)
Subject: riscv: mm: Remove setup_zero_page()
X-Git-Tag: v5.14-rc1~32^2~28
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8f3e136ff378a2b22dbc0ca2a6e58022e6df36d2;p=thirdparty%2Fkernel%2Flinux.git

riscv: mm: Remove setup_zero_page()

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>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 4faf8bd157eaa..11b61bea0c4d3 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)
 {
@@ -867,7 +862,6 @@ 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)