From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [GIT PULL] prefetch support for 3.13
Date: Mon, 11 Nov 2013 11:25:54 +0000 [thread overview]
Message-ID: <20131111112554.GE28302@mudshark.cambridge.arm.com> (raw)
In-Reply-To: <20131111090810.GI14892@pengutronix.de>
On Mon, Nov 11, 2013 at 09:08:10AM +0000, Uwe Kleine-K?nig wrote:
> Hello Will,
>
> On Wed, Oct 09, 2013 at 06:13:13PM +0100, Will Deacon wrote:
> > The following changes since commit 15c03dd4859ab16f9212238f29dd315654aa94f6:
> >
> > Linux 3.12-rc3 (2013-09-29 15:02:38 -0700)
> >
> > are available in the git repository at:
> >
> > git://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git for-rmk/prefetch
> >
> > for you to fetch changes up to d779c07dd72098a7416d907494f958213b7726f3:
> >
> > ARM: bitops: prefetch the destination word for write prior to strex (2013-09-30 16:42:56 +0100)
> >
> > ----------------------------------------------------------------
> > Will Deacon (6):
> > ARM: prefetch: remove redundant "cc" clobber
> > ARM: smp_on_up: move inline asm ALT_SMP patching macro out of spinlock.h
> > ARM: prefetch: add support for prefetchw using pldw on SMP ARMv7+ CPUs
> > ARM: locks: prefetch the destination word for write prior to strex
> > ARM: atomics: prefetch the destination word for write prior to strex
> > ARM: bitops: prefetch the destination word for write prior to strex
> Hello Will,
>
> it seems the last patch breaks on efm32:
>
> arch/arm/lib/changebit.S: Assembler messages:
> arch/arm/lib/changebit.S:15: Error: architectural extension `mp' is not allowed for the current base architecture
I see gas is being as helpful as ever. Something like the (untested) patch
below should fix the issue.
Will
--->8
diff --git a/arch/arm/lib/bitops.h b/arch/arm/lib/bitops.h
index e0c68d5bb7dc..52886b89706c 100644
--- a/arch/arm/lib/bitops.h
+++ b/arch/arm/lib/bitops.h
@@ -10,7 +10,7 @@ UNWIND( .fnstart )
and r3, r0, #31 @ Get bit offset
mov r0, r0, lsr #5
add r1, r1, r0, lsl #2 @ Get word offset
-#if __LINUX_ARM_ARCH__ >= 7
+#if __LINUX_ARM_ARCH__ >= 7 && defined(CONFIG_SMP)
.arch_extension mp
ALT_SMP(W(pldw) [r1])
ALT_UP(W(nop))
next prev parent reply other threads:[~2013-11-11 11:25 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-09 17:13 [GIT PULL] prefetch support for 3.13 Will Deacon
2013-10-30 15:24 ` Paul Walmsley
2013-10-30 15:25 ` Russell King - ARM Linux
2013-10-30 15:32 ` Stephen Warren
2013-10-30 15:53 ` Paul Walmsley
2013-10-30 16:01 ` Russell King - ARM Linux
2013-11-11 9:08 ` Uwe Kleine-König
2013-11-11 10:31 ` Russell King - ARM Linux
2013-11-11 11:25 ` Will Deacon [this message]
2013-11-19 9:27 ` Uwe Kleine-König
2013-11-19 12:01 ` Will Deacon
2013-11-24 9:54 ` Dirk Behme
2013-11-24 10:11 ` Russell King - ARM Linux
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