[PATCH] target/riscv: Add missing include guard in pmu.h

[frank . chang]

From: Frank Chang <frank.ch...@sifive.com>

Add missing include guard in pmu.h to avoid the problem of double
inclusion.

Signed-off-by: Frank Chang <frank.ch...@sifive.com>
---
 target/riscv/pmu.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/target/riscv/pmu.h b/target/riscv/pmu.h
index 505fc850d3..7c0ad661e0 100644
--- a/target/riscv/pmu.h
+++ b/target/riscv/pmu.h
@@ -16,6 +16,9 @@
  * this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#ifndef RISCV_PMU_H
+#define RISCV_PMU_H
+
 #include "cpu.h"
 #include "qapi/error.h"
 
@@ -31,3 +34,5 @@ int riscv_pmu_incr_ctr(RISCVCPU *cpu, enum 
riscv_pmu_event_idx event_idx);
 void riscv_pmu_generate_fdt_node(void *fdt, uint32_t cmask, char *pmu_name);
 int riscv_pmu_setup_timer(CPURISCVState *env, uint64_t value,
                           uint32_t ctr_idx);
+
+#endif /* RISCV_PMU_H */
-- 
2.43.0