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From: Ingo Molnar <mingo@kernel.org>
To: Toshi Kani <toshi.kani@hpe.com>
Cc: "Luis R. Rodriguez" <mcgrof@kernel.org>,
	"Maciej W. Rozycki" <macro@linux-mips.org>,
	Julia Lawall <julia.lawall@lip6.fr>,
	Toshi Kani <toshi.kani@hp.com>,
	Paul McKenney <paulmck@linux.vnet.ibm.com>,
	Dave Airlie <airlied@redhat.com>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	linux-arch@vger.kernel.org, X86 ML <x86@kernel.org>,
	Daniel Vetter <daniel.vetter@intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Borislav Petkov <bp@alien8.de>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Andy Lutomirski <luto@kernel.org>,
	Brian Gerst <brgerst@gmail.com>
Subject: Re: Overlapping ioremap() calls, set_memory_*() semantics
Date: Sat, 16 Apr 2016 11:20:18 +0200	[thread overview]
Message-ID: <20160416092018.GA8453@gmail.com> (raw)
Message-ID: <20160416092018.Dt230BCYnB6DS94zx-aJu92rZM0V1fq3q78pvAF5eM0@z> (raw)
In-Reply-To: <1460731649.24985.86.camel@hpe.com>


* Toshi Kani <toshi.kani@hpe.com> wrote:

> On x86, ioremap() and remap_pfn_range() already fail on a conflicting cache
> type if it is not allowed by the rule defined in is_new_memtype_allowed().
>  This exception handling is necessary for remap_pfn_range() called by
> /dev/mem, but I do not think it's necessary for ioremap().  I think we can
> start from adding a warning message to ioremap().

Agreed, we should warn and map the situation before doing any behavioral change 
that isn't a fix.

Thanks,

	Ingo

  parent reply	other threads:[~2016-04-16  9:20 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-03 21:28 Overlapping ioremap() calls, set_memory_*() semantics Luis R. Rodriguez
2016-03-03 21:28 ` Luis R. Rodriguez
2016-03-04  9:44 ` Ingo Molnar
2016-03-04 18:18   ` Toshi Kani
2016-03-04 18:18     ` Toshi Kani
2016-03-04 18:51     ` Luis R. Rodriguez
2016-03-04 21:39       ` Toshi Kani
2016-03-05 11:42       ` Ingo Molnar
2016-03-05 11:40     ` Ingo Molnar
2016-03-07 17:03       ` Toshi Kani
2016-03-07 17:03         ` Toshi Kani
2016-03-08 12:16         ` Ingo Molnar
2016-03-09  0:29           ` Toshi Kani
2016-03-09  9:15             ` Ingo Molnar
2016-03-11 22:13               ` Toshi Kani
2016-03-16  1:45                 ` Luis R. Rodriguez
2016-03-16  1:45                   ` Luis R. Rodriguez
2016-03-17 22:44                   ` Toshi Kani
2016-04-13 21:16                     ` Luis R. Rodriguez
2016-04-15 14:47                       ` Toshi Kani
2016-04-15 14:47                         ` Toshi Kani
2016-04-16  9:20                         ` Ingo Molnar [this message]
2016-04-16  9:20                           ` Ingo Molnar
2016-03-21 17:38               ` Maciej W. Rozycki
2016-04-13 21:03                 ` Luis R. Rodriguez
2016-03-11  6:47         ` Andy Lutomirski
2016-03-11 22:36           ` Toshi Kani
2016-03-13  1:02             ` Andy Lutomirski

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