Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (121 commits)
  perf symbols: Increase symbol KSYM_NAME_LEN size
  perf hists browser: Refuse 'a' hotkey on non symbolic views
  perf ui browser: Use libslang to read keys
  perf tools: Fix tracing info recording
  perf hists browser: Elide DSO column when it is set to just one DSO, ditto for threads
  perf hists: Don't consider filtered entries when calculating column widths
  perf hists: Don't decay total_period for filtered entries
  perf hists browser: Honour symbol_conf.show_{nr_samples,total_period}
  perf hists browser: Do not exit on tab key with single event
  perf annotate browser: Don't change selection line when returning from callq
  perf tools: handle endianness of feature bitmap
  perf tools: Add prelink suggestion to dso update message
  perf script: Fix unknown feature comment
  perf hists browser: Apply the dso and thread filters when merging new batches
  perf hists: Move the dso and thread filters from hist_browser
  perf ui browser: Honour the xterm colors
  perf top tui: Give color hints just on the percentage, like on --stdio
  perf ui browser: Make the colors configurable and change the defaults
  perf tui: Remove unneeded call to newtCls on startup
  perf hists: Don't format the percentage on hist_entry__snprintf
  ...

Fix up conflicts in arch/x86/kernel/kprobes.c manually.

Ingo's tree did the insane "add volatile to const array", which just
doesn't make sense ("volatile const"?).  But we could remove the const
*and* make the array volatile to make doubly sure that gcc doesn't
optimize it away..

Also fix up kernel/trace/ring_buffer.c non-data-conflicts manually: the
reader_lock has been turned into a raw lock by the core locking merge,
and there was a new user of it introduced in this perf core merge.  Make
sure that new use also uses the raw accessor functions.

3 files changed, 26 insertions, 54 deletions

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 0784f99a4665..b8e08cb67a18 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -50,6 +50,7 @@
 #include <acpi/hed.h>
 #include <asm/mce.h>
 #include <asm/tlbflush.h>
+#include <asm/nmi.h>
 
 #include "apei-internal.h"
 
@@ -749,15 +750,11 @@ static void ghes_proc_in_irq(struct irq_work *irq_work)
 	}
 }
 
-static int ghes_notify_nmi(struct notifier_block *this,
-				  unsigned long cmd, void *data)
+static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs)
 {
 	struct ghes *ghes, *ghes_global = NULL;
 	int sev, sev_global = -1;
-	int ret = NOTIFY_DONE;
-
-	if (cmd != DIE_NMI)
-		return ret;
+	int ret = NMI_DONE;
 
 	raw_spin_lock(&ghes_nmi_lock);
 	list_for_each_entry_rcu(ghes, &ghes_nmi, list) {
@@ -770,10 +767,10 @@ static int ghes_notify_nmi(struct notifier_block *this,
 			sev_global = sev;
 			ghes_global = ghes;
 		}
-		ret = NOTIFY_STOP;
+		ret = NMI_HANDLED;
 	}
 
-	if (ret == NOTIFY_DONE)
+	if (ret == NMI_DONE)
 		goto out;
 
 	if (sev_global >= GHES_SEV_PANIC) {
@@ -825,10 +822,6 @@ static struct notifier_block ghes_notifier_sci = {
 	.notifier_call = ghes_notify_sci,
 };
 
-static struct notifier_block ghes_notifier_nmi = {
-	.notifier_call = ghes_notify_nmi,
-};
-
 static unsigned long ghes_esource_prealloc_size(
 	const struct acpi_hest_generic *generic)
 {
@@ -918,7 +911,8 @@ static int __devinit ghes_probe(struct platform_device *ghes_dev)
 		ghes_estatus_pool_expand(len);
 		mutex_lock(&ghes_list_mutex);
 		if (list_empty(&ghes_nmi))
-			register_die_notifier(&ghes_notifier_nmi);
+			register_nmi_handler(NMI_LOCAL, ghes_notify_nmi, 0,
+						"ghes");
 		list_add_rcu(&ghes->list, &ghes_nmi);
 		mutex_unlock(&ghes_list_mutex);
 		break;
@@ -964,7 +958,7 @@ static int __devexit ghes_remove(struct platform_device *ghes_dev)
 		mutex_lock(&ghes_list_mutex);
 		list_del_rcu(&ghes->list);
 		if (list_empty(&ghes_nmi))
-			unregister_die_notifier(&ghes_notifier_nmi);
+			unregister_nmi_handler(NMI_LOCAL, "ghes");
 		mutex_unlock(&ghes_list_mutex);
 		/*
 		 * To synchronize with NMI handler, ghes can only be
diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c
index 3302586655c4..c2917ffad2c2 100644
--- a/drivers/char/ipmi/ipmi_watchdog.c
+++ b/drivers/char/ipmi/ipmi_watchdog.c
@@ -65,6 +65,7 @@
  * mechanism for it at that time.
  */
 #include <asm/kdebug.h>
+#include <asm/nmi.h>
 #define HAVE_DIE_NMI
 #endif
 
@@ -1077,17 +1078,8 @@ static void ipmi_unregister_watchdog(int ipmi_intf)
 
 #ifdef HAVE_DIE_NMI
 static int
-ipmi_nmi(struct notifier_block *self, unsigned long val, void *data)
+ipmi_nmi(unsigned int val, struct pt_regs *regs)
 {
-	struct die_args *args = data;
-
-	if (val != DIE_NMIUNKNOWN)
-		return NOTIFY_OK;
-
-	/* Hack, if it's a memory or I/O error, ignore it. */
-	if (args->err & 0xc0)
-		return NOTIFY_OK;
-
 	/*
 	 * If we get here, it's an NMI that's not a memory or I/O
 	 * error.  We can't truly tell if it's from IPMI or not
@@ -1097,15 +1089,15 @@ ipmi_nmi(struct notifier_block *self, unsigned long val, void *data)
 
 	if (testing_nmi) {
 		testing_nmi = 2;
-		return NOTIFY_STOP;
+		return NMI_HANDLED;
 	}
 
 	/* If we are not expecting a timeout, ignore it. */
 	if (ipmi_watchdog_state == WDOG_TIMEOUT_NONE)
-		return NOTIFY_OK;
+		return NMI_DONE;
 
 	if (preaction_val != WDOG_PRETIMEOUT_NMI)
-		return NOTIFY_OK;
+		return NMI_DONE;
 
 	/*
 	 * If no one else handled the NMI, we assume it was the IPMI
@@ -1120,12 +1112,8 @@ ipmi_nmi(struct notifier_block *self, unsigned long val, void *data)
 			panic(PFX "pre-timeout");
 	}
 
-	return NOTIFY_STOP;
+	return NMI_HANDLED;
 }
-
-static struct notifier_block ipmi_nmi_handler = {
-	.notifier_call = ipmi_nmi
-};
 #endif
 
 static int wdog_reboot_handler(struct notifier_block *this,
@@ -1290,7 +1278,8 @@ static void check_parms(void)
 		}
 	}
 	if (do_nmi && !nmi_handler_registered) {
-		rv = register_die_notifier(&ipmi_nmi_handler);
+		rv = register_nmi_handler(NMI_UNKNOWN, ipmi_nmi, 0,
+						"ipmi");
 		if (rv) {
 			printk(KERN_WARNING PFX
 			       "Can't register nmi handler\n");
@@ -1298,7 +1287,7 @@ static void check_parms(void)
 		} else
 			nmi_handler_registered = 1;
 	} else if (!do_nmi && nmi_handler_registered) {
-		unregister_die_notifier(&ipmi_nmi_handler);
+		unregister_nmi_handler(NMI_UNKNOWN, "ipmi");
 		nmi_handler_registered = 0;
 	}
 #endif
@@ -1336,7 +1325,7 @@ static int __init ipmi_wdog_init(void)
 	if (rv) {
 #ifdef HAVE_DIE_NMI
 		if (nmi_handler_registered)
-			unregister_die_notifier(&ipmi_nmi_handler);
+			unregister_nmi_handler(NMI_UNKNOWN, "ipmi");
 #endif
 		atomic_notifier_chain_unregister(&panic_notifier_list,
 						 &wdog_panic_notifier);
@@ -1357,7 +1346,7 @@ static void __exit ipmi_wdog_exit(void)
 
 #ifdef HAVE_DIE_NMI
 	if (nmi_handler_registered)
-		unregister_die_notifier(&ipmi_nmi_handler);
+		unregister_nmi_handler(NMI_UNKNOWN, "ipmi");
 #endif
 
 	atomic_notifier_chain_unregister(&panic_notifier_list,
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index 809cbda03d7a..3774c9b8dac9 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -35,6 +35,7 @@
 #include <linux/notifier.h>
 #include <asm/cacheflush.h>
 #endif /* CONFIG_HPWDT_NMI_DECODING */
+#include <asm/nmi.h>
 
 #define HPWDT_VERSION			"1.3.0"
 #define SECS_TO_TICKS(secs)		((secs) * 1000 / 128)
@@ -477,15 +478,11 @@ static int hpwdt_time_left(void)
 /*
  *	NMI Handler
  */
-static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,
-				void *data)
+static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs)
 {
 	unsigned long rom_pl;
 	static int die_nmi_called;
 
-	if (ulReason != DIE_NMIUNKNOWN)
-		goto out;
-
 	if (!hpwdt_nmi_decoding)
 		goto out;
 
@@ -508,7 +505,7 @@ static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,
 		"Management Log for details.\n");
 
 out:
-	return NOTIFY_OK;
+	return NMI_DONE;
 }
 #endif /* CONFIG_HPWDT_NMI_DECODING */
 
@@ -648,13 +645,6 @@ static struct miscdevice hpwdt_miscdev = {
 	.fops = &hpwdt_fops,
 };
 
-#ifdef CONFIG_HPWDT_NMI_DECODING
-static struct notifier_block die_notifier = {
-	.notifier_call = hpwdt_pretimeout,
-	.priority = 0,
-};
-#endif /* CONFIG_HPWDT_NMI_DECODING */
-
 /*
  *	Init & Exit
  */
@@ -740,10 +730,9 @@ static int __devinit hpwdt_init_nmi_decoding(struct pci_dev *dev)
 	 * die notify list to handle a critical NMI. The default is to
 	 * be last so other users of the NMI signal can function.
 	 */
-	if (priority)
-		die_notifier.priority = 0x7FFFFFFF;
-
-	retval = register_die_notifier(&die_notifier);
+	retval = register_nmi_handler(NMI_UNKNOWN, hpwdt_pretimeout,
+					(priority) ? NMI_FLAG_FIRST : 0,
+					"hpwdt");
 	if (retval != 0) {
 		dev_warn(&dev->dev,
 			"Unable to register a die notifier (err=%d).\n",
@@ -763,7 +752,7 @@ static int __devinit hpwdt_init_nmi_decoding(struct pci_dev *dev)
 
 static void hpwdt_exit_nmi_decoding(void)
 {
-	unregister_die_notifier(&die_notifier);
+	unregister_nmi_handler(NMI_UNKNOWN, "hpwdt");
 	if (cru_rom_addr)
 		iounmap(cru_rom_addr);
 }