sparc64: tracehook syscall

This changes sparc64 syscall tracing to use the new tracehook.h entry
points.

[ Add assembly changes to force an immediate -ENOSYS return from
  the system call when syscall_trace() returns non-zero at syscall
  entry.  -DaveM ]

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/syscalls.S b/arch/sparc64/kernel/syscalls.S
index db19ed67acf6..a2f24270ed8a 100644
--- a/arch/sparc64/kernel/syscalls.S
+++ b/arch/sparc64/kernel/syscalls.S
@@ -162,6 +162,8 @@ linux_syscall_trace32:
         add     %sp, PTREGS_OFF, %o0
         call    syscall_trace
          clr    %o1
+        brnz,pn %o0, 3f
+         mov    -ENOSYS, %o0
         srl     %i0, 0, %o0
         srl     %i4, 0, %o4
         srl     %i1, 0, %o1
@@ -173,6 +175,8 @@ linux_syscall_trace:
         add     %sp, PTREGS_OFF, %o0
         call    syscall_trace
          clr    %o1
+        brnz,pn %o0, 3f
+         mov    -ENOSYS, %o0
         mov     %i0, %o0
         mov     %i1, %o1
         mov     %i2, %o2