[PATCH v2 16/28] s390: introduce arch_zone_limits_init()
From: Mike Rapoport <rppt@kernel.org>
Date: 2026-01-02 07:04:14
Also in:
linux-alpha, linux-cxl, linux-m68k, linux-mips, linux-mm, linux-riscv, linux-s390, linux-sh, linux-um, linuxppc-dev, lkml, loongarch, sparclinux
Subsystem:
s390 architecture, the rest · Maintainers:
Heiko Carstens, Vasily Gorbik, Alexander Gordeev, Linus Torvalds
From: "Mike Rapoport (Microsoft)" <rppt@kernel.org> 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/s390/mm/init.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index e4953453d254..1c11ad84dddb 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c@@ -86,6 +86,12 @@ static void __init setup_zero_pages(void) zero_page_mask = ((PAGE_SIZE << order) - 1) & PAGE_MASK; } +void __init arch_zone_limits_init(unsigned long *max_zone_pfns) +{ + max_zone_pfns[ZONE_DMA] = virt_to_pfn(MAX_DMA_ADDRESS); + max_zone_pfns[ZONE_NORMAL] = max_low_pfn; +} + /* * paging_init() sets up the page tables */
@@ -97,8 +103,7 @@ void __init paging_init(void) sparse_init(); zone_dma_limit = DMA_BIT_MASK(31); memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); - max_zone_pfns[ZONE_DMA] = virt_to_pfn(MAX_DMA_ADDRESS); - max_zone_pfns[ZONE_NORMAL] = max_low_pfn; + arch_zone_limits_init(max_zone_pfns); free_area_init(max_zone_pfns); }
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2.51.0