netdev - [PATCH 1/6] dma-direct: add depdenencies to CONFIG_DMA_GLOBAL

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Message-Id: <20231009074121.219686-2-hch@lst.de>
Date: Mon,  9 Oct 2023 09:41:16 +0200
From: Christoph Hellwig <hch@....de>
To: iommu@...ts.linux.dev
Cc: Robin Murphy <robin.murphy@....com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Wei Fang <wei.fang@....com>,
	Shenwei Wang <shenwei.wang@....com>,
	Clark Wang <xiaoning.wang@....com>,
	NXP Linux Team <linux-imx@....com>,
	linux-m68k@...ts.linux-m68k.org,
	netdev@...r.kernel.org,
	Jim Quinlan <james.quinlan@...adcom.com>
Subject: [PATCH 1/6] dma-direct: add depdenencies to CONFIG_DMA_GLOBAL_POOL

CONFIG_DMA_GLOBAL_POOL can't be combined with other dma-coherent
allocators.  Add dependencies to Kconfig to document this, and make
kconfig complain about unment dependencies if someone tries.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 kernel/dma/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
index f488997b071712..4524db877eba36 100644
--- a/kernel/dma/Kconfig
+++ b/kernel/dma/Kconfig
@@ -135,6 +135,8 @@ config DMA_COHERENT_POOL
 
 config DMA_GLOBAL_POOL
 	select DMA_DECLARE_COHERENT
+	depends on !ARCH_HAS_DMA_SET_UNCACHED
+	depends on !DMA_DIRECT_REMAP
 	bool
 
 config DMA_DIRECT_REMAP
-- 
2.39.2