Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755257Ab2FYJmY (ORCPT ); Mon, 25 Jun 2012 05:42:24 -0400 Received: from mail-bk0-f46.google.com ([209.85.214.46]:43318 "EHLO mail-bk0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752842Ab2FYJmW (ORCPT ); Mon, 25 Jun 2012 05:42:22 -0400 Date: Mon, 25 Jun 2012 11:42:15 +0200 From: Ingo Molnar To: Paul Mundt Cc: Linus Torvalds , linux-kernel@vger.kernel.org, Stephen Rothwell , Randy Dunlap , Andrew Morton , Peter Zijlstra , Thomas Gleixner Subject: [PATCH] bug.h: Fix up x86 build regression Message-ID: <20120625094215.GA25847@gmail.com> References: <20120618045417.GB19803@linux-sh.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20120618045417.GB19803@linux-sh.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5002 Lines: 118 * Paul Mundt wrote: > The asm-generic/bug.h __ASSEMBLY__ guarding is completely bogus, which > tripped up the powerpc build when the kernel.h include was added: > > In file included from include/asm-generic/bug.h:5:0, > from arch/powerpc/include/asm/bug.h:127, > from arch/powerpc/kernel/head_64.S:31: > include/linux/kernel.h:44:0: warning: "ALIGN" redefined [enabled by default] > include/linux/linkage.h:57:0: note: this is the location of the previous definition > include/linux/sysinfo.h: Assembler messages: > include/linux/sysinfo.h:7: Error: Unrecognized opcode: `struct' > include/linux/sysinfo.h:8: Error: Unrecognized opcode: `__kernel_long_t' > > Moving the __ASSEMBLY__ guard up and stashing the kernel.h include under > it fixes this up, as well as covering the case the original fix was > attempting to handle. > > Tested-by: Stephen Rothwell > Acked-by: Arnd Bergmann > Signed-off-by: Paul Mundt This commit broke most x86 !CONFIG_BUG builds in -rc4: In file included from /home/mingo/tip/arch/x86/include/asm/cpumask.h:4:0, from /home/mingo/tip/arch/x86/include/asm/msr.h:18, from /home/mingo/tip/arch/x86/include/asm/processor.h:20, from /home/mingo/tip/arch/x86/include/asm/atomic.h:6, from include/linux/atomic.h:4, from include/linux/crypto.h:20, from arch/x86/kernel/asm-offsets.c:8: include/linux/cpumask.h: In function ‘cpumask_check’: include/linux/cpumask.h:108:2: error: implicit declaration of function ‘WARN_ON_ONCE’ [-Werror=implicit-function-declaration] In file included from include/linux/thread_info.h:54:0, from include/linux/preempt.h:9, from include/linux/spinlock.h:50, from include/linux/mmzone.h:7, from include/linux/gfp.h:4, from include/linux/slab.h:12, from include/linux/crypto.h:24, from arch/x86/kernel/asm-offsets.c:8: /home/mingo/tip/arch/x86/include/asm/thread_info.h: In function ‘set_restore_sigmask’: /home/mingo/tip/arch/x86/include/asm/thread_info.h:251:2: error: implicit declaration of function ‘WARN_ON’ [-Werror=implicit-function-declaration] In file included from /home/mingo/tip/arch/x86/include/asm/apic.h:12:0, from /home/mingo/tip/arch/x86/include/asm/smp.h:13, from include/linux/smp.h:38, from include/linux/topology.h:33, from include/linux/gfp.h:7, from include/linux/slab.h:12, from include/linux/crypto.h:24, from arch/x86/kernel/asm-offsets.c:8: /home/mingo/tip/arch/x86/include/asm/fixmap.h: In function ‘virt_to_fix’: /home/mingo/tip/arch/x86/include/asm/fixmap.h:219:2: error: implicit declaration of function ‘BUG_ON’ [-Werror=implicit-function-declaration] In file included from include/linux/slab.h:185:0, from include/linux/crypto.h:24, from arch/x86/kernel/asm-offsets.c:8: include/linux/slub_def.h: In function ‘kmalloc_index’: include/linux/slub_def.h:192:2: error: implicit declaration of function ‘BUG’ [-Werror=implicit-function-declaration] cc1: some warnings being treated as errors The commit mis-placed the !ASSEMBLY block, mixing it with the CONFIG_BUG section. Hiding an #include deep inside a generic header is in pretty bad taste anyway, it creates kconfig dependent breakages and makes it harder to untangle header files. The patch below fixes most of the bad effects for me on x86, but I have not tested the PowerPC cross-build yet. Signed-off-by: Ingo Molnar diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index 506ec19..25565b7 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -3,6 +3,10 @@ #include +#ifndef __ASSEMBLY__ +#include +#endif /* __ASSEMBLY__ */ + #ifdef CONFIG_BUG #ifdef CONFIG_GENERIC_BUG @@ -31,9 +35,6 @@ struct bug_entry { #endif /* CONFIG_GENERIC_BUG */ -#ifndef __ASSEMBLY__ -#include - /* * Don't use BUG() or BUG_ON() unless there's really no way out; one * example might be detecting data structure corruption in the middle @@ -108,6 +109,7 @@ extern void warn_slowpath_null(const char *file, const int line); }) #else /* !CONFIG_BUG */ + #ifndef HAVE_ARCH_BUG #define BUG() do {} while(0) #endif @@ -203,6 +205,4 @@ extern void warn_slowpath_null(const char *file, const int line); # define WARN_ON_SMP(x) ({0;}) #endif -#endif /* __ASSEMBLY__ */ - #endif -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/