Building of arch/arm/plat-mxc/ssi-fiq.S failed w/ THUMB2 enabled?

On Fri, Jan 20, 2012 at 11:52:17AM +0000, Russell King - ARM Linux wrote:

On Fri, Dec 02, 2011 at 11:24:18AM +0100, Uwe Kleine-K?nig wrote:

quoted

On Fri, Dec 02, 2011 at 06:01:08PM +0800, Eric Miao wrote:

quoted

Hi Dave & Sascha,

I checked the log of this file, found a THUMB2 related changes, yet
I'm still having the failure below, can you help do a quick check?

the problem is that in Thumb most commands don't work with r8-r15
because there are only three bits used to encode them. This is
unfortunate as the other registers are not banked for FIQ.

The best possibility I see is to save some unbanked registers to the
banked registers on entry and restore them on exception exit.

Or always build this as ARM code.

That should work, sure -- I prefer to keep the number of instances where
we need to do this to a minimum if we can, though.

Cheers
---Dave