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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2012-09-06 14:42:13 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-09-26 15:45:12 +0200 |
| commit | caf757c609445b01ad845df160369d8ccfd97d5b (patch) | |
| tree | ea281a82383c15ed92ec64e88c4b1b55462d9c6e /arch/s390/kernel/early.c | |
| parent | s390/3270: drop unused spinlock from struct con3270 (diff) | |
| download | linux-caf757c609445b01ad845df160369d8ccfd97d5b.tar.xz linux-caf757c609445b01ad845df160369d8ccfd97d5b.zip | |
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>
Diffstat (limited to 'arch/s390/kernel/early.c')
| -rw-r--r-- | arch/s390/kernel/early.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index e8000d5ff533..7f4717675c19 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -222,12 +222,12 @@ static noinline __init void detect_machine_type(void) struct sysinfo_3_2_2 *vmms = (struct sysinfo_3_2_2 *)&sysinfo_page; /* Check current-configuration-level */ - if ((stsi(NULL, 0, 0, 0) >> 28) <= 2) { + if (stsi(NULL, 0, 0, 0) <= 2) { S390_lowcore.machine_flags |= MACHINE_FLAG_LPAR; return; } /* Get virtual-machine cpu information. */ - if (stsi(vmms, 3, 2, 2) == -ENOSYS || !vmms->count) + if (stsi(vmms, 3, 2, 2) || !vmms->count) return; /* Running under KVM? If not we assume z/VM */ @@ -246,7 +246,7 @@ static __init void setup_topology(void) return; S390_lowcore.machine_flags |= MACHINE_FLAG_TOPOLOGY; for (max_mnest = 6; max_mnest > 1; max_mnest--) { - if (stsi(&sysinfo_page, 15, 1, max_mnest) != -ENOSYS) + if (stsi(&sysinfo_page, 15, 1, max_mnest) == 0) break; } topology_max_mnest = max_mnest; |