Hello.
On 30-11-2010 22:49, Maksim Rayskiy wrote:
From 9a03661a40407e14ee75295f5541f371f0a7cdda Mon Sep 17 00:00:00 2001
From: Maksim Rayskiy<maksim.rayskiy@xxxxxxxxx>
Date: Tue, 30 Nov 2010 11:34:31 -0800
Subject: [PATCH] MIPS: Added local_flush_tlb_all_mm to clear all mm
contexts on calling cpu
When hotplug removing a cpu, all mm context TLB entries must be cleared
to avoid ASID conflict when cpu is restarted.
New functions local_flush_tlb_all_mm() and all-cpu version
flush_tlb_all_mm() are added.
To function properly, local_flush_tlb_all_mm() must be called when
mm_cpumask for all
mm context on given cpu is cleared.
Signed-off-by: Maksim Rayskiy<maksim.rayskiy@xxxxxxxxx>
[...]
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index c618eed..5c03218 100644
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -66,6 +66,18 @@ extern void build_tlb_refill_handler(void);
#endif
+/* This function will clear all mm contexts on calling cpu
+ * To produce desired effect it must be called
+ * when mm_cpumask for all mm contexts is cleared
+ */
+void local_flush_tlb_all_mm(void)
+{
+ struct task_struct *p;
An empty line wouldn't hurt here...
+ for_each_process(p)
+ if (p->mm)
+ local_flush_tlb_mm(p->mm);
+}
+
WBR, Sergei
