From: Wei Yang <richard.weiyang@gmail.com>
To: shli@fb.com, neilb@suse.com
Cc: linux-kernel@vger.kernel.org, Wei Yang <richard.weiyang@gmail.com>
Subject: [PATCH] bitops.h: use BITS_PER_LONG to simplify BITS_TO_LONGS
Date: Sat, 18 Mar 2017 08:37:43 +0800 [thread overview]
Message-ID: <20170318003743.24639-1-richard.weiyang@gmail.com> (raw)
The second parameter is the number of bits for type "long", which is
already defined in header file.
This patch replace the calculation with macro to make it more readable.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
---
include/linux/bitops.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index a83c822c35c2..923fe72d31e3 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -10,7 +10,7 @@
#define BIT_ULL_MASK(nr) (1ULL << ((nr) % BITS_PER_LONG_LONG))
#define BIT_ULL_WORD(nr) ((nr) / BITS_PER_LONG_LONG)
#define BITS_PER_BYTE 8
-#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
+#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_LONG)
#endif
/*
--
2.11.0
next reply other threads:[~2017-03-18 1:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-18 0:37 Wei Yang [this message]
2017-05-02 13:28 ` [PATCH] bitops.h: use BITS_PER_LONG to simplify BITS_TO_LONGS Wei Yang
2017-05-02 21:45 ` NeilBrown
2017-05-03 1:06 ` Wei Yang
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