linux-kernel - [PATCH 04/10] RISC-V: move empty_zero_page definition to C and export it

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Message-Id: <20171130015521.1289-5-olof@lixom.net>
Date:   Wed, 29 Nov 2017 17:55:15 -0800
From:   Olof Johansson <olof@...om.net>
To:     Palmer Dabbelt <palmer@...ive.com>
Cc:     Albert Ou <albert@...ive.com>, patches@...ups.riscv.org,
        linux-kernel@...r.kernel.org, Olof Johansson <olof@...om.net>
Subject: [PATCH 04/10] 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@...om.net>
---
 arch/riscv/kernel/head.S  | 3 ---
 arch/riscv/kernel/setup.c | 3 +++
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S
index 76af908..78f670d 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 de7db11..4375375 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;
 
-- 
2.8.6