From: Olof Johansson <olof@lixom.net>
Date: Thu, 30 Nov 2017 01:55:15 +0000 (-0800)
Subject: RISC-V: move empty_zero_page definition to C and export it
X-Git-Tag: v4.15-rc2~6^2^2~4
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=83e7b8769a08987f47117f3a065de153c839a0a8;p=users%2Fjedix%2Flinux-maple.git

RISC-V: move empty_zero_page definition to C and export it

Needed by some modules (exported by other architectures).

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
---

diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S
index 76af908f87c1..78f670d70133 100644
--- a/arch/riscv/kernel/head.S
+++ b/arch/riscv/kernel/head.S
@@ -152,6 +152,3 @@ END(_start)
 __PAGE_ALIGNED_BSS
 	/* Empty zero page */
 	.balign PAGE_SIZE
-ENTRY(empty_zero_page)
-	.fill (empty_zero_page + PAGE_SIZE) - ., 1, 0x00
-END(empty_zero_page)
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index de7db114c315..4375375ad168 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -60,6 +60,9 @@ static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
 unsigned long va_pa_offset;
 unsigned long pfn_base;
 
+unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] __page_aligned_bss;
+EXPORT_SYMBOL(empty_zero_page);
+
 /* The lucky hart to first increment this variable will boot the other cores */
 atomic_t hart_lottery;