Update from upstream with manual merge of Yasunori Goto's

changes to swiotlb.c made in commit 281dd25cdc0d6903929b79183816d151ea626341
since this file has been moved from arch/ia64/lib/swiotlb.c to
lib/swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index b15826f6e3a2..9bdba8169b41 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -392,4 +392,14 @@ extern cpumask_t cpu_present_map;
 #define for_each_online_cpu(cpu)  for_each_cpu_mask((cpu), cpu_online_map)
 #define for_each_present_cpu(cpu) for_each_cpu_mask((cpu), cpu_present_map)
 
+/* Find the highest possible smp_processor_id() */
+#define highest_possible_processor_id() \
+({ \
+        unsigned int cpu, highest = 0; \
+        for_each_cpu_mask(cpu, cpu_possible_map) \
+                highest = cpu; \
+        highest; \
+})
+
+
 #endif /* __LINUX_CPUMASK_H */