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>
diff --git a/arch/s390/include/asm/sysinfo.h b/arch/s390/include/asm/sysinfo.h
index 04e6e977..f92428e 100644
--- a/arch/s390/include/asm/sysinfo.h
+++ b/arch/s390/include/asm/sysinfo.h
@@ -153,21 +153,7 @@
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.