linux-kernel - [PATCH 3/7] dma-mapping: allow using the global coherent pool for !ARM

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Date:   Mon, 12 Jul 2021 08:17:00 +0200
From:   Christoph Hellwig <hch@....de>
To:     iommu@...ts.linux-foundation.org,
        Russell King <linux@...linux.org.uk>,
        Brian Cain <bcain@...eaurora.org>
Cc:     Dillon Min <dillon.minfei@...il.com>,
        Vladimir Murzin <vladimir.murzin@....com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-hexagon@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/7] dma-mapping: allow using the global coherent pool for !ARM

Switch an ifdef so that the global coherent pool is initialized for
any architecture that selects the DMA_GLOBAL_POOL symbol insted of
hardcoding ARM.

Signed-off-by: Christoph Hellwig <hch@....de>
Tested-by: Dillon Min <dillon.minfei@...il.com>
---
 kernel/dma/coherent.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c
index 794e76b03b34..67b126afac5a 100644
--- a/kernel/dma/coherent.c
+++ b/kernel/dma/coherent.c
@@ -361,7 +361,9 @@ static int __init rmem_dma_setup(struct reserved_mem *rmem)
 		pr_err("Reserved memory: regions without no-map are not yet supported\n");
 		return -EINVAL;
 	}
+#endif
 
+#ifdef CONFIG_DMA_GLOBAL_POOL
 	if (of_get_flat_dt_prop(node, "linux,dma-default", NULL)) {
 		WARN(dma_reserved_default_memory,
 		     "Reserved memory: region for default DMA coherent area is redefined\n");
-- 
2.30.2