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 76af908..78f670d 100644 (file)
--- 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 (file)
--- 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;