[PATCH bpf-next] samples: bpf: Add macro SYSCALL() for aarch64

[Rong Tao <rtoax@xxxxxxxxxxx>]

From: Rong Tao <rongtao@xxxxxxxx>

kernel arm64/kernel/sys.c macro __SYSCALL() adds a prefix __arm64_, we
should support it for aarch64. The following is the output of the bpftrace
script:

    $ sudo bpftrace -l | grep sys_write
    ...
    kprobe:__arm64_sys_write
    kprobe:__arm64_sys_writev
    ...

Signed-off-by: Rong Tao <rongtao@xxxxxxxx>
---
 samples/bpf/trace_common.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/samples/bpf/trace_common.h b/samples/bpf/trace_common.h
index 8cb5400aed1f..fafc699af0a3 100644
--- a/samples/bpf/trace_common.h
+++ b/samples/bpf/trace_common.h
@@ -6,6 +6,8 @@
 #define SYSCALL(SYS) "__x64_" __stringify(SYS)
 #elif defined(__s390x__)
 #define SYSCALL(SYS) "__s390x_" __stringify(SYS)
+#elif defined(__aarch64__)
+#define SYSCALL(SYS) "__arm64_" __stringify(SYS)
 #else
 #define SYSCALL(SYS)  __stringify(SYS)
 #endif
-- 
2.39.1