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Date: Fri, 29 Nov 2013 15:42:14 +0800 From: Axel Lin <axel.lin@...ics.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: "Michael S. Tsirkin" <mst@...hat.com>, Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org Subject: [PATCH] include/linux/kernel.h: Make might_fault to be a nop for !MMU No fault if !MUU, thus make might_fault to be a nop for !MMU. This fixes below build error if !CONFIG_MMU && (CONFIG_PROVE_LOCKING=y || CONFIG_DEBUG_ATOMIC_SLEEP=y): arch/arm/kernel/built-in.o: In function `arch_ptrace': arch/arm/kernel/ptrace.c:852: undefined reference to `might_fault' arch/arm/kernel/built-in.o: In function `restore_sigframe': arch/arm/kernel/signal.c:173: undefined reference to `might_fault' arch/arm/kernel/signal.c:174: undefined reference to `might_fault' arch/arm/kernel/signal.c:175: undefined reference to `might_fault' arch/arm/kernel/signal.c:176: undefined reference to `might_fault' arch/arm/kernel/built-in.o:arch/arm/kernel/signal.c:177: more undefined references to `might_fault' follow make: *** [vmlinux] Error 1 Signed-off-by: Axel Lin <axel.lin@...ics.com> Cc: Michael S. Tsirkin <mst@...hat.com> Cc: Peter Zijlstra <peterz@...radead.org> --- include/linux/kernel.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 2ac0277..8b0ad48 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -193,7 +193,8 @@ extern int _cond_resched(void); (__x < 0) ? -__x : __x; \ }) -#if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_DEBUG_ATOMIC_SLEEP) +#if defined(CONFIG_MMU) && \ + (defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_DEBUG_ATOMIC_SLEEP)) void might_fault(void); #else static inline void might_fault(void) { } -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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