From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: linux-next: build failure after merge of the akpm tree Date: Thu, 6 Mar 2014 13:48:48 -0800 Message-ID: <20140306134848.7aabdc426fbad30f6e818631@linux-foundation.org> References: <20140306192234.62ad3ac104a2adc16752b033@canb.auug.org.au> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20140306192234.62ad3ac104a2adc16752b033@canb.auug.org.au> Sender: linux-kernel-owner@vger.kernel.org To: Stephen Rothwell Cc: linux-next@vger.kernel.org, linux-kernel@vger.kernel.org, Christoph Lameter List-Id: linux-next.vger.kernel.org On Thu, 6 Mar 2014 19:22:34 +1100 Stephen Rothwell wrote: > 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. Yes, I've disabled the whole series for now. Some of these errors appear to be caused by compiler mishandling, so it's going to be difficult :(