linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Peter Zijlstra <peterz@infradead.org>
To: 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
Cc: 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,
	peterz@infradead.org, dbueso@suse.de, fengguang.wu@intel.com
Subject: [PATCH -v2 00/33] implement atomic_fetch_$op
Date: Tue, 31 May 2016 12:19:25 +0200	[thread overview]
Message-ID: <20160531101925.702692792@infradead.org> (raw)

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.

             reply	other threads:[~2016-05-31 10:37 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-31 10:19 Peter Zijlstra [this message]
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 10:13     ` Peter Zijlstra
2016-06-16 12:43       ` Andreas Schwab
2016-06-16 12:49         ` Peter Zijlstra
2016-06-16 12:53           ` Andreas Schwab
2016-06-16 14:35             ` Peter Zijlstra
2016-06-16 14:37               ` Andreas Schwab
2016-06-16 14:56                 ` Peter Zijlstra
2016-06-16 15:04                   ` Andreas Schwab
2016-06-16 17:44                     ` Peter Zijlstra
2016-06-16 19:18                       ` Andreas Schwab
2016-06-16 19:55                       ` Geert Uytterhoeven
2016-06-17 15:40         ` Peter Zijlstra
2016-06-20 17:47           ` Andreas Schwab
2016-06-21  4:27             ` Finn Thain
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 ` [PATCH -v2 00/33] implement atomic_fetch_$op Will Deacon
2016-06-02  9:27 ` Vineet Gupta
2016-06-02  9:33   ` Peter Zijlstra
2016-06-08 12:43     ` Peter Zijlstra
2016-06-08 12:55       ` Ingo Molnar
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=20160531101925.702692792@infradead.org \
    --to=peterz@infradead.org \
    --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=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=will.deacon@arm.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).