[POWERPC] clean up pseries hcall interfaces

Our pseries hcall interfaces are out of control:

	plpar_hcall_norets
	plpar_hcall
	plpar_hcall_8arg_2ret
	plpar_hcall_4out
	plpar_hcall_7arg_7ret
	plpar_hcall_9arg_9ret

Create 3 interfaces to cover all cases:

	plpar_hcall_norets:	7 arguments no returns
	plpar_hcall:		6 arguments 4 returns
	plpar_hcall9:		9 arguments 9 returns

There are only 2 cases in the kernel that need plpar_hcall9, hopefully
we can keep it that way.

Pass in a buffer to stash return parameters so we avoid the &dummy1,
&dummy2 madness.

Signed-off-by: Anton Blanchard <anton@samba.org>
--
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 5 insertions, 6 deletions

diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 10e10be324c9..14353b8789dd 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -668,15 +668,14 @@ static int rtas_ibm_suspend_me(struct rtas_args *args)
         int i;
         long state;
         long rc;
-        unsigned long dummy;
-
+        unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
         struct rtas_suspend_me_data data;
 
         /* Make sure the state is valid */
-        rc = plpar_hcall(H_VASI_STATE,
-                         ((u64)args->args[0] << 32) | args->args[1],
-                         0, 0, 0,
-                         &state, &dummy, &dummy);
+        rc = plpar_hcall(H_VASI_STATE, retbuf,
+                         ((u64)args->args[0] << 32) | args->args[1]);
+
+        state = retbuf[0];
 
         if (rc) {
                 printk(KERN_ERR "rtas_ibm_suspend_me: vasi_state returned %ld\n",rc);