Commit "mm: send one IPI per CPU to TLB flush all entries after unmapping
pages" added a trace_tlb_flush() while preemption was still enabled. This
means that we'll access smp_processor_id() which in turn will get us quite
a few warnings.
Fix it by moving the trace to where the preemption is disabled, one line
down.
Signed-off-by: Sasha Levin <sasha.le...@oracle.com>
---
The diff is all lies: I've moved trace_tlb_flush() one line down rather
than get_cpu() a line up ;)
mm/rmap.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/mm/rmap.c b/mm/rmap.c
index 30812e9..63ba46c 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -613,9 +613,10 @@ void try_to_unmap_flush(void)
if (!tlb_ubc->flush_required)
return;
+ cpu = get_cpu();
+
trace_tlb_flush(TLB_REMOTE_SHOOTDOWN, -1UL);
- cpu = get_cpu();
if (cpumask_test_cpu(cpu, &tlb_ubc->cpumask))
percpu_flush_tlb_batch_pages(&tlb_ubc->cpumask);
--
1.7.10.4
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