From 83119ad4a1ceacd99f380086c2855ae2c4268afc Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Tue, 10 Jul 2007 11:24:10 +0200 Subject: [S390] sclp: Test facility list before executing a service call. Check if a command is available before executing. Saves some superfluous service calls that won't succeed anyway. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- drivers/s390/char/sclp_info.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/s390/char/sclp_info.c') diff --git a/drivers/s390/char/sclp_info.c b/drivers/s390/char/sclp_info.c index 7d21dbb..a1136e0 100644 --- a/drivers/s390/char/sclp_info.c +++ b/drivers/s390/char/sclp_info.c @@ -30,6 +30,8 @@ struct sclp_readinfo_sccb { static struct sclp_readinfo_sccb __initdata early_readinfo_sccb; static int __initdata early_readinfo_sccb_valid; +u64 sclp_facilities; + void __init sclp_readinfo_early(void) { int ret; @@ -70,6 +72,13 @@ void __init sclp_readinfo_early(void) __ctl_clear_bit(0, 9); } +void __init sclp_facilities_detect(void) +{ + if (!early_readinfo_sccb_valid) + return; + sclp_facilities = early_readinfo_sccb.facilities; +} + unsigned long long __init sclp_memory_detect(void) { unsigned long long memsize; -- cgit v1.1