linux-kernel - Re: [PATCH v2] ARM: OMAP5: Switch to THUMB mode if needed on secondary CPU

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Date:	Fri, 25 Apr 2014 09:27:59 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Joel Fernandes <joelf@...com>
Cc:	Linux OMAP List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Russell King <linux@....linux.org.uk>,
	Nishanth Menon <nm@...com>
Subject: Re: [PATCH v2] ARM: OMAP5: Switch to THUMB mode if needed on
 secondary CPU

* Joel Fernandes <joelf@...com> [140422 12:41]:
> On my DRA7 system, when the kernel is built in Thumb-2 mode, the secondary CPU
> (Cortex A15) fails to come up causing SMP boot on second CPU to timeout. This
> seems to be because the CPU is in ARM mode once the ROM hands over control to
> the kernel.  Switch to Thumb-2 mode if required once the kernel is control of
> secondary CPU. On OMAP4 on the other hand, it appears to be in Thumb-2 mode on
> entry so this is not required and SMP boot works as is.
> 
> Also corrected a spurious '+' and updated copyright information.
> 
> Cc: Santosh Shilimkar <santosh.shilimkar@...com>
> Cc: Russell King <linux@....linux.org.uk>
> Cc: Nishanth Menon <nm@...com>
> Cc: Tony Lindgren <tony@...mide.com>
> Tested-by: Nishanth Menon <nm@...com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@...com>
> Signed-off-by: Joel Fernandes <joelf@...com>

Thanks applying into omap-for-v3.15/fixes-v2.

Tony
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