[PATCH 06/21] alpha: simplify detection of memory zone boundaries
From: Mike Rapoport <rppt@kernel.org>
Date: 2020-04-12 19:50:52
Also in:
linux-alpha, linux-arch, linux-mm, linux-riscv, linux-um
Subsystem:
alpha port, the rest · Maintainers:
Richard Henderson, Matt Turner, Magnus Lindholm, Linus Torvalds
From: Mike Rapoport <redacted> The free_area_init() function only requires the definition of maximal PFN for each of the supported zone rater than calculation of actual zone sizes and the sizes of the holes between the zones. After removal of CONFIG_HAVE_MEMBLOCK_NODE_MAP the free_area_init() is available to all architectures. Using this function instead of free_area_init_node() simplifies the zone detection. Signed-off-by: Mike Rapoport <redacted> --- arch/alpha/mm/numa.c | 18 ++++-------------- 1 file changed, 4 insertions(+), 14 deletions(-)
diff --git a/arch/alpha/mm/numa.c b/arch/alpha/mm/numa.c
index a24cd13e71cb..5ad6087de1d6 100644
--- a/arch/alpha/mm/numa.c
+++ b/arch/alpha/mm/numa.c@@ -202,8 +202,7 @@ setup_memory(void *kernel_end) void __init paging_init(void) { - unsigned int nid; - unsigned long zones_size[MAX_NR_ZONES] = {0, }; + unsigned long max_zone_pfn[MAX_NR_ZONES] = {0, }; unsigned long dma_local_pfn; /*
@@ -215,19 +214,10 @@ void __init paging_init(void) */ dma_local_pfn = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; - for_each_online_node(nid) { - unsigned long start_pfn = NODE_DATA(nid)->node_start_pfn; - unsigned long end_pfn = start_pfn + NODE_DATA(nid)->node_present_pages; + max_zone_pfn[ZONE_DMA] = dma_local_pfn; + max_zone_pfn[ZONE_NORMAL] = max_pfn; - if (dma_local_pfn >= end_pfn - start_pfn) - zones_size[ZONE_DMA] = end_pfn - start_pfn; - else { - zones_size[ZONE_DMA] = dma_local_pfn; - zones_size[ZONE_NORMAL] = (end_pfn - start_pfn) - dma_local_pfn; - } - node_set_state(nid, N_NORMAL_MEMORY); - free_area_init_node(nid, zones_size, start_pfn, NULL); - } + free_area_init(max_zone_pfn); /* Initialize the kernel's ZERO_PGE. */ memset((void *)ZERO_PGE, 0, PAGE_SIZE);
--
2.25.1