linux-kernel - [PATCH v2 0/2] locking/rwsem: Convert rwsem count to atomic_long

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Fri,  3 Jun 2016 22:26:01 -0700
From:	Jason Low <jason.low2@....com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Tony Luck <tony.luck@...el.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Terry Rudd <terry.rudd@....com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Davidlohr Bueso <dave@...olabs.net>,
	Waiman Long <Waiman.Long@....com>,
	Tim Chen <tim.c.chen@...ux.intel.com>,
	Peter Hurley <peter@...leysoftware.com>,
	Jason Low <jason.low2@...com>
Subject: [PATCH v2 0/2] locking/rwsem: Convert rwsem count to atomic_long_t

v1->v2:
- Also convert sem->count usages in arch/{alph,ia64}/include/asm/rwsem.h
  to be used as atomic_long_t.

- Merge the patches to remove rwsem_atomic_add() and rwsem_atomic_update()
  across the various architectures into one patch.

This series converts the rwsem count variable to an atomic_long_t
since it is used it as an atomic variable. This allows us to also remove
the rwsem_atomic_{add,update} abstraction and reduce 100+ lines of code.

Jason Low (2):
  locking/rwsem: Convert sem->count to atomic_long_t
  Remove rwsem_atomic_add() and rwsem_atomic_update()

 arch/alpha/include/asm/rwsem.h | 68 ++++++++----------------------------------
 arch/ia64/include/asm/rwsem.h  | 31 ++++++++-----------
 arch/s390/include/asm/rwsem.h  | 37 -----------------------
 arch/x86/include/asm/rwsem.h   | 18 -----------
 include/asm-generic/rwsem.h    | 22 ++------------
 include/linux/rwsem.h          |  6 ++--
 kernel/locking/rwsem-xadd.c    | 32 ++++++++++----------
 7 files changed, 48 insertions(+), 166 deletions(-)

-- 
2.1.4