From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: stefan.wahren@i2se.com, f.fainelli@gmail.com, catalin.marinas@arm.com, phil@raspberrypi.org, robin.murphy@arm.com, Jisheng.Zhang@synaptics.com, mbrugger@suse.com, will@kernel.org, hch@lst.de, Nicolas Saenz Julienne <nsaenzjulienne@suse.de>, m.szyprowski@samsung.com Subject: [RFC 1/4] arm64: mm: use arm64_dma_phys_limit instead of calling max_zone_dma_phys() Date: Wed, 17 Jul 2019 17:31:32 +0200 Message-ID: <20190717153135.15507-2-nsaenzjulienne@suse.de> (raw) In-Reply-To: <20190717153135.15507-1-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> --- 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; -- 2.22.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply index Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-07-17 15:31 [RFC 0/4] Raspberry Pi 4 DMA addressing support Nicolas Saenz Julienne 2019-07-17 15:31 ` Nicolas Saenz Julienne [this message] 2019-07-17 15:31 ` [RFC 2/4] arm64: mm: parse dma-ranges in order to better estimate arm64_dma_phys_limit Nicolas Saenz Julienne 2019-07-24 13:54 ` Catalin Marinas 2019-07-17 15:31 ` [RFC 3/4] dma-direct: add dma_direct_min_mask Nicolas Saenz Julienne 2019-07-18 9:15 ` Christoph Hellwig 2019-07-18 11:18 ` Nicolas Saenz Julienne 2019-07-19 13:08 ` Nicolas Saenz Julienne 2019-07-24 13:51 ` Catalin Marinas 2019-07-24 13:56 ` Christoph Hellwig 2019-07-24 14:27 ` Nicolas Saenz Julienne 2019-07-17 15:31 ` [RFC 4/4] arm64: mm: set direct_dma_min_mask according to dma-ranges Nicolas Saenz Julienne
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