linux-kernel - [PATCH 2/4] dma-pool: Get rid of dma_in_atomic

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Date:   Thu,  9 Jul 2020 18:19:02 +0200
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     hch@....de, Robin Murphy <robin.murphy@....com>,
        David Rientjes <rientjes@...gle.com>,
        iommu@...ts.linux-foundation.org,
        Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     linux-rpi-kernel@...ts.infradead.org, jeremy.linton@....com,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] dma-pool: Get rid of dma_in_atomic_pool()

The function is only used once and can be simplified to a one-liner.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
---
 kernel/dma/pool.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/kernel/dma/pool.c b/kernel/dma/pool.c
index 8cfa01243ed2..7363640fc91c 100644
--- a/kernel/dma/pool.c
+++ b/kernel/dma/pool.c
@@ -217,15 +217,6 @@ static inline struct gen_pool *dev_to_pool(struct device *dev)
 	return atomic_pool_kernel;
 }
 
-static bool dma_in_atomic_pool(struct device *dev, void *start, size_t size)
-{
-	struct gen_pool *pool = dev_to_pool(dev);
-
-	if (unlikely(!pool))
-		return false;
-	return gen_pool_has_addr(pool, (unsigned long)start, size);
-}
-
 void *dma_alloc_from_pool(struct device *dev, size_t size,
 			  struct page **ret_page, gfp_t flags)
 {
@@ -256,7 +247,7 @@ bool dma_free_from_pool(struct device *dev, void *start, size_t size)
 {
 	struct gen_pool *pool = dev_to_pool(dev);
 
-	if (!dma_in_atomic_pool(dev, start, size))
+	if (!pool || !gen_pool_has_addr(pool, (unsigned long)start, size))
 		return false;
 	gen_pool_free(pool, (unsigned long)start, size);
 	return true;
-- 
2.27.0