linux-kernel - Re: metag build errors in mainline kernel

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Message-ID: <20180221122719.GI29460@jhogan-linux.mipstec.com>
Date:   Wed, 21 Feb 2018 12:27:19 +0000
From:   James Hogan <james.hogan@...s.com>
To:     Guenter Roeck <linux@...ck-us.net>
CC:     <linux-kernel@...r.kernel.org>, <linux-metag@...r.kernel.org>
Subject: Re: metag build errors in mainline kernel

On Tue, Feb 20, 2018 at 03:44:43PM -0800, Guenter Roeck wrote:
> The following errors are seen when building the kernel with the latest
> available metag toolchain (4.2.4 (IMG-1.4.0.700)). Kernel version tested
> is (v4.16-rc2-64-gaf3e79d29555).
> 
> metag:allmodconfig
> 
> arch/metag/kernel/devtree.c:54: error: implicit declaration of function 'pr_info'
> 
> arch/metag/kernel/perf/perf_event.c:831: error: label ‘out’ used but not defined
> arch/metag/kernel/perf/perf_event.c:822: warning: unused variable ‘cpu’

Thanks, these are easy enough for me to fix up.

> 
> metag:meta2_smp_defconfig
> 
> kernel/time/hrtimer.c: In function 'hrtimer_run_softirq':
> time/hrtimer.c:1431: error: unable to find a register to spill in class 'Yr_REGS'
> time/hrtimer.c:1431: error: this is the insn:
> (insn:HI 41 40 99 2 kernel/time/hrtimer.c:576 (set (mem/s/j:DI (plus:SI (reg/f:SI 15 D1.7 [orig:84 D.45290 ] [84])
>                 (const_int 368 [0x170])) [0 <variable>.offset+0 S8 A128])
> 	(reg:DI 99 [ <variable>.offset ])) 211 {*sto_di_1_1_off12} (nil)
>     (expr_list:REG_DEAD (reg:DI 99 [ <variable>.offset ])
> 	(nil)))
> kernel/time/hrtimer.c:1431: confused by earlier errors, bailing out

Hmm.. ancient shelved toolchain. Perhaps this is the excuse we need to
say goodbye to arch/metag/...

Cheers
James

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