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authorFrederic Weisbecker <fweisbec@gmail.com>2008-12-09 23:54:20 +0100
committerIngo Molnar <mingo@elte.hu>2008-12-12 11:14:08 +0100
commitbcbc4f20b52c2c40c43a4d2337707dcdfe81bc3a (patch)
tree897774cc2f53691b2736e3d1dbadc9d1e263d47a /arch
parenta0343e823184070f55364d8359f832dcb33c57c7 (diff)
tracing/function-graph-tracer: annotate do_IRQ and smp_apic_timer_interrupt
Impact: move most important x86 irq entry-points to a separate subsection Annotate do_IRQ and smp_apic_timer_interrupt to put them into the .irqentry.text subsection. These function will so be recognized as hardirq entrypoints for the function-graph-tracer. We could also annotate other irq entries but the others are far less important but they can be added on request. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/apic.c3
-rw-r--r--arch/x86/kernel/irq_64.c3
2 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index 16f94879b52..b946ac19753 100644
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -30,6 +30,7 @@
#include <linux/module.h>
#include <linux/dmi.h>
#include <linux/dmar.h>
+#include <linux/ftrace.h>
#include <asm/atomic.h>
#include <asm/smp.h>
@@ -800,7 +801,7 @@ static void local_apic_timer_interrupt(void)
* [ if a single-CPU system runs an SMP kernel then we call the local
* interrupt as well. Thus we cannot inline the local irq ... ]
*/
-void smp_apic_timer_interrupt(struct pt_regs *regs)
+void __irq_entry smp_apic_timer_interrupt(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index 60eb84eb77a..11c65e811ff 100644
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -13,6 +13,7 @@
#include <linux/seq_file.h>
#include <linux/module.h>
#include <linux/delay.h>
+#include <linux/ftrace.h>
#include <asm/uaccess.h>
#include <asm/io_apic.h>
#include <asm/idle.h>
@@ -47,7 +48,7 @@ static inline void stack_overflow_check(struct pt_regs *regs)
* SMP cross-CPU interrupts have their own specific
* handlers).
*/
-asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
+asmlinkage unsigned int __irq_entry do_IRQ(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
struct irq_desc *desc;