[RFC,1/4] arm64: mm: use arm64_dma_phys_limit instead of calling max_zone_dma_phys()
diff mbox series

Message ID 20190717153135.15507-2-nsaenzjulienne@suse.de
State New
Headers show
  • Raspberry Pi 4 DMA addressing support
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Commit Message

Nicolas Saenz Julienne July 17, 2019, 3:31 p.m. UTC
By the time we call zones_sizes_init() arm64_dma_phys_limit already
contains the result of max_zone_dma_phys(). We use the variable instead
of calling the function directly to save some precious cpu time.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
 arch/arm64/mm/init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index f3c795278def..6112d6c90fa8 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -181,7 +181,7 @@  static void __init zone_sizes_init(unsigned long min, unsigned long max)
 	unsigned long max_zone_pfns[MAX_NR_ZONES]  = {0};
-	max_zone_pfns[ZONE_DMA32] = PFN_DOWN(max_zone_dma_phys());
+	max_zone_pfns[ZONE_DMA32] = PFN_DOWN(arm64_dma_phys_limit);
 	max_zone_pfns[ZONE_NORMAL] = max;