[RFC/RFT PATCH v2 3/5] riscv: Separate memory init from paging init

Atish Patra
2020-09-12T01:36:38Z

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>
---
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 eaea1f717010..515b42f98d34 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -466,6 +466,7 @@ static inline void __kernel_map_pages(struct page *page, int numpages, int enabl
extern void *dtb_early_va;
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 2c6dd329312b..07fa6d13367e 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -78,6 +78,7 @@ void __init setup_arch(char **cmdline_p)
#else
unflatten_device_tree();
#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 188281fc2816..8f31a5428ce4 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -568,8 +568,12 @@ 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();
}
--
2.24.0