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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2012-03-11 11:59:26 -0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-03-11 11:59:28 -0400
commit8b646bd759086f6090fe27acf414c0b5faa737f4 (patch)
tree29475659031c57ccf2ca43899614ab5c6b1899a0 /drivers/s390
parent7e180bd8020d213bb0de15c3606968f8a9262439 (diff)
downloadlinux-8b646bd759086f6090fe27acf414c0b5faa737f4.tar.bz2
[S390] rework smp code
Define struct pcpu and merge some of the NR_CPUS arrays into it, including __cpu_logical_map, current_set and smp_cpu_state. Split smp related functions to those operating on physical cpus and the functions operating on a logical cpu number. Make the functions for physical cpus use a pointer to a struct pcpu. This hides the knowledge about cpu addresses in smp.c, entry[64].S and swsusp_asm64.S, thus remove the sigp.h header. The PSW restart mechanism is used to start secondary cpus, calling a function on an online cpu, calling a function on the ipl cpu, and for the nmi signal. Replace the different assembler functions with a single function restart_int_handler. The new entry point calls a function whose pointer is stored in the lowcore of the target cpu and it can wait for the source cpu to stop. This covers all existing use cases. Overall the code is now simpler and there are ~380 lines less code. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/char/sclp_quiesce.c1
-rw-r--r--drivers/s390/char/zcore.c1
2 files changed, 0 insertions, 2 deletions
diff --git a/drivers/s390/char/sclp_quiesce.c b/drivers/s390/char/sclp_quiesce.c
index 87fc0ac11e67..69df137310bc 100644
--- a/drivers/s390/char/sclp_quiesce.c
+++ b/drivers/s390/char/sclp_quiesce.c
@@ -15,7 +15,6 @@
#include <linux/reboot.h>
#include <linux/atomic.h>
#include <asm/ptrace.h>
-#include <asm/sigp.h>
#include <asm/smp.h>
#include "sclp.h"
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index 1b6d9247fdc7..3303d66b2794 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -21,7 +21,6 @@
#include <asm/ipl.h>
#include <asm/sclp.h>
#include <asm/setup.h>
-#include <asm/sigp.h>
#include <asm/uaccess.h>
#include <asm/debug.h>
#include <asm/processor.h>