arm64: simplify detection of memory zone boundaries for UMA configs

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 <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Tested-by: Hoan Tran <[email protected]>	[arm64]
Acked-by: Catalin Marinas <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Brian Cain <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Greentime Hu <[email protected]>
Cc: Greg Ungerer <[email protected]>
Cc: Guan Xuetao <[email protected]>
Cc: Guo Ren <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Ley Foon Tan <[email protected]>
Cc: Mark Salter <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: Max Filippov <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Nick Hu <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Richard Weinberger <[email protected]>
Cc: Rich Felker <[email protected]>
Cc: Russell King <[email protected]>
Cc: Stafford Horne <[email protected]>
Cc: Thomas Bogendoerfer <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>

1 files changed, 0 insertions, 54 deletions

diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 5dae97f2f628..e631e6425165 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -192,8 +192,6 @@ static phys_addr_t __init max_zone_phys(unsigned int zone_bits)
 	return min(offset + (1ULL << zone_bits), memblock_end_of_DRAM());
 }
 
-#ifdef CONFIG_NUMA
-
 static void __init zone_sizes_init(unsigned long min, unsigned long max)
 {
 	unsigned long max_zone_pfns[MAX_NR_ZONES]  = {0};
@@ -209,58 +207,6 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max)
 	free_area_init(max_zone_pfns);
 }
 
-#else
-
-static void __init zone_sizes_init(unsigned long min, unsigned long max)
-{
-	struct memblock_region *reg;
-	unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
-	unsigned long __maybe_unused max_dma, max_dma32;
-
-	memset(zone_size, 0, sizeof(zone_size));
-
-	max_dma = max_dma32 = min;
-#ifdef CONFIG_ZONE_DMA
-	max_dma = max_dma32 = PFN_DOWN(arm64_dma_phys_limit);
-	zone_size[ZONE_DMA] = max_dma - min;
-#endif
-#ifdef CONFIG_ZONE_DMA32
-	max_dma32 = PFN_DOWN(arm64_dma32_phys_limit);
-	zone_size[ZONE_DMA32] = max_dma32 - max_dma;
-#endif
-	zone_size[ZONE_NORMAL] = max - max_dma32;
-
-	memcpy(zhole_size, zone_size, sizeof(zhole_size));
-
-	for_each_memblock(memory, reg) {
-		unsigned long start = memblock_region_memory_base_pfn(reg);
-		unsigned long end = memblock_region_memory_end_pfn(reg);
-
-#ifdef CONFIG_ZONE_DMA
-		if (start >= min && start < max_dma) {
-			unsigned long dma_end = min(end, max_dma);
-			zhole_size[ZONE_DMA] -= dma_end - start;
-			start = dma_end;
-		}
-#endif
-#ifdef CONFIG_ZONE_DMA32
-		if (start >= max_dma && start < max_dma32) {
-			unsigned long dma32_end = min(end, max_dma32);
-			zhole_size[ZONE_DMA32] -= dma32_end - start;
-			start = dma32_end;
-		}
-#endif
-		if (start >= max_dma32 && start < max) {
-			unsigned long normal_end = min(end, max);
-			zhole_size[ZONE_NORMAL] -= normal_end - start;
-		}
-	}
-
-	free_area_init_node(0, zone_size, min, zhole_size);
-}
-
-#endif /* CONFIG_NUMA */
-
 int pfn_valid(unsigned long pfn)
 {
 	phys_addr_t addr = pfn << PAGE_SHIFT;