Messages in this thread |  | | | Date | Sun, 10 Jun 2012 18:45:52 +0800 | | Subject | When switch_mm with thread migration, Why flush instruction cache on ARM platform? | | From | Li Haifeng <> |
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Can someone tell me why flush instruction cache @118 Line below, when switch_mm with thread migration from other ARM core.
107 static inline void 108 switch_mm(struct mm_struct *prev, struct mm_struct *next, 109 struct task_struct *tsk) 110 { 111 #ifdef CONFIG_MMU 112 unsigned int cpu = smp_processor_id(); 113 114 #ifdef CONFIG_SMP 115 /* check for possible thread migration */ 116 if (!cpumask_empty(mm_cpumask(next)) && 117 !cpumask_test_cpu(cpu, mm_cpumask(next))) 118 __flush_icache_all(); 119 #endif ... 130 #endif 131 } Thanks. -- 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/
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