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Commit 5deb45e3 authored by Steven Rostedt's avatar Steven Rostedt Committed by Ingo Molnar
Browse files

ftrace: add notrace annotations for NMI routines 



This annotates NMI functions with notrace. Some tracers may be able
to live with this, but some cannot. The safest is to turn it off,
it's not particularly interesting anyway.

Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 4bd01600

arch/x86/kernel/nmi_32.c

+2 −1
Original line number Diff line number Diff line
@@ -321,7 +321,8 @@ EXPORT_SYMBOL(touch_nmi_watchdog); 


extern void die_nmi(struct pt_regs *, const char *msg);



__kprobes int nmi_watchdog_tick(struct pt_regs * regs, unsigned reason)

notrace __kprobes int

nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)

{



	/*

arch/x86/kernel/nmi_64.c

+4 −2
Original line number Diff line number Diff line
@@ -313,7 +313,8 @@ void touch_nmi_watchdog(void) 
}

EXPORT_SYMBOL(touch_nmi_watchdog);



int __kprobes nmi_watchdog_tick(struct pt_regs * regs, unsigned reason)

notrace __kprobes int

nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)

{

	int sum;

	int touched = 0;
@@ -384,7 +385,8 @@ int __kprobes nmi_watchdog_tick(struct pt_regs * regs, unsigned reason) 


static unsigned ignore_nmis;



asmlinkage __kprobes void do_nmi(struct pt_regs * regs, long error_code)

asmlinkage notrace __kprobes void

do_nmi(struct pt_regs *regs, long error_code)

{

	nmi_enter();

	add_pda(__nmi_count,1);

arch/x86/kernel/traps_32.c

+6 −6
Original line number Diff line number Diff line
@@ -681,7 +681,7 @@ void __kprobes do_general_protection(struct pt_regs *regs, long error_code) 
	}

}



static __kprobes void

static notrace __kprobes void

mem_parity_error(unsigned char reason, struct pt_regs *regs)

{

	printk(KERN_EMERG
@@ -707,7 +707,7 @@ mem_parity_error(unsigned char reason, struct pt_regs *regs) 
	clear_mem_error(reason);

}



static __kprobes void

static notrace __kprobes void

io_check_error(unsigned char reason, struct pt_regs *regs)

{

	unsigned long i;
@@ -727,7 +727,7 @@ io_check_error(unsigned char reason, struct pt_regs *regs) 
	outb(reason, 0x61);

}



static __kprobes void

static notrace __kprobes void

unknown_nmi_error(unsigned char reason, struct pt_regs *regs)

{

	if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
@@ -755,7 +755,7 @@ unknown_nmi_error(unsigned char reason, struct pt_regs *regs) 


static DEFINE_SPINLOCK(nmi_print_lock);



void __kprobes die_nmi(struct pt_regs *regs, const char *msg)

void notrace __kprobes die_nmi(struct pt_regs *regs, const char *msg)

{

	if (notify_die(DIE_NMIWATCHDOG, msg, regs, 0, 2, SIGINT) == NOTIFY_STOP)

		return;
@@ -786,7 +786,7 @@ void __kprobes die_nmi(struct pt_regs *regs, const char *msg) 
	do_exit(SIGSEGV);

}



static __kprobes void default_do_nmi(struct pt_regs *regs)

static notrace __kprobes void default_do_nmi(struct pt_regs *regs)

{

	unsigned char reason = 0;
@@ -828,7 +828,7 @@ static __kprobes void default_do_nmi(struct pt_regs *regs) 


static int ignore_nmis;



__kprobes void do_nmi(struct pt_regs *regs, long error_code)

notrace __kprobes void do_nmi(struct pt_regs *regs, long error_code)

{

	int cpu;

arch/x86/kernel/traps_64.c

+6 −5
Original line number Diff line number Diff line
@@ -600,7 +600,8 @@ void die(const char * str, struct pt_regs * regs, long err) 
	oops_end(flags, regs, SIGSEGV);

}



void __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic)

notrace __kprobes void

die_nmi(char *str, struct pt_regs *regs, int do_panic)

{

	unsigned long flags;
@@ -772,7 +773,7 @@ asmlinkage void __kprobes do_general_protection(struct pt_regs * regs, 
	die("general protection fault", regs, error_code);

}



static __kprobes void

static notrace __kprobes void

mem_parity_error(unsigned char reason, struct pt_regs * regs)

{

	printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
@@ -796,7 +797,7 @@ mem_parity_error(unsigned char reason, struct pt_regs * regs) 
	outb(reason, 0x61);

}



static __kprobes void

static notrace __kprobes void

io_check_error(unsigned char reason, struct pt_regs * regs)

{

	printk("NMI: IOCK error (debug interrupt?)\n");
@@ -810,7 +811,7 @@ io_check_error(unsigned char reason, struct pt_regs * regs) 
	outb(reason, 0x61);

}



static __kprobes void

static notrace __kprobes void

unknown_nmi_error(unsigned char reason, struct pt_regs * regs)

{

	if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
@@ -827,7 +828,7 @@ unknown_nmi_error(unsigned char reason, struct pt_regs * regs) 


/* Runs on IST stack. This code must keep interrupts off all the time.

   Nested NMIs are prevented by the CPU. */

asmlinkage __kprobes void default_do_nmi(struct pt_regs *regs)

asmlinkage notrace  __kprobes void default_do_nmi(struct pt_regs *regs)

{

	unsigned char reason = 0;

	int cpu;