[PATCH 21/26] x86/oprofile: Enable multiplexing only if the model supports it

[Robert Richter]

This patch checks if the model supports multiplexing. Only then
multiplexing will be enabled. The code is added to the common x86
initialization.

Signed-off-by: Robert Richter <robert.richter@xxxxxxx>
---
 arch/x86/oprofile/nmi_int.c |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index dca7240..f0fb447 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -258,6 +258,12 @@ static int nmi_switch_event(void)
 	return 0;
 }
 
+static inline void mux_init(struct oprofile_operations *ops)
+{
+	if (has_mux())
+		ops->switch_events = nmi_switch_event;
+}
+
 #else
 
 inline int op_x86_phys_to_virt(int phys) { return phys; }
@@ -265,6 +271,7 @@ static inline void nmi_shutdown_mux(void) { }
 static inline int nmi_setup_mux(void) { return 1; }
 static inline void
 nmi_cpu_setup_mux(int cpu, struct op_msrs const * const msrs) { }
+static inline void mux_init(struct oprofile_operations *ops) { }
 
 #endif
 
@@ -682,9 +689,6 @@ int __init op_nmi_init(struct oprofile_operations *ops)
 	ops->start		= nmi_start;
 	ops->stop		= nmi_stop;
 	ops->cpu_type		= cpu_type;
-#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
-	ops->switch_events	= nmi_switch_event;
-#endif
 
 	if (model->init)
 		ret = model->init(ops);
@@ -694,6 +698,8 @@ int __init op_nmi_init(struct oprofile_operations *ops)
 	if (!model->num_virt_counters)
 		model->num_virt_counters = model->num_counters;
 
+	mux_init(ops);
+
 	init_sysfs();
 	using_nmi = 1;
 	printk(KERN_INFO "oprofile: using NMI interrupt.\n");
-- 
1.6.3.3


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/