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authorRussell King2005-07-28 20:32:47 +0100
committerRussell King2005-07-28 20:32:47 +0100
commit505d7b193181be029f4f9aea59e6bdbfdd1e9e76 (patch)
treeffcdb1fe79171bb0e6e02c0c197541d1b73ad5b0
parent41c018b7ecb60b1c2c4d5dee0cd37d32a94c45af (diff)
[ARM SMP] Ensure secondary CPUs have a clean TLB
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>
-rw-r--r--arch/arm/kernel/smp.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 295e0a8379cf..b2085735a2ba 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -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();