From: David Hildenbrand <dahi@linux.vnet.ibm.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: linux-kernel@vger.kernel.org, mingo@redhat.com,
yang.shi@windriver.com, benh@kernel.crashing.org,
paulus@samba.org, akpm@linux-foundation.org,
heiko.carstens@de.ibm.com, schwidefsky@de.ibm.com,
borntraeger@de.ibm.com, mst@redhat.com, tglx@linutronix.de,
David.Laight@ACULAB.COM, hughd@google.com, hocko@suse.cz,
ralf@linux-mips.org, herbert@gondor.apana.org.au,
linux@arm.linux.org.uk, airlied@linux.ie,
daniel.vetter@intel.com, linux-mm@kvack.org,
linux-arch@vger.kernel.org, peterz@infradead.org
Subject: Re: [PATCH v1 11/15] arm/futex: UP futex_atomic_op_inuser() relies on disabled preemption
Date: Wed, 13 May 2015 10:55:56 +0200 [thread overview]
Message-ID: <20150513105556.2607d99c@thinkpad-w530> (raw)
In-Reply-To: <20150513081956.GB21106@linutronix.de>
> * David Hildenbrand | 2015-05-13 09:38:12 [+0200]:
>
> >Thanks, I'll include it in the next version.
> >
> >So I assume the cleanest thing to do would be:
> >
> >#if __LINUX_ARM_ARCH__ < 6
> > preempt_disable();
> >#endif
>
> Correct. But also for futex_atomic_cmpxchg_inatomic() which also behind
> CONFIG_SMP curtain. That is why I suggested a new patch :)
>
> >David
>
> Sebastian
Ah, okay I think now I got it :)
So both patches are fine for now, but we should replace CONFIG_SMP
by __LINUX_ARM_ARCH__ >=6 in both file, not only in the code I touch (to make
it map arch/arm/include/asm/cmpxchg.h style).
David
next prev parent reply other threads:[~2015-05-13 8:56 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-11 15:52 [PATCH v1 00/15] decouple pagefault_disable() from preempt_disable() David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 01/15] uaccess: count pagefault_disable() levels in pagefault_disabled David Hildenbrand
2015-05-19 7:18 ` [tip:sched/core] sched/preempt, mm/fault: Count pagefault_disable () " tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 02/15] mm, uaccess: trigger might_sleep() in might_fault() with disabled pagefaults David Hildenbrand
2015-05-19 7:18 ` [tip:sched/core] sched/preempt, mm/fault: Trigger " tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 03/15] uaccess: clarify that uaccess may only sleep if pagefaults are enabled David Hildenbrand
2015-05-19 7:18 ` [tip:sched/core] mm/uaccess, mm/fault: Clarify " tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 04/15] mm: explicitly disable/enable preemption in kmap_atomic_* David Hildenbrand
2015-05-19 7:19 ` [tip:sched/core] sched/preempt, mm/kmap: Explicitly disable/ enable " tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 05/15] mips: kmap_coherent relies on disabled preemption David Hildenbrand
2015-05-19 7:19 ` [tip:sched/core] sched/preempt, mm/kmap, MIPS: Disable preemption in kmap_coherent() explicitly tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 06/15] mm: use pagefault_disable() to check for disabled pagefaults in the handler David Hildenbrand
2015-05-19 7:19 ` [tip:sched/core] mm/fault, arch: Use " tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 07/15] drm/i915: use pagefault_disabled() to check for disabled pagefaults David Hildenbrand
2015-05-19 7:20 ` [tip:sched/core] mm/fault, drm/i915: Use " tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 08/15] futex: UP futex_atomic_op_inuser() relies on disabled preemption David Hildenbrand
2015-05-19 7:20 ` [tip:sched/core] sched/preempt, futex: Disable preemption in UP futex_atomic_op_inuser() explicitly tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 09/15] futex: UP futex_atomic_cmpxchg_inatomic() relies on disabled preemption David Hildenbrand
2015-05-19 7:20 ` [tip:sched/core] sched/preempt, futex: Disable preemption in UP futex_atomic_cmpxchg_inatomic() explicitly tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 10/15] arm/futex: UP futex_atomic_cmpxchg_inatomic() relies on disabled preemption David Hildenbrand
2015-05-19 7:21 ` [tip:sched/core] sched/preempt, arm/futex: Disable preemption in UP futex_atomic_cmpxchg_inatomic() explicitly tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 11/15] arm/futex: UP futex_atomic_op_inuser() relies on disabled preemption David Hildenbrand
2015-05-12 19:00 ` Sebastian Andrzej Siewior
2015-05-13 7:38 ` David Hildenbrand
2015-05-13 8:19 ` Sebastian Andrzej Siewior
2015-05-13 8:55 ` David Hildenbrand [this message]
2015-05-19 7:21 ` [tip:sched/core] sched/preempt, arm/futex: Disable preemption in UP futex_atomic_op_inuser() explicitly tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 12/15] futex: clarify that preemption doesn't have to be disabled David Hildenbrand
2015-05-19 7:21 ` [tip:sched/core] sched/preempt, futex: Update comments to " tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 13/15] powerpc: enable_kernel_altivec() requires disabled preemption David Hildenbrand
2015-05-19 7:22 ` [tip:sched/core] sched/preempt, powerpc: Disable preemption in enable_kernel_altivec() explicitly tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 14/15] mips: properly lock access to the fpu David Hildenbrand
2015-05-19 7:22 ` [tip:sched/core] sched/preempt, MIPS: Properly lock access to the FPU tip-bot for David Hildenbrand
2015-05-11 15:52 ` [PATCH v1 15/15] uaccess: decouple preemption from the pagefault logic David Hildenbrand
2015-05-19 7:22 ` [tip:sched/core] sched/preempt, mm/fault: Decouple preemption from the page fault logic tip-bot for David Hildenbrand
2015-05-15 14:23 ` [PATCH v1 00/15] decouple pagefault_disable() from preempt_disable() Thomas Gleixner
2015-05-18 12:46 ` David Hildenbrand
2015-05-18 13:04 ` Peter Zijlstra
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