linux-kernel - linux-next: build failure after merge of the akpm tree

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Message-Id: <20140306192234.62ad3ac104a2adc16752b033@canb.auug.org.au>
Date:	Thu, 6 Mar 2014 19:22:34 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Christoph Lameter <cl@...ux.com>
Subject: linux-next: build failure after merge of the akpm tree

Hi Andrew,

After merging the akpm tree, today's linux-next build (sparc64 defconfig)
failed like this:

arch/sparc/kernel/time_64.c: In function 'timer_interrupt':
arch/sparc/kernel/time_64.c:735:28: error: lvalue required as increment operand
arch/sparc/kernel/traps_64.c: In function '__cheetah_flush_icache':
arch/sparc/kernel/traps_64.c:963:2: error: 'pscr_ret__.icache_size' is used uninitialized in this function [-Werror=uninitialized]
arch/sparc/kernel/traps_64.c: In function 'cheetah_flush_dcache':
arch/sparc/kernel/traps_64.c:1002:2: error: 'pscr_ret__.dcache_size' is used uninitialized in this function [-Werror=uninitialized]
arch/sparc/kernel/traps_64.c: In function 'cheetah_plus_parity_error':
arch/sparc/kernel/traps_64.c:1023:2: error: 'pscr_ret__.dcache_size' may be used uninitialized in this function [-Werror=uninitialized]
arch/sparc/kernel/traps_64.c:1020:16: note: 'pscr_ret__.dcache_size' was declared here
arch/sparc/kernel/traps_64.c:1033:33: error: 'pscr_ret__.dcache_line_size' may be used uninitialized in this function [-Werror=uninitialized]
arch/sparc/kernel/traps_64.c:1021:21: note: 'pscr_ret__.dcache_line_size' was declared here
cc1: all warnings being treated as errors
kernel/softirq.c: In function '__do_softirq':
kernel/softirq.c:252:1: error: lvalue required as left operand of assignment
kernel/softirq.c: In function '__raise_softirq_irqoff':
kernel/softirq.c:427:1: error: lvalue required as left operand of assignment
arch/sparc/kernel/ptrace_64.c: In function 'flush_ptrace_access':
arch/sparc/kernel/ptrace_64.c:91:20: error: 'pscr_ret__.dcache_line_size' may be used uninitialized in this function [-Werror=uninitialized]
arch/sparc/kernel/ptrace_64.c:113:20: error: 'pscr_ret__.icache_line_size' may be used uninitialized in this function [-Werror=uninitialized]

Caused by commit 5aa661aa13d4 ("sparc: replace __get_cpu_var uses").

I have reverted that commit for today.

I suspect that this whole series may need more review and work.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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