+ if (!asid) { /* fix version if needed */
+ struct task_struct *p;
+
+ for_each_process(p) {
+ if ((p->mm))
+ cpu_context(cpu, p->mm) = 0;
+ }
It is not safe. When the processor is executing these codes, another processor is freeing task_struct, setting p->mm to NULL, and freeing mm_struct.
I committed a patch to solve this problem.Please see https://patchwork.linux-mips.org/patch/13789/.
