[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, 14 insertions, 4 deletions

diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index 3ce3a2d56fa8..41c05dcd68f4 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -182,8 +182,14 @@ static unsigned int h_get_ppp(unsigned long *entitled,
                               unsigned long *resource)
 {
         unsigned long rc;
-        rc = plpar_hcall_4out(H_GET_PPP, 0, 0, 0, 0, entitled, unallocated,
-                              aggregation, resource);
+        unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+        rc = plpar_hcall(H_GET_PPP, retbuf);
+
+        *entitled = retbuf[0];
+        *unallocated = retbuf[1];
+        *aggregation = retbuf[2];
+        *resource = retbuf[3];
 
         log_plpar_hcall_return(rc, "H_GET_PPP");
 
@@ -193,8 +199,12 @@ static unsigned int h_get_ppp(unsigned long *entitled,
 static void h_pic(unsigned long *pool_idle_time, unsigned long *num_procs)
 {
         unsigned long rc;
-        unsigned long dummy;
-        rc = plpar_hcall(H_PIC, 0, 0, 0, 0, pool_idle_time, num_procs, &dummy);
+        unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+        rc = plpar_hcall(H_PIC, retbuf);
+
+        *pool_idle_time = retbuf[0];
+        *num_procs = retbuf[1];
 
         if (rc != H_AUTHORITY)
                 log_plpar_hcall_return(rc, "H_PIC");