[PATCH v3 16/29] riscv: introduce arch_zone_limits_init()

Mike Rapoport
2026-01-11T08:25:29Z

Move calculations of zone limits to a dedicated arch_zone_limits_init()
function.

Later MM core will use this function as an architecture specific callback
during nodes and zones initialization and thus there won't be a need to
call free_area_init() from every architecture.

Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
---
arch/riscv/mm/init.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index addb8a9305be..97e8661fbcff 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -79,15 +79,19 @@ uintptr_t _dtb_early_pa __initdata;

phys_addr_t dma32_phys_limit __initdata;

-static void __init zone_sizes_init(void)
+void __init arch_zone_limits_init(unsigned long *max_zone_pfns)
{
- unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, };
-
#ifdef CONFIG_ZONE_DMA32
max_zone_pfns[ZONE_DMA32] = PFN_DOWN(dma32_phys_limit);
#endif
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+}
+
+static void __init zone_sizes_init(void)
+{
+ unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, };

+ arch_zone_limits_init(max_zone_pfns);
free_area_init(max_zone_pfns);