[PATCH v2 05/28] csky: introduce arch_zone_limits_init()

Mike Rapoport
2026-01-02T07:01:36Z

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>
Acked-by: Guo Ren <guoren@kernel.org>
---
arch/csky/kernel/setup.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/csky/kernel/setup.c b/arch/csky/kernel/setup.c
index e0d6ca86ea8c..8968815d93e6 100644
--- a/arch/csky/kernel/setup.c
+++ b/arch/csky/kernel/setup.c
@@ -51,6 +51,14 @@ static void __init setup_initrd(void)
}
#endif

+void __init arch_zone_limits_init(unsigned long *max_zone_pfns)
+{
+ max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+#ifdef CONFIG_HIGHMEM
+ max_zone_pfns[ZONE_HIGHMEM] = max_pfn;
+#endif
+}
+
static void __init csky_memblock_init(void)
{
unsigned long lowmem_size = PFN_DOWN(LOWMEM_LIMIT - PHYS_OFFSET_OFFSET);
@@ -83,12 +91,9 @@ static void __init csky_memblock_init(void)
setup_initrd();
#endif

- max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
-
mmu_init(min_low_pfn, max_low_pfn);

#ifdef CONFIG_HIGHMEM
- max_zone_pfn[ZONE_HIGHMEM] = max_pfn;

highstart_pfn = max_low_pfn;
highend_pfn = max_pfn;
@@ -97,6 +102,7 @@ static void __init csky_memblock_init(void)

dma_contiguous_reserve(0);

+ arch_zone_limits_init(max_zone_pfn);
free_area_init(max_zone_pfn);
}

--
2.51.0