[PATCH v5 3/5] riscv: Separate memory init from paging init

[Atish Patra <atish.patra@wdc.com>]

Currently, we perform some memory init functions in paging init. But,
that will be an issue for NUMA support where DT needs to be flattened
before numa initialization and memblock_present can only be called
after numa initialization.

Move memory initialization related functions to a separate function.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Greentime Hu <greentime.hu@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/include/asm/pgtable.h | 1 +
 arch/riscv/kernel/setup.c        | 1 +
 arch/riscv/mm/init.c             | 6 +++++-
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 183f1f4b2ae6..a0f8a86236e8 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -471,6 +471,7 @@ extern void *dtb_early_va;
 extern uintptr_t dtb_early_pa;
 void setup_bootmem(void);
 void paging_init(void);
+void misc_mem_init(void);
 
 #define FIRST_USER_ADDRESS  0
 
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index c424cc6dd833..eb1cbdc29ea7 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -88,6 +88,7 @@ void __init setup_arch(char **cmdline_p)
 	else
 		pr_err("No DTB found in kernel mappings\n");
 #endif
+	misc_mem_init();
 
 #ifdef CONFIG_SWIOTLB
 	swiotlb_init(1);
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 8e577f14f120..826e7de73f45 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -664,8 +664,12 @@ static void __init resource_init(void)
 void __init paging_init(void)
 {
 	setup_vm_final();
-	sparse_init();
 	setup_zero_page();
+}
+
+void __init misc_mem_init(void)
+{
+	sparse_init();
 	zone_sizes_init();
 	resource_init();
 }
-- 
2.25.1