From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: "Wang, Yalin" <Yalin.Wang@sonymobile.com>
Cc: 'Ard Biesheuvel' <ard.biesheuvel@linaro.org>,
'Will Deacon' <will.deacon@arm.com>,
"'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>,
"'akinobu.mita@gmail.com'" <akinobu.mita@gmail.com>,
"'linux-mm@kvack.org'" <linux-mm@kvack.org>,
'Joe Perches' <joe@perches.com>,
"'linux-arm-kernel@lists.infradead.org'"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [RFC V6 2/3] arm:add bitrev.h file to support rbit instruction
Date: Wed, 14 Jan 2015 16:38:00 +0000 [thread overview]
Message-ID: <20150114163800.GZ12302@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <35FD53F367049845BC99AC72306C23D103EDAF89E198@CNBJMBX05.corpusers.net>
On Fri, Jan 09, 2015 at 08:40:56PM +0800, Wang, Yalin wrote:
> Oh, I see,
> How about change like this:
> + select HAVE_ARCH_BITREVERSE if ((CPU_V7M || CPU_V7) && !CPU_V6 && !CPU_V6K)
> I am not sure if I also need add some older CPU types like !CPU_ARM9TDMI &&a??!CPU_ARM940T ?
>
> Another solution is:
> + select HAVE_ARCH_BITREVERSE if ((CPU_32V7M || CPU_32V7) && !CPU_32V6 && !CPU_32V5 && !CPU_32V4 && !CPU_32V4T && !CPU_32V3)
>
> By the way, I am not clear about the difference between CPU_V6 and CPU_V6K, could you tell me? :)
I think
select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
is sufficient - we don't support mixing pre-v6 and v6+ CPU architectures
into a single kernel.
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next prev parent reply other threads:[~2015-01-14 16:38 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-24 5:10 [PATCH RFC] arm/arm64:add CONFIG_HAVE_ARCH_BITREVERSE to support rbit Wang, Yalin
2014-10-27 6:37 ` [RFC V2] arm/arm64:add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction Wang, Yalin
2014-10-27 6:46 ` Joe Perches
2014-10-27 7:13 ` Wang, Yalin
2014-10-28 21:18 ` [PATCH] carl9170: Convert byte_rev_table uses to bitrev8 Joe Perches
2014-10-28 21:22 ` [PATCH] 6fire: " Joe Perches
2014-10-29 2:42 ` Wang, Yalin
2014-10-29 3:06 ` Joe Perches
2014-10-29 3:10 ` Wang, Yalin
2014-10-29 3:28 ` [RFC V2] arm/arm64:add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction Rob Herring
2014-10-29 5:14 ` [RFC V4 1/3] add " Wang, Yalin
2014-10-29 5:15 ` [RFC V4 2/3] arm:add bitrev.h file " Wang, Yalin
2014-10-29 5:16 ` [RFC V4 3/3] arm64:add " Wang, Yalin
2014-10-29 5:50 ` [RFC V5 1/3] add CONFIG_HAVE_ARCH_BITREVERSE " Wang, Yalin
2014-10-29 5:51 ` [RFC V5 2/3] arm:add bitrev.h file " Wang, Yalin
2014-10-29 5:52 ` [RFC V5 3/3] arm64:add " Wang, Yalin
2014-10-30 12:01 ` Will Deacon
2014-10-30 12:26 ` Ard Biesheuvel
2014-10-30 13:57 ` Will Deacon
2014-10-31 5:40 ` [RFC V6 1/3] add CONFIG_HAVE_ARCH_BITREVERSE " Wang, Yalin
2014-10-31 5:40 ` [RFC V6 2/3] " Wang, Yalin
2014-10-31 5:42 ` [RFC V6 2/3] arm:add bitrev.h file " Wang, Yalin
2014-10-31 7:40 ` [RFC] arm:remove clear_thread_flag(TIF_UPROBE) Wang, Yalin
2014-10-31 7:45 ` Joe Perches
2014-10-31 7:51 ` Wang, Yalin
2014-10-31 7:58 ` Joe Perches
2014-10-31 7:59 ` Wang, Yalin
2014-10-31 8:01 ` [RFC V2] " Wang, Yalin
2014-11-13 23:53 ` [RFC V6 2/3] arm:add bitrev.h file to support rbit instruction Russell King - ARM Linux
2014-11-14 0:05 ` Joe Perches
2014-11-14 0:17 ` Russell King - ARM Linux
2014-11-14 0:45 ` Joe Perches
2014-11-14 1:18 ` Russell King - ARM Linux
2014-11-14 1:26 ` Joe Perches
2014-11-14 9:52 ` Russell King - ARM Linux
2014-11-14 6:37 ` Takashi Iwai
2014-11-14 6:55 ` Joe Perches
2014-11-14 7:03 ` Takashi Iwai
2014-11-14 2:01 ` Wang, Yalin
2014-11-14 9:58 ` Russell King - ARM Linux
2014-11-17 2:38 ` Wang, Yalin
2015-01-08 18:40 ` Russell King - ARM Linux
2015-01-09 2:16 ` Wang, Yalin
2015-01-09 11:10 ` Russell King - ARM Linux
2015-01-09 12:40 ` Wang, Yalin
2015-01-14 16:38 ` Russell King - ARM Linux [this message]
2015-01-16 1:42 ` Wang, Yalin
2014-10-31 7:54 ` [RFC V6 2/3] add CONFIG_HAVE_ARCH_BITREVERSE " Wang, Yalin
2014-10-31 5:41 ` [RFC V6 3/3] arm64:add bitrev.h file " Wang, Yalin
2014-10-31 10:43 ` Will Deacon
2014-11-03 2:17 ` Wang, Yalin
2014-11-03 8:47 ` Ard Biesheuvel
2014-11-03 9:50 ` Will Deacon
2014-11-04 1:45 ` Wang, Yalin
2014-10-31 2:03 ` [RFC V5 " Wang, Yalin
2014-10-29 5:21 ` [RFC V4 1/3] add CONFIG_HAVE_ARCH_BITREVERSE " Joe Perches
2014-10-29 5:36 ` Wang, Yalin
2014-10-29 5:20 ` [RFC V2] arm/arm64:add " Wang, Yalin
2014-10-27 8:02 ` [RFC V3] " Wang, Yalin
2014-10-27 10:48 ` Will Deacon
2014-10-28 1:34 ` Wang, Yalin
2014-10-28 13:59 ` Will Deacon
2014-10-29 2:52 ` Wang, Yalin
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