From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: torvalds@linux-foundation.org, mingo@kernel.org,
tglx@linutronix.de, will.deacon@arm.com,
paulmck@linux.vnet.ibm.com, boqun.feng@gmail.com,
waiman.long@hpe.com, fweisbec@gmail.com,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
rth@twiddle.net, vgupta@synopsys.com, linux@arm.linux.org.uk,
egtvedt@samfundet.no, realmz6@gmail.com,
ysato@users.sourceforge.jp, rkuo@codeaurora.org,
tony.luck@intel.com, geert@linux-m68k.org,
james.hogan@imgtec.com, ralf@linux-mips.org, dhowells@redhat.com,
jejb@parisc-linux.org, mpe@ellerman.id.au, dalias@libc.org,
davem@davemloft.net, cmetcalf@mellanox.com, jcmvbkbc@gmail.com,
arnd@arndb.de, dbueso@suse.de, fengguang.wu@intel.com
Subject: Re: [RFC][PATCH 19/31] locking,s390: Implement atomic{,64}_fetch_{add,sub,and,or,xor}()
Date: Mon, 25 Apr 2016 10:06:25 +0200 [thread overview]
Message-ID: <20160425100625.5f250bc1@mschwide> (raw)
In-Reply-To: <20160422093924.273699893@infradead.org>
On Fri, 22 Apr 2016 11:04:32 +0200
Peter Zijlstra <peterz@infradead.org> wrote:
> Implement FETCH-OP atomic primitives, these are very similar to the
> existing OP-RETURN primitives we already have, except they return the
> value of the atomic variable _before_ modification.
>
> This is especially useful for irreversible operations -- such as
> bitops (because it becomes impossible to reconstruct the state prior
> to modification).
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> ---
> arch/s390/include/asm/atomic.h | 42 +++++++++++++++++++++++++++++++----------
> 1 file changed, 32 insertions(+), 10 deletions(-)
That looks good, the code compiles and the functions are generated correctly.
We will know for sure if it works after the first user of these new functions
hit the kernel.
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
next prev parent reply other threads:[~2016-04-25 8:06 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-22 9:04 [RFC][PATCH 00/31] implement atomic_fetch_$op Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 01/31] locking: Flip arguments to atomic_fetch_or Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 10:54 ` Will Deacon
2016-04-22 11:09 ` Geert Uytterhoeven
2016-04-22 11:09 ` Geert Uytterhoeven
2016-04-22 14:18 ` Peter Zijlstra
2016-04-22 14:18 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 02/31] locking,alpha: Implement atomic{,64}_fetch_{add,sub,and,andnot,or,xor}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 16:57 ` Richard Henderson
2016-04-23 1:55 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 03/31] locking,arc: Implement atomic_fetch_{add,sub,and,andnot,or,xor}() Peter Zijlstra
2016-04-22 10:50 ` Vineet Gupta
2016-04-22 10:50 ` Vineet Gupta
2016-04-22 14:16 ` Peter Zijlstra
2016-04-22 14:16 ` Peter Zijlstra
2016-04-25 4:26 ` Vineet Gupta
2016-04-25 4:26 ` Vineet Gupta
2016-04-22 14:26 ` Peter Zijlstra
2016-04-22 14:26 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 04/31] locking,arm: Implement atomic{,64}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 11:35 ` Will Deacon
2016-04-22 11:35 ` Will Deacon
2016-04-22 9:04 ` [RFC][PATCH 05/31] locking,arm64: " Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 11:08 ` Will Deacon
2016-04-22 14:23 ` Will Deacon
2016-04-22 14:23 ` Will Deacon
2016-04-22 9:04 ` [RFC][PATCH 06/31] locking,avr32: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 11:58 ` Hans-Christian Noren Egtvedt
2016-04-22 11:58 ` Hans-Christian Noren Egtvedt
2016-04-22 9:04 ` [RFC][PATCH 07/31] locking,blackfin: " Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 08/31] locking,frv: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 09/31] locking,h8300: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 10/31] locking,hexagon: " Peter Zijlstra
2016-04-23 2:16 ` Peter Zijlstra
2016-04-26 0:39 ` Richard Kuo
2016-04-22 9:04 ` [RFC][PATCH 11/31] locking,ia64: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 12/31] locking,m32r: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 13/31] locking,m68k: " Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 14/31] locking,metag: " Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-30 0:20 ` James Hogan
2016-05-02 8:15 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 15/31] locking,mips: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 16/31] locking,mn10300: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 17/31] locking,parisc: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 18/31] locking,powerpc: Implement atomic{,64}_fetch_{add,sub,and,or,xor}{,_relaxed,_acquire,_release}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 16:41 ` Boqun Feng
2016-04-23 2:31 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 19/31] locking,s390: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-04-25 8:06 ` Martin Schwidefsky [this message]
2016-04-25 8:06 ` Martin Schwidefsky
2016-04-25 8:26 ` Peter Zijlstra
2016-04-25 8:26 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 20/31] locking,sh: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 21/31] locking,sparc: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 22/31] locking,tile: " Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-25 21:10 ` Chris Metcalf
[not found] ` <571E840A.8090703@mellanox.com>
2016-04-26 15:28 ` Peter Zijlstra
2016-04-26 15:32 ` Chris Metcalf
2016-04-22 9:04 ` [RFC][PATCH 23/31] locking,x86: " Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 24/31] locking,xtensa: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 25/31] locking: Fix atomic64_relaxed bits Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 26/31] locking: Implement atomic{,64,_long}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}() Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 27/31] locking: Remove linux/atomic.h:atomic_fetch_or Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 13:02 ` Will Deacon
2016-04-22 14:21 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 28/31] locking: Remove the deprecated atomic_{set,clear}_mask() functions Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 29/31] locking,alpha: Convert to _relaxed atomics Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 30/31] locking,mips: " Peter Zijlstra
2016-04-22 9:04 ` Peter Zijlstra
2016-04-22 9:04 ` [RFC][PATCH 31/31] locking,qrwlock: Employ atomic_fetch_add_acquire() Peter Zijlstra
2016-04-22 14:25 ` Waiman Long
2016-04-22 9:44 ` [RFC][PATCH 00/31] implement atomic_fetch_$op Peter Zijlstra
2016-04-22 9:44 ` Peter Zijlstra
2016-04-22 12:56 ` Fengguang Wu
2016-04-22 13:03 ` Will Deacon
2016-04-22 13:03 ` Will Deacon
2016-04-22 14:23 ` Peter Zijlstra
2016-04-23 1:59 ` Fengguang Wu
2016-04-22 18:35 ` Kalle Valo
2016-04-23 3:23 ` Fengguang Wu
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