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https://github.com/xen-project/xen.git
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Ian Campbell
3bd852f207
No changes required to sparse tree or patches directory. Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
36 lines
1.3 KiB
Diff
36 lines
1.3 KiB
Diff
diff -pruN ../orig-linux-2.6.16.29/include/linux/rcupdate.h ./include/linux/rcupdate.h
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--- ../orig-linux-2.6.16.29/include/linux/rcupdate.h 2006-09-12 19:02:10.000000000 +0100
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+++ ./include/linux/rcupdate.h 2006-09-19 14:05:39.000000000 +0100
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@@ -134,6 +134,7 @@ static inline void rcu_bh_qsctr_inc(int
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}
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extern int rcu_pending(int cpu);
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+extern int rcu_needs_cpu(int cpu);
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/**
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* rcu_read_lock - mark the beginning of an RCU read-side critical section.
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diff -pruN ../orig-linux-2.6.16.29/kernel/rcupdate.c ./kernel/rcupdate.c
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--- ../orig-linux-2.6.16.29/kernel/rcupdate.c 2006-09-12 19:02:10.000000000 +0100
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+++ ./kernel/rcupdate.c 2006-09-19 14:05:39.000000000 +0100
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@@ -485,6 +485,20 @@ int rcu_pending(int cpu)
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__rcu_pending(&rcu_bh_ctrlblk, &per_cpu(rcu_bh_data, cpu));
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}
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+/*
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+ * Check to see if any future RCU-related work will need to be done
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+ * by the current CPU, even if none need be done immediately, returning
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+ * 1 if so. This function is part of the RCU implementation; it is -not-
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+ * an exported member of the RCU API.
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+ */
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+int rcu_needs_cpu(int cpu)
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+{
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+ struct rcu_data *rdp = &per_cpu(rcu_data, cpu);
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+ struct rcu_data *rdp_bh = &per_cpu(rcu_bh_data, cpu);
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+
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+ return (!!rdp->curlist || !!rdp_bh->curlist || rcu_pending(cpu));
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+}
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+
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void rcu_check_callbacks(int cpu, int user)
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{
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if (user ||
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