From: Will Deacon <will.deacon@arm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: torvalds@linux-foundation.org, mingo@kernel.org,
tglx@linutronix.de, 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,
schwidefsky@de.ibm.com, dalias@libc.org, davem@davemloft.net,
cmetcalf@mellanox.com, jcmvbkbc@gmail.com, arnd@arndb.de,
dbueso@suse.de, fengguang.wu@intel.com
Subject: Re: [PATCH -v2 00/33] implement atomic_fetch_$op
Date: Wed, 1 Jun 2016 15:06:29 +0100 [thread overview]
Message-ID: <20160601140628.GD355@arm.com> (raw)
In-Reply-To: <20160531101925.702692792@infradead.org>
On Tue, May 31, 2016 at 12:19:25PM +0200, Peter Zijlstra wrote:
> As there have been a few requests for atomic_fetch_$op primitives and recently
> by Linus, I figured I'd go and implement the lot.
>
> The atomic_fetch_$op differs from the existing atomic_$op_return we already
> have by returning the old value instead of the new value. This is especially
> useful when the operation is irreversible (like bitops), and allows for things
> like test-and-set.
>
> This version incorporates all feedback from last time and is now complete thanks
> to Will implementing ARMv8.1-LSE versions.
>
> No known build breakage from the build-bot.
>
> Notes:
> - arc asm/atomic.h is a bit of a mess after the eznps merge, I would
> recommend a restructure or split of that file, but could not find
> the will to do it.
> - arc, metag and tile could convert to _relaxed.
>
> I'm aiming to merge this for v4.8 which should get this a fair few weeks in -next.
Thanks Peter, the arm/arm64 bits all look good to me.
Will
next prev parent reply other threads:[~2016-06-01 14:06 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-31 10:19 [PATCH -v2 00/33] implement atomic_fetch_$op Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 01/33] locking,alpha: Implement atomic{,64}_fetch_{add,sub,and,andnot,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 02/33] locking,arc: Implement atomic_fetch_{add,sub,and,andnot,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 03/33] locking,arm: Implement atomic{,64}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 04/33] locking,arm64: " Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 05/33] arm64: atomic: generate LSE non-return cases using common macros Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 06/33] locking,arm64: Implement atomic{,64}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}() for LSE instructions Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 07/33] locking,avr32: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 08/33] locking,blackfin: " Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 09/33] locking,frv: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 10/33] locking,h8300: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 11/33] locking,hexagon: " Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 12/33] locking,ia64: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 13/33] locking,m32r: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 14/33] locking,m68k: " Peter Zijlstra
2016-06-16 10:08 ` Geert Uytterhoeven
2016-06-16 10:08 ` Geert Uytterhoeven
2016-06-16 10:08 ` Geert Uytterhoeven
2016-06-16 10:13 ` Peter Zijlstra
2016-06-16 10:13 ` Peter Zijlstra
2016-06-16 10:13 ` Peter Zijlstra
2016-06-16 12:43 ` Andreas Schwab
2016-06-16 12:43 ` Andreas Schwab
2016-06-16 12:43 ` Andreas Schwab
2016-06-16 12:43 ` Andreas Schwab
2016-06-16 12:49 ` Peter Zijlstra
2016-06-16 12:49 ` Peter Zijlstra
2016-06-16 12:49 ` Peter Zijlstra
2016-06-16 12:53 ` Andreas Schwab
2016-06-16 12:53 ` Andreas Schwab
2016-06-16 12:53 ` Andreas Schwab
2016-06-16 12:53 ` Andreas Schwab
2016-06-16 14:35 ` Peter Zijlstra
2016-06-16 14:35 ` Peter Zijlstra
2016-06-16 14:35 ` Peter Zijlstra
2016-06-16 14:37 ` Andreas Schwab
2016-06-16 14:37 ` Andreas Schwab
2016-06-16 14:37 ` Andreas Schwab
2016-06-16 14:37 ` Andreas Schwab
2016-06-16 14:56 ` Peter Zijlstra
2016-06-16 14:56 ` Peter Zijlstra
2016-06-16 14:56 ` Peter Zijlstra
2016-06-16 14:56 ` Peter Zijlstra
2016-06-16 15:04 ` Andreas Schwab
2016-06-16 15:04 ` Andreas Schwab
2016-06-16 15:04 ` Andreas Schwab
2016-06-16 15:04 ` Andreas Schwab
2016-06-16 17:44 ` Peter Zijlstra
2016-06-16 17:44 ` Peter Zijlstra
2016-06-16 17:44 ` Peter Zijlstra
2016-06-16 17:44 ` Peter Zijlstra
2016-06-16 19:18 ` Andreas Schwab
2016-06-16 19:18 ` Andreas Schwab
2016-06-16 19:18 ` Andreas Schwab
2016-06-16 19:18 ` Andreas Schwab
2016-06-16 19:55 ` Geert Uytterhoeven
2016-06-16 19:55 ` Geert Uytterhoeven
2016-06-16 19:55 ` Geert Uytterhoeven
2016-06-16 19:55 ` Geert Uytterhoeven
2016-06-16 12:49 ` Peter Zijlstra
2016-06-17 15:40 ` Peter Zijlstra
2016-06-17 15:40 ` Peter Zijlstra
2016-06-17 15:40 ` Peter Zijlstra
2016-06-17 15:40 ` Peter Zijlstra
2016-06-20 17:47 ` Andreas Schwab
2016-06-20 17:47 ` Andreas Schwab
2016-06-20 17:47 ` Andreas Schwab
2016-06-20 17:47 ` Andreas Schwab
2016-06-21 4:27 ` Finn Thain
2016-06-21 4:27 ` Finn Thain
2016-06-21 4:27 ` Finn Thain
2016-06-16 10:13 ` Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 15/33] locking,metag: " Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 16/33] locking,mips: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 17/33] locking,mn10300: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 18/33] locking,parisc: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 19/33] locking,powerpc: Implement atomic{,64}_fetch_{add,sub,and,or,xor}{,_relaxed,_acquire,_release}() Peter Zijlstra
2016-06-01 3:11 ` Boqun Feng
2016-06-01 6:10 ` Boqun Feng
2016-06-01 8:46 ` Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 20/33] locking,s390: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 21/33] locking,sh: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 22/33] locking,sparc: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-05-31 17:50 ` David Miller
2016-05-31 10:19 ` [PATCH -v2 23/33] locking,tile: " Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 24/33] locking,x86: " Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 25/33] locking,xtensa: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 26/33] locking: Fix atomic64_relaxed bits Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 27/33] locking: Implement atomic{,64,_long}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 28/33] locking: Remove linux/atomic.h:atomic_fetch_or Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 29/33] locking: Remove the deprecated atomic_{set,clear}_mask() functions Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 30/33] locking,alpha: Convert to _relaxed atomics Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 31/33] locking,mips: " Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 32/33] locking,qrwlock: Employ atomic_fetch_add_acquire() Peter Zijlstra
2016-05-31 10:19 ` [PATCH -v2 33/33] locking,rwsem: Employ atomic_long_fetch_add() Peter Zijlstra
2016-06-01 14:06 ` Will Deacon [this message]
2016-06-02 9:27 ` [PATCH -v2 00/33] implement atomic_fetch_$op Vineet Gupta
2016-06-02 9:27 ` Vineet Gupta
2016-06-02 9:33 ` Peter Zijlstra
2016-06-02 9:33 ` Peter Zijlstra
2016-06-08 12:43 ` Peter Zijlstra
2016-06-08 12:43 ` Peter Zijlstra
2016-06-08 12:55 ` Ingo Molnar
2016-06-08 12:55 ` Ingo Molnar
2016-06-08 13:32 ` Peter Zijlstra
2016-06-08 13:32 ` Peter Zijlstra
2016-06-08 14:24 ` Vineet Gupta
2016-06-08 14:38 ` Peter Zijlstra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160601140628.GD355@arm.com \
--to=will.deacon@arm.com \
--cc=arnd@arndb.de \
--cc=boqun.feng@gmail.com \
--cc=cmetcalf@mellanox.com \
--cc=dalias@libc.org \
--cc=davem@davemloft.net \
--cc=dbueso@suse.de \
--cc=dhowells@redhat.com \
--cc=egtvedt@samfundet.no \
--cc=fengguang.wu@intel.com \
--cc=fweisbec@gmail.com \
--cc=geert@linux-m68k.org \
--cc=james.hogan@imgtec.com \
--cc=jcmvbkbc@gmail.com \
--cc=jejb@parisc-linux.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@arm.linux.org.uk \
--cc=mingo@kernel.org \
--cc=mpe@ellerman.id.au \
--cc=paulmck@linux.vnet.ibm.com \
--cc=peterz@infradead.org \
--cc=ralf@linux-mips.org \
--cc=realmz6@gmail.com \
--cc=rkuo@codeaurora.org \
--cc=rth@twiddle.net \
--cc=schwidefsky@de.ibm.com \
--cc=tglx@linutronix.de \
--cc=tony.luck@intel.com \
--cc=torvalds@linux-foundation.org \
--cc=vgupta@synopsys.com \
--cc=waiman.long@hpe.com \
--cc=ysato@users.sourceforge.jp \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.