From: Peter Zijlstra <peterz@infradead.org>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: "Geert Uytterhoeven" <geert@linux-m68k.org>,
"Linus Torvalds" <torvalds@linux-foundation.org>,
"Ingo Molnar" <mingo@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Will Deacon" <will.deacon@arm.com>,
"Paul McKenney" <paulmck@linux.vnet.ibm.com>,
boqun.feng@gmail.com, waiman.long@hpe.com,
"Frédéric Weisbecker" <fweisbec@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux-Arch <linux-arch@vger.kernel.org>,
"Richard Henderson" <rth@twiddle.net>,
"Vineet Gupta" <vgupta@synopsys.com>,
"Russell King" <linux@arm.linux.org.uk>,
"Hans-Christian Noren Egtvedt" <egtvedt@samfundet.no>,
"Miao Steven" <realmz6@gmail.com>,
"Yoshinori Sato" <ysato@users.sourceforge.jp>,
"Richard Kuo" <rkuo@codeaurora.org>,
"Tony Luck" <tony.luck@intel.com>,
"James Hogan" <james.hogan@imgtec.com>,
"Ralf Baechle" <ralf@linux-mips.org>,
"David Howells" <dhowells@redhat.com>,
"James E.J. Bottomley" <jejb@parisc-linux.org>,
"Michael Ellerman" <mpe@ellerman.id.au>,
"Martin Schwidefsky" <schwidefsky@de.ibm.com>,
"Rich Felker" <dalias@libc.org>,
"David S. Miller" <davem@davemloft.net>,
cmetcalf@mellanox.com, "Max Filippov" <jcmvbkbc@gmail.com>,
"Arnd Bergmann" <arnd@arndb.de>,
dbueso@suse.de, "Wu Fengguang" <fengguang.wu@intel.com>,
linux-m68k <linux-m68k@vger.kernel.org>
Subject: Re: [PATCH -v2 14/33] locking,m68k: Implement atomic_fetch_{add,sub,and,or,xor}()
Date: Thu, 16 Jun 2016 19:44:21 +0200 [thread overview]
Message-ID: <20160616174421.GK30921@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <mvm4m8tw4xz.fsf@hawking.suse.de>
On Thu, Jun 16, 2016 at 05:04:24PM +0200, Andreas Schwab wrote:
> Peter Zijlstra <peterz@infradead.org> writes:
>
> > If not, do you want me to 'fix' this or just remove the comment?
>
> It's not broken, so nothing to fix.
Its non obvious code, that's usually plenty reason to change it.
Geert, you maintain this stuff, what say you? Is there still a good
reason (like supporting ancient compilers that don't do "+d" for
example) to keep the code as is?
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: "Geert Uytterhoeven" <geert@linux-m68k.org>,
"Linus Torvalds" <torvalds@linux-foundation.org>,
"Ingo Molnar" <mingo@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Will Deacon" <will.deacon@arm.com>,
"Paul McKenney" <paulmck@linux.vnet.ibm.com>,
boqun.feng@gmail.com, waiman.long@hpe.com,
"Frédéric Weisbecker" <fweisbec@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux-Arch <linux-arch@vger.kernel.org>,
"Richard Henderson" <rth@twiddle.net>,
"Vineet Gupta" <vgupta@synopsys.com>,
"Russell King" <linux@arm.linux.org.uk>,
"Hans-Christian Noren Egtvedt" <egtvedt@samfundet.no>,
"Miao Steven" <realmz6@gmail.com>,
"Yoshinori Sato" <ysato@users.sourceforge.jp>,
"Richard Kuo" <rkuo@codeaurora.org>,
"Tony Luck" <tony.luck@intel.com>,
"James Hogan" <james.hogan@imgtec.com>,
"Ralf Baechle" <ralf@linux-mips.org>,
"David Howells" <dhowells@redhat.com>
Subject: Re: [PATCH -v2 14/33] locking,m68k: Implement atomic_fetch_{add,sub,and,or,xor}()
Date: Thu, 16 Jun 2016 19:44:21 +0200 [thread overview]
Message-ID: <20160616174421.GK30921@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <mvm4m8tw4xz.fsf@hawking.suse.de>
On Thu, Jun 16, 2016 at 05:04:24PM +0200, Andreas Schwab wrote:
> Peter Zijlstra <peterz@infradead.org> writes:
>
> > If not, do you want me to 'fix' this or just remove the comment?
>
> It's not broken, so nothing to fix.
Its non obvious code, that's usually plenty reason to change it.
Geert, you maintain this stuff, what say you? Is there still a good
reason (like supporting ancient compilers that don't do "+d" for
example) to keep the code as is?
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: "Geert Uytterhoeven" <geert@linux-m68k.org>,
"Linus Torvalds" <torvalds@linux-foundation.org>,
"Ingo Molnar" <mingo@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Will Deacon" <will.deacon@arm.com>,
"Paul McKenney" <paulmck@linux.vnet.ibm.com>,
boqun.feng@gmail.com, waiman.long@hpe.com,
"Frédéric Weisbecker" <fweisbec@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux-Arch <linux-arch@vger.kernel.org>,
"Richard Henderson" <rth@twiddle.net>,
"Vineet Gupta" <vgupta@synopsys.com>,
"Russell King" <linux@arm.linux.org.uk>,
"Hans-Christian Noren Egtvedt" <egtvedt@samfundet.no>,
"Miao Steven" <realmz6@gmail.com>,
"Yoshinori Sato" <ysato@users.sourceforge.jp>,
"Richard Kuo" <rkuo@codeaurora.org>,
"Tony Luck" <tony.luck@intel.com>,
"James Hogan" <james.hogan@imgtec.com>,
"Ralf Baechle" <ralf@linux-mips.org>,
"David Howells" <dhowells@redhat.com>,
"James E.J. Bottomley" <jejb@parisc-linux.org>,
"Michael Ellerman" <mpe@ellerman.id.au>,
"Martin Schwidefsky" <schwidefsky@de.ibm.com>,
"Rich Felker" <dalias@libc.org>,
"David S. Miller" <davem@davemloft.net>,
cmetcalf@mellanox.com, "Max Filippov" <jcmvbkbc@gmail.com>,
"Arnd Bergmann" <arnd@arndb.de>,
dbueso@suse.de, "Wu Fengguang" <fengguang.wu@intel.com>,
linux-m68k <linux-m68k@lists.linux-m68k.org>
Subject: Re: [PATCH -v2 14/33] locking,m68k: Implement atomic_fetch_{add,sub,and,or,xor}()
Date: Thu, 16 Jun 2016 19:44:21 +0200 [thread overview]
Message-ID: <20160616174421.GK30921@twins.programming.kicks-ass.net> (raw)
Message-ID: <20160616174421.dKIUY7gH2kDKZPu4XOhoxt9gbVw_hijgJv4XEpr8k0s@z> (raw)
In-Reply-To: <mvm4m8tw4xz.fsf@hawking.suse.de>
On Thu, Jun 16, 2016 at 05:04:24PM +0200, Andreas Schwab wrote:
> Peter Zijlstra <peterz@infradead.org> writes:
>
> > If not, do you want me to 'fix' this or just remove the comment?
>
> It's not broken, so nothing to fix.
Its non obvious code, that's usually plenty reason to change it.
Geert, you maintain this stuff, what say you? Is there still a good
reason (like supporting ancient compilers that don't do "+d" for
example) to keep the code as is?
next prev parent reply other threads:[~2016-06-16 17:44 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 [this message]
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 ` [PATCH -v2 00/33] implement atomic_fetch_$op Will Deacon
2016-06-02 9:27 ` 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
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