From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Vinod Koul <vkoul@kernel.org>,
dmaengine@vger.kernel.org,
Dan Williams <dan.j.williams@intel.com>,
Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v1 1/4] dmaengine: Refactor dmaengine_check_align() to be bit operations only
Date: Wed, 26 Feb 2020 12:18:38 +0200 [thread overview]
Message-ID: <20200226101842.29426-1-andriy.shevchenko@linux.intel.com> (raw)
There is no need to have branch and temporary variable in the function.
Simple convert it to be a set of bit and arithmetic operations.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
include/linux/dmaengine.h | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 64461fc64e1b..9f3f5582816a 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -1155,14 +1155,7 @@ static inline dma_cookie_t dmaengine_submit(struct dma_async_tx_descriptor *desc
static inline bool dmaengine_check_align(enum dmaengine_alignment align,
size_t off1, size_t off2, size_t len)
{
- size_t mask;
-
- if (!align)
- return true;
- mask = (1 << align) - 1;
- if (mask & (off1 | off2 | len))
- return false;
- return true;
+ return !(((1 << align) - 1) & (off1 | off2 | len));
}
static inline bool is_dma_copy_aligned(struct dma_device *dev, size_t off1,
--
2.25.0
next reply other threads:[~2020-02-26 10:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 10:18 Andy Shevchenko [this message]
2020-02-26 10:18 ` [PATCH v1 2/4] dmaengine: Use negative condition for better readability Andy Shevchenko
2020-02-26 12:36 ` Peter Ujfalusi
2020-02-26 10:18 ` [PATCH v1 3/4] dmaengine: Drop redundant 'else' keyword Andy Shevchenko
2020-02-26 12:37 ` Peter Ujfalusi
2020-02-26 13:44 ` Andy Shevchenko
2020-02-26 10:18 ` [PATCH v1 4/4] dmaengine: consistently return string literal from switch-case Andy Shevchenko
2020-02-26 12:35 ` Peter Ujfalusi
2020-02-26 12:35 ` [PATCH v1 1/4] dmaengine: Refactor dmaengine_check_align() to be bit operations only Peter Ujfalusi
2020-03-02 7:18 ` Vinod Koul
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