Merge branch 'percpu-for-linus' into percpu-for-next

Conflicts:
	arch/sparc/kernel/smp_64.c
	arch/x86/kernel/cpu/perf_counter.c
	arch/x86/kernel/setup_percpu.c
	drivers/cpufreq/cpufreq_ondemand.c
	mm/percpu.c

Conflicts in core and arch percpu codes are mostly from commit
ed78e1e078dd44249f88b1dd8c76dafb39567161 which substituted many
num_possible_cpus() with nr_cpu_ids.  As for-next branch has moved all
the first chunk allocators into mm/percpu.c, the changes are moved
from arch code to mm/percpu.c.

Signed-off-by: Tejun Heo <tj@kernel.org>

6 files changed, 27 insertions, 15 deletions

diff --git a/arch/s390/kernel/dis.c b/arch/s390/kernel/dis.c
index d2f270c995d9..db943a7ec513 100644
--- a/arch/s390/kernel/dis.c
+++ b/arch/s390/kernel/dis.c
@@ -15,7 +15,6 @@
 #include <linux/timer.h>
 #include <linux/mm.h>
 #include <linux/smp.h>
-#include <linux/smp_lock.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index f9b144049dc9..cae14c499511 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -208,9 +208,12 @@ static noinline __init void detect_machine_type(void)
 		machine_flags |= MACHINE_FLAG_KVM;
 	else
 		machine_flags |= MACHINE_FLAG_VM;
+
+	/* Store machine flags for setting up lowcore early */
+	S390_lowcore.machine_flags = machine_flags;
 }
 
-static void early_pgm_check_handler(void)
+static __init void early_pgm_check_handler(void)
 {
 	unsigned long addr;
 	const struct exception_table_entry *fixup;
@@ -222,7 +225,7 @@ static void early_pgm_check_handler(void)
 	S390_lowcore.program_old_psw.addr = fixup->fixup | PSW_ADDR_AMODE;
 }
 
-void setup_lowcore_early(void)
+static noinline __init void setup_lowcore_early(void)
 {
 	psw_t psw;
 
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index b8bf4b140065..371a2d88f4ac 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -70,6 +70,7 @@ struct shutdown_action {
 	char *name;
 	void (*fn) (struct shutdown_trigger *trigger);
 	int (*init) (void);
+	int init_rc;
 };
 
 static char *ipl_type_str(enum ipl_type type)
@@ -1486,11 +1487,13 @@ static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
 	int i;
 
 	for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
-		if (!shutdown_actions_list[i])
-			continue;
 		if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
-			trigger->action = shutdown_actions_list[i];
-			return len;
+			if (shutdown_actions_list[i]->init_rc) {
+				return shutdown_actions_list[i]->init_rc;
+			} else {
+				trigger->action = shutdown_actions_list[i];
+				return len;
+			}
 		}
 	}
 	return -EINVAL;
@@ -1640,8 +1643,8 @@ static void __init shutdown_actions_init(void)
 	for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
 		if (!shutdown_actions_list[i]->init)
 			continue;
-		if (shutdown_actions_list[i]->init())
-			shutdown_actions_list[i] = NULL;
+		shutdown_actions_list[i]->init_rc =
+			shutdown_actions_list[i]->init();
 	}
 }
 
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 490b39934d65..43acd73105b7 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -26,7 +26,6 @@
 #include <linux/sched.h>
 #include <linux/mm.h>
 #include <linux/smp.h>
-#include <linux/smp_lock.h>
 #include <linux/errno.h>
 #include <linux/ptrace.h>
 #include <linux/user.h>
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 2270730f5354..be2cae083406 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -687,13 +687,14 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 #ifndef CONFIG_64BIT
 	if (MACHINE_HAS_IEEE)
 		lowcore->extended_save_area_addr = (u32) save_area;
-#else
-	if (vdso_alloc_per_cpu(smp_processor_id(), lowcore))
-		BUG();
 #endif
 	set_prefix((u32)(unsigned long) lowcore);
 	local_mcck_enable();
 	local_irq_enable();
+#ifdef CONFIG_64BIT
+	if (vdso_alloc_per_cpu(smp_processor_id(), &S390_lowcore))
+		BUG();
+#endif
 	for_each_possible_cpu(cpu)
 		if (cpu != smp_processor_id())
 			smp_create_idle(cpu);
diff --git a/arch/s390/kernel/vdso64/clock_gettime.S b/arch/s390/kernel/vdso64/clock_gettime.S
index 79dbfee831ec..49106c6e6f88 100644
--- a/arch/s390/kernel/vdso64/clock_gettime.S
+++ b/arch/s390/kernel/vdso64/clock_gettime.S
@@ -88,10 +88,17 @@ __kernel_clock_gettime:
 	llilh	%r4,0x0100
 	sar	%a4,%r4
 	lghi	%r4,0
+	epsw	%r5,0
 	sacf	512				/* Magic ectg instruction */
 	.insn	ssf,0xc80100000000,__VDSO_ECTG_BASE(4),__VDSO_ECTG_USER(4),4
-	sacf	0
-	sar	%a4,%r2
+	tml	%r5,0x4000
+	jo	11f
+	tml	%r5,0x8000
+	jno	10f
+	sacf	256
+	j	11f
+10:	sacf	0
+11:	sar	%a4,%r2
 	algr	%r1,%r0				/* r1 = cputime as TOD value */
 	mghi	%r1,1000			/* convert to nanoseconds */
 	srlg	%r1,%r1,12			/* r1 = cputime in nanosec */