From: mzoran@crowfest•net (Michael Zoran)
To: linux-arm-kernel@lists•infradead.org
Subject: ARM64: Disabling warnings about deprecated armv8 instructions
Date: Sun, 22 Jan 2017 00:58:48 -0800 [thread overview]
Message-ID: <1485075528.14345.1.camel@crowfest.net> (raw)
In-Reply-To: <9647813.NZ2c5cYUSH@localhost>
On Sun, 2017-01-22 at 09:52 +0100, Alexander Stein wrote:
> Hi Michael,
>
> On Sunday, January 22, 2017, 12:07:04 AM CET Michael Zoran wrote:
> > I'm not sure if this if the correct place to be asking this.???The
> > RPI
> > 3 running ARM64 is slowly reaching the point of being about to
> > seriously run a 32 bit vender OS like Raspbian.??When running
> > Raspbian,
> > I'm seeing a very large number(thousands) of kernel log messages
> > about
> > deprecated instructions especially setend and barrier instuctions.
> > This can be very annoying and is completely filling the kernel log.
> >
> > I'm considering submitting a patch to add a Kconfig option to
> > disable
> > these warnings with the default being to keep the warnings
> > enabled.??I
> > was wondering if such a patch could be seriously considered.
>
> Could you please provide an example of those warning an what is
> trigging?
> those?
>
> Thanks and best regards,
> Alexander
Sure, here is a snipped from dmesg. I think this is happening because
the entire Raspbian OS is compiled with a custom gcc compiler that is
targeting arm6+VFP.
I can double check, but I think the instructions are being emulated in
hardware so they are just filling the log and slowing things down.
[10685.558480] cp15barrier_handler: 197896 callbacks suppressed
[10685.558487] "Xorg" (656) uses deprecated CP15 Barrier instruction at
0xf707fe9c
[10685.558504] "Xorg" (656) uses deprecated CP15 Barrier instruction at
0xf7015944
[10685.558511] "Xorg" (656) uses deprecated CP15 Barrier instruction at
0xf7012494
[10685.558518] "Xorg" (656) uses deprecated CP15 Barrier instruction at
0xf70159b4
[10685.558527] "Xorg" (656) uses deprecated CP15 Barrier instruction at
0xf7011478
[10685.558533] "Xorg" (656) uses deprecated CP15 Barrier instruction at
0xf70114e8
[10685.558540] "Xorg" (656) uses deprecated CP15 Barrier instruction at
0xf7015944
[10685.558547] "Xorg" (656) uses deprecated CP15 Barrier instruction at
0xf7012494
[10685.558553] "Xorg" (656) uses deprecated CP15 Barrier instruction at
0xf70159b4
[10685.558560] "Xorg" (656) uses deprecated CP15 Barrier instruction at
0xf7011478
[10685.559179] compat_setend_handler: 1078 callbacks suppressed
[10685.559188] "systemd-journal" (138) uses deprecated setend
instruction at 0xf76a66f4
[10685.559196] "systemd-journal" (138) uses deprecated setend
instruction at 0xf76a6bd8
[10685.559209] "systemd-journal" (138) uses deprecated setend
instruction at 0xf76a66f4
[10685.559216] "systemd-journal" (138) uses deprecated setend
instruction at 0xf76a6bd8
[10685.559231] "systemd-journal" (138) uses deprecated setend
instruction at 0xf76a66f4
[10685.559237] "systemd-journal" (138) uses deprecated setend
instruction at 0xf76a6bd8
[10685.559246] "systemd-journal" (138) uses deprecated setend
instruction at 0xf76a66f4
[10685.559253] "systemd-journal" (138) uses deprecated setend
instruction at 0xf76a6bd8
[10685.559269] "systemd-journal" (138) uses deprecated setend
instruction at 0xf76a66f4
[10685.559276] "systemd-journal" (138) uses deprecated setend
instruction at 0xf76a6bd8
next prev parent reply other threads:[~2017-01-22 8:58 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-22 8:07 ARM64: Disabling warnings about deprecated armv8 instructions Michael Zoran
2017-01-22 8:52 ` Alexander Stein
2017-01-22 8:58 ` Michael Zoran [this message]
2017-01-22 9:05 ` Jisheng Zhang
2017-01-22 9:38 ` Michael Zoran
2017-01-22 9:43 ` Ard Biesheuvel
2017-01-22 9:52 ` Michael Zoran
2017-01-22 9:56 ` Michael Zoran
2017-01-22 10:54 ` Ard Biesheuvel
2017-01-22 11:05 ` Michael Zoran
2017-01-22 11:22 ` Michael Zoran
2017-01-22 9:09 ` Ard Biesheuvel
2017-01-22 9:33 ` Michael Zoran
2017-01-22 9:36 ` Ard Biesheuvel
2017-01-22 9:49 ` Michael Zoran
2017-01-22 11:46 ` Alexander Stein
2017-01-22 12:21 ` Michael Zoran
2017-01-22 13:01 ` Ard Biesheuvel
2017-01-22 14:02 ` Michael Zoran
2017-01-22 15:05 ` Ard Biesheuvel
2017-01-30 14:13 ` Russell King - ARM Linux
2017-01-30 14:50 ` Ard Biesheuvel
2017-01-30 16:38 ` Måns Rullgård
2017-01-30 16:58 ` Russell King - ARM Linux
2017-01-30 17:09 ` Ard Biesheuvel
2017-01-30 17:39 ` Eric Anholt
2017-01-30 17:41 ` Michael Zoran
2017-01-30 18:17 ` Måns Rullgård
2017-01-30 18:34 ` Michael Zoran
2017-01-30 18:49 ` Will Deacon
2017-01-30 19:53 ` Michael Zoran
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