Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 14 insertions, 39 deletions

diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index 47b168fb29c..bdad47d5447 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -14,11 +14,11 @@
 #include <linux/delay.h>
 #include <linux/reboot.h>
 #include <linux/ftrace.h>
+#include <linux/debug_locks.h>
 #include <asm/cio.h>
 #include <asm/setup.h>
 #include <asm/pgtable.h>
 #include <asm/pgalloc.h>
-#include <asm/system.h>
 #include <asm/smp.h>
 #include <asm/reset.h>
 #include <asm/ipl.h>
@@ -49,50 +49,21 @@ static void add_elf_notes(int cpu)
 }
 
 /*
- * Store status of next available physical CPU
- */
-static int store_status_next(int start_cpu, int this_cpu)
-{
-	struct save_area *sa = (void *) 4608 + store_prefix();
-	int cpu, rc;
-
-	for (cpu = start_cpu; cpu < 65536; cpu++) {
-		if (cpu == this_cpu)
-			continue;
-		do {
-			rc = raw_sigp(cpu, sigp_stop_and_store_status);
-		} while (rc == sigp_busy);
-		if (rc != sigp_order_code_accepted)
-			continue;
-		if (sa->pref_reg)
-			return cpu;
-	}
-	return -1;
-}
-
-/*
  * Initialize CPU ELF notes
  */
 void setup_regs(void)
 {
 	unsigned long sa = S390_lowcore.prefixreg_save_area + SAVE_AREA_BASE;
-	int cpu, this_cpu, phys_cpu = 0, first = 1;
+	int cpu, this_cpu;
 
-	this_cpu = stap();
-
-	if (!S390_lowcore.prefixreg_save_area)
-		first = 0;
+	this_cpu = smp_find_processor_id(stap());
+	add_elf_notes(this_cpu);
 	for_each_online_cpu(cpu) {
-		if (first) {
-			add_elf_notes(cpu);
-			first = 0;
+		if (cpu == this_cpu)
+			continue;
+		if (smp_store_status(cpu))
 			continue;
-		}
-		phys_cpu = store_status_next(phys_cpu, this_cpu);
-		if (phys_cpu == -1)
-			break;
 		add_elf_notes(cpu);
-		phys_cpu++;
 	}
 	/* Copy dump CPU store status info to absolute zero */
 	memcpy((void *) SAVE_AREA_BASE, (void *) sa, sizeof(struct save_area));
@@ -238,10 +209,14 @@ static void __machine_kexec(void *data)
 	struct kimage *image = data;
 
 	pfault_fini();
-	if (image->type == KEXEC_TYPE_CRASH)
+	tracing_off();
+	debug_locks_off();
+	if (image->type == KEXEC_TYPE_CRASH) {
+		lgr_info_log();
 		s390_reset_system(__do_machine_kdump, data);
-	else
+	} else {
 		s390_reset_system(__do_machine_kexec, data);
+	}
 	disabled_wait((unsigned long) __builtin_return_address(0));
 }
 
@@ -255,5 +230,5 @@ void machine_kexec(struct kimage *image)
 		return;
 	tracer_disable();
 	smp_send_stop();
-	smp_switch_to_ipl_cpu(__machine_kexec, image);
+	smp_call_ipl_cpu(__machine_kexec, image);
 }