[bpf-next] samples/bpf: xdpsock: order memory on AArch64

Message ID 20180724133337.20175-1-brian.brooks@linaro.org
State New
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  • [bpf-next] samples/bpf: xdpsock: order memory on AArch64
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Commit Message

Brian Brooks July 24, 2018, 1:33 p.m.
Signed-off-by: Brian Brooks <brian.brooks@linaro.org>

---
 samples/bpf/xdpsock_user.c | 5 +++++
 1 file changed, 5 insertions(+)

-- 
2.18.0

Patch

diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
index 5904b1543831..1e82f7c617c3 100644
--- a/samples/bpf/xdpsock_user.c
+++ b/samples/bpf/xdpsock_user.c
@@ -145,8 +145,13 @@  static void dump_stats(void);
 	} while (0)
 
 #define barrier() __asm__ __volatile__("": : :"memory")
+#ifdef __aarch64__
+#define u_smp_rmb() __asm__ __volatile__("dmb ishld": : :"memory")
+#define u_smp_wmb() __asm__ __volatile__("dmb ishst": : :"memory")
+#else
 #define u_smp_rmb() barrier()
 #define u_smp_wmb() barrier()
+#endif
 #define likely(x) __builtin_expect(!!(x), 1)
 #define unlikely(x) __builtin_expect(!!(x), 0)