libbpf: Fix arm64 build

The macro for libbpf_smp_store_release() doesn't build on arm64, fix it.

Fixes: 291471dd1559 ("libbpf, xsk: Add libbpf_smp_store_release libbpf_smp_load_acquire")
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210308182521.155536-1-jean-philippe@linaro.org

diff --git a/tools/lib/bpf/libbpf_util.h b/tools/lib/bpf/libbpf_util.h
index 94a0d7bb6f3c533298041ffceed0ab935edbe190..cfbcfc063c81c96c558e9626b030d23dcc32601e 100644 (file)
--- a/tools/lib/bpf/libbpf_util.h
+++ b/tools/lib/bpf/libbpf_util.h
@@ -35,7 +35,7 @@ extern "C" {
                typeof(*p) ___p1;                                       \
                asm volatile ("ldar %w0, %1"                            \
                              : "=r" (___p1) : "Q" (*p) : "memory");    \
-               __p1;                                                   \
+               ___p1;                                                  \
        })
 #elif defined(__riscv)
 # define libbpf_smp_store_release(p, v)                                        \