linux-kernel - [PATCH v2 0/3] Improve bitmap_empty and bitmap

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Message-Id: <1447915724-29709-1-git-send-email-hejianet@gmail.com>
Date:	Thu, 19 Nov 2015 14:48:41 +0800
From:	Jia He <hejianet@...il.com>
To:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Michal Nazarewicz <mina86@...a86.com>,
	Yury Norov <yury.norov@...il.com>, Tejun Heo <tj@...nel.org>,
	Martin Kepplinger <martink@...teo.de>,
	George Spelvin <linux@...izon.com>,
	Ingo Molnar <mingo@...nel.org>, Arnd Bergmann <arnd@...db.de>,
	Jia He <hejianet@...il.com>
Subject: [PATCH v2 0/3] Improve bitmap_empty and bitmap_full

find_fisrt_{zero_}bit are too heavy for bitmap_{full,empty}. We don't 
need to calculate and compare the position of bitmap. This set of patch
instroduces lightweight api and replaces the heavy one.

v2: Move the declarations to linux/bitops.h for compilation

Jia He (3):
  Move 2 mask macro from bitmap.h to bitops.h
  Introduce 2 bit ops api: all_is_bit_{one,zero}
  Replace find_fisrt_{zero_}bit with the new lightweight api

 include/linux/bitmap.h |  7 ++-----
 include/linux/bitops.h |  7 +++++++
 lib/find_bit.c         | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 59 insertions(+), 5 deletions(-)

-- 
2.5.0

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