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Diffstat (limited to 'arch/x86/oprofile/init.c')
-rw-r--r--arch/x86/oprofile/init.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/oprofile/init.c b/arch/x86/oprofile/init.c
index cdfe4c54dec..f148cf65267 100644
--- a/arch/x86/oprofile/init.c
+++ b/arch/x86/oprofile/init.c
@@ -21,6 +21,7 @@ extern int op_nmi_timer_init(struct oprofile_operations *ops);
21extern void op_nmi_exit(void); 21extern void op_nmi_exit(void);
22extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth); 22extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth);
23 23
24static int nmi_timer;
24 25
25int __init oprofile_arch_init(struct oprofile_operations *ops) 26int __init oprofile_arch_init(struct oprofile_operations *ops)
26{ 27{
@@ -31,8 +32,9 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
31#ifdef CONFIG_X86_LOCAL_APIC 32#ifdef CONFIG_X86_LOCAL_APIC
32 ret = op_nmi_init(ops); 33 ret = op_nmi_init(ops);
33#endif 34#endif
35 nmi_timer = (ret != 0);
34#ifdef CONFIG_X86_IO_APIC 36#ifdef CONFIG_X86_IO_APIC
35 if (ret < 0) 37 if (nmi_timer)
36 ret = op_nmi_timer_init(ops); 38 ret = op_nmi_timer_init(ops);
37#endif 39#endif
38 ops->backtrace = x86_backtrace; 40 ops->backtrace = x86_backtrace;
@@ -44,6 +46,7 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
44void oprofile_arch_exit(void) 46void oprofile_arch_exit(void)
45{ 47{
46#ifdef CONFIG_X86_LOCAL_APIC 48#ifdef CONFIG_X86_LOCAL_APIC
47 op_nmi_exit(); 49 if (!nmi_timer)
50 op_nmi_exit();
48#endif 51#endif
49} 52}