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From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: catalin.marinas@arm.com, hch@lst.de, wahrenst@gmx.net,
	marc.zyngier@arm.com, robh+dt@kernel.org
Cc: linux-arm-kernel@lists.infradead.org, f.fainelli@gmail.com,
	robin.murphy@arm.com, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org, mbrugger@suse.com,
	linux-rpi-kernel@lists.infradead.org, phill@raspberrypi.org,
	will@kernel.org, nsaenzjulienne@suse.de,
	m.szyprowski@samsung.com
Subject: [PATCH v6 1/4] arm64: mm: use arm64_dma_phys_limit instead of calling max_zone_dma_phys()
Date: Wed, 11 Sep 2019 20:25:43 +0200
Message-ID: <20190911182546.17094-2-nsaenzjulienne@suse.de> (raw)
In-Reply-To: <20190911182546.17094-1-nsaenzjulienne@suse.de>

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>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/mm/init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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};
 
 #ifdef CONFIG_ZONE_DMA32
-	max_zone_pfns[ZONE_DMA32] = PFN_DOWN(max_zone_dma_phys());
+	max_zone_pfns[ZONE_DMA32] = PFN_DOWN(arm64_dma_phys_limit);
 #endif
 	max_zone_pfns[ZONE_NORMAL] = max;
 
-- 
2.23.0


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Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-11 18:25 [PATCH v6 0/4] Raspberry Pi 4 DMA addressing support Nicolas Saenz Julienne
2019-09-11 18:25 ` Nicolas Saenz Julienne [this message]
2019-09-11 18:25 ` [PATCH v6 2/4] arm64: rename variables used to calculate ZONE_DMA32's size Nicolas Saenz Julienne
2019-09-11 18:25 ` [PATCH v6 3/4] arm64: use both ZONE_DMA and ZONE_DMA32 Nicolas Saenz Julienne
2019-10-21 14:15   ` Qian Cai
2019-10-21 14:34     ` Nicolas Saenz Julienne
2019-10-21 14:46       ` Qian Cai
2019-10-21 17:01         ` Nicolas Saenz Julienne
2019-10-21 17:25           ` Qian Cai
2019-10-21 17:55             ` Nicolas Saenz Julienne
2019-10-21 20:36               ` Qian Cai
2019-10-22 11:23                 ` Nicolas Saenz Julienne
2019-09-11 18:25 ` [PATCH v6 4/4] mm: refresh ZONE_DMA and ZONE_DMA32 comments in 'enum zone_type' Nicolas Saenz Julienne
2019-10-01 16:05 ` [PATCH v6 0/4] Raspberry Pi 4 DMA addressing support Catalin Marinas

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