From: Arnd Bergmann <arnd@arndb.de> To: Vinod Koul <vinod.koul@intel.com> Cc: Arnd Bergmann <arnd@arndb.de>, Stephen Warren <swarren@wwwdotorg.org>, Lee Jones <lee@kernel.org>, Eric Anholt <eric@anholt.net>, Martin Sperl <kernel@martin.sperl.org>, dmaengine@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] dmaengine: bcm2835: fix 64-bit warning Date: Thu, 30 Jun 2016 14:47:10 +0200 [thread overview] Message-ID: <20160630124845.184259-1-arnd@arndb.de> (raw) When building this driver on arm64, we get a harmless type mismatch warning: drivers/dma/bcm2835-dma.c: In function 'bcm2835_dma_fill_cb_chain_with_sg': include/linux/kernel.h:743:17: warning: comparison of distinct pointer types lacks a cast (void) (&_min1 == &_min2); \ ^ drivers/dma/bcm2835-dma.c:409:21: note: in expansion of macro 'min' cb->cb->length = min(len, max_len); This changes the type of the 'len' variable to size_t, which avoids the problem. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 388cc7a281c0 ("dmaengine: bcm2835: add slave_sg support to bcm2835-dma") --- drivers/dma/bcm2835-dma.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c index 9ecb94238aaf..e18dc596cf24 100644 --- a/drivers/dma/bcm2835-dma.c +++ b/drivers/dma/bcm2835-dma.c @@ -393,11 +393,12 @@ static void bcm2835_dma_fill_cb_chain_with_sg( unsigned int sg_len) { struct bcm2835_chan *c = to_bcm2835_dma_chan(chan); - size_t max_len = bcm2835_dma_max_frame_length(c); - unsigned int i, len; + size_t len, max_len; + unsigned int i; dma_addr_t addr; struct scatterlist *sgent; + max_len = bcm2835_dma_max_frame_length(c); for_each_sg(sgl, sgent, sg_len, i) { for (addr = sg_dma_address(sgent), len = sg_dma_len(sgent); len > 0; -- 2.9.0
WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH] dmaengine: bcm2835: fix 64-bit warning Date: Thu, 30 Jun 2016 14:47:10 +0200 [thread overview] Message-ID: <20160630124845.184259-1-arnd@arndb.de> (raw) When building this driver on arm64, we get a harmless type mismatch warning: drivers/dma/bcm2835-dma.c: In function 'bcm2835_dma_fill_cb_chain_with_sg': include/linux/kernel.h:743:17: warning: comparison of distinct pointer types lacks a cast (void) (&_min1 == &_min2); \ ^ drivers/dma/bcm2835-dma.c:409:21: note: in expansion of macro 'min' cb->cb->length = min(len, max_len); This changes the type of the 'len' variable to size_t, which avoids the problem. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 388cc7a281c0 ("dmaengine: bcm2835: add slave_sg support to bcm2835-dma") --- drivers/dma/bcm2835-dma.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c index 9ecb94238aaf..e18dc596cf24 100644 --- a/drivers/dma/bcm2835-dma.c +++ b/drivers/dma/bcm2835-dma.c @@ -393,11 +393,12 @@ static void bcm2835_dma_fill_cb_chain_with_sg( unsigned int sg_len) { struct bcm2835_chan *c = to_bcm2835_dma_chan(chan); - size_t max_len = bcm2835_dma_max_frame_length(c); - unsigned int i, len; + size_t len, max_len; + unsigned int i; dma_addr_t addr; struct scatterlist *sgent; + max_len = bcm2835_dma_max_frame_length(c); for_each_sg(sgl, sgent, sg_len, i) { for (addr = sg_dma_address(sgent), len = sg_dma_len(sgent); len > 0; -- 2.9.0
next reply other threads:[~2016-06-30 12:53 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-06-30 12:47 Arnd Bergmann [this message] 2016-06-30 12:47 ` [PATCH] dmaengine: bcm2835: fix 64-bit warning Arnd Bergmann 2016-07-01 3:10 ` Vinod Koul 2016-07-01 3:10 ` Vinod Koul
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