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[ARM SMP] Ensure secondary CPUs have a clean TLB

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Since ARMv6 CPUs will not flush the TLB on context switches, it is
possible that we may end up with some global TLB entries remaining
present, eventually upsetting userspace.  Explicitly flush the
entire TLB on secondary CPUs as they startup, after we have switched
to the init_mm page tables.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2005-07-28 20:32:47 +01:00 committed by Russell King
parent 41c018b7ec
commit 505d7b1931
1 changed files with 1 additions and 0 deletions
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arch/arm/kernel/smp.c
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@ -176,6 +176,7 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
cpu_set(cpu, mm->cpu_vm_mask);
cpu_switch_mm(mm->pgd, mm);
enter_lazy_tlb(mm, current);
local_flush_tlb_all();
cpu_init();