The hcall macros may call out to c code for tracing, so we need
to set up a valid r2. This fixes an oops found when testing
ibmvscsi as a module.

Signed-off-by: Anton Blanchard <an...@samba.org>
---

diff --git a/arch/powerpc/platforms/pseries/hvCall.S 
b/arch/powerpc/platforms/pseries/hvCall.S
index 7891a86..99ecf0a 100644
--- a/arch/powerpc/platforms/pseries/hvCall.S
+++ b/arch/powerpc/platforms/pseries/hvCall.S
@@ -106,7 +106,7 @@ END_FTR_SECTION(0, 1);                                      
        \
 
        .text
 
-_GLOBAL(plpar_hcall_norets)
+_GLOBAL_TOC(plpar_hcall_norets)
        HMT_MEDIUM
 
        mfcr    r0
@@ -122,7 +122,7 @@ _GLOBAL(plpar_hcall_norets)
        mtcrf   0xff,r0
        blr                             /* return r3 = status */
 
-_GLOBAL(plpar_hcall)
+_GLOBAL_TOC(plpar_hcall)
        HMT_MEDIUM
 
        mfcr    r0
@@ -188,7 +188,7 @@ _GLOBAL(plpar_hcall_raw)
 
        blr                             /* return r3 = status */
 
-_GLOBAL(plpar_hcall9)
+_GLOBAL_TOC(plpar_hcall9)
        HMT_MEDIUM
 
        mfcr    r0
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