s390/sysinfo,stsi: change return code handling

Change return code handling of the stsi() function:

In case function code 0 was specified the return value is the
current configuration level (already shifted). That way all
the code that actually copied the stsi_0() function can go
away.

Otherwise the return value is 0 (success) or negative to
indicate an error (currently only -EOPNOTSUPP).

Also stsi() is no longer an inline function. The function is
not performance critical, but every caller would generate an
exception table entry for this function.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 1 insertions, 15 deletions

diff --git a/arch/s390/include/asm/sysinfo.h b/arch/s390/include/asm/sysinfo.h
index 04e6e977470..f92428e459f 100644
--- a/arch/s390/include/asm/sysinfo.h
+++ b/arch/s390/include/asm/sysinfo.h
@@ -153,21 +153,7 @@ struct sysinfo_15_1_x {
         union topology_entry tle[0];
 };
 
-static inline int stsi(void *sysinfo, int fc, int sel1, int sel2)
-{
-        register int r0 asm("0") = (fc << 28) | sel1;
-        register int r1 asm("1") = sel2;
-
-        asm volatile(
-                "   stsi 0(%2)\n"
-                "0: jz   2f\n"
-                "1: lhi  %0,%3\n"
-                "2:\n"
-                EX_TABLE(0b, 1b)
-                : "+d" (r0) : "d" (r1), "a" (sysinfo), "K" (-ENOSYS)
-                : "cc", "memory");
-        return r0;
-}
+int stsi(void *sysinfo, int fc, int sel1, int sel2);
 
 /*
  * Service level reporting interface.