linux-kernel - [PATCH] arch/h8300: fix kernel/dma.c build warning

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Date:   Fri, 20 Jul 2018 20:17:35 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     LKML <linux-kernel@...r.kernel.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>
Cc:     Rich Felker <dalias@...c.org>, linux-sh@...r.kernel.org
Subject: [PATCH] arch/h8300: fix kernel/dma.c build warning

From: Randy Dunlap <rdunlap@...radead.org>

Fix build warning in arch/hexagon/kernel/dma.c by casting a void *
to unsigned long to match the function parameter type.

../arch/hexagon/kernel/dma.c: In function 'arch_dma_alloc':
../arch/hexagon/kernel/dma.c:51:5: warning: passing argument 2 of 'gen_pool_add' makes integer from pointer without a cast [enabled by default]
../include/linux/genalloc.h:112:19: note: expected 'long unsigned int' but argument is of type 'void *'

Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>
Cc: Rich Felker <dalias@...c.org>
Cc: linux-sh@...r.kernel.org
---
 arch/hexagon/kernel/dma.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-next-20180717.orig/arch/hexagon/kernel/dma.c
+++ linux-next-20180717/arch/hexagon/kernel/dma.c
@@ -47,7 +47,7 @@ void *arch_dma_alloc(struct device *dev,
 			panic("Can't create %s() memory pool!", __func__);
 		else
 			gen_pool_add(coherent_pool,
-				pfn_to_virt(max_low_pfn),
+				(unsigned long)pfn_to_virt(max_low_pfn),
 				hexagon_coherent_pool_size, -1);
 	}