From af1ddcb5c63cfb9744c29e88db0bab6bb25ad76b Mon Sep 17 00:00:00 2001 From: Sudip Mukherjee Date: Fri, 5 Feb 2016 15:36:10 -0800 Subject: [PATCH] m32r: fix build failure due to SMP and MMU One of the randconfig build failed with the error: arch/m32r/kernel/smp.c: In function 'smp_flush_tlb_mm': arch/m32r/kernel/smp.c:283:20: error: subscripted value is neither array nor pointer nor vector mmc = &mm->context[cpu_id]; ^ arch/m32r/kernel/smp.c: In function 'smp_flush_tlb_page': arch/m32r/kernel/smp.c:353:20: error: subscripted value is neither array nor pointer nor vector mmc = &mm->context[cpu_id]; ^ arch/m32r/kernel/smp.c: In function 'smp_invalidate_interrupt': arch/m32r/kernel/smp.c:479:41: error: subscripted value is neither array nor pointer nor vector unsigned long *mmc = &flush_mm->context[cpu_id]; It turned out that CONFIG_SMP was defined but CONFIG_MMU was not defined. But arch/m32r/include/asm/mmu.h only defines mm_context_t as an array when both CONFIG_SMP and CONFIG_MMU are defined. And arch/m32r/kernel/smp.c is always using context as an array. So without MMU SMP can not work. Signed-off-by: Sudip Mukherjee Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/m32r/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig index 836ac5a963c8..2841c0a3fd3b 100644 --- a/arch/m32r/Kconfig +++ b/arch/m32r/Kconfig @@ -276,6 +276,7 @@ source "kernel/Kconfig.preempt" config SMP bool "Symmetric multi-processing support" + depends on MMU ---help--- This enables support for systems with more than one CPU. If you have a system with only one CPU, say N. If you have a system with more