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ftrace: add ftrace_vprintk

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Impact: new helper function

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo 2009-01-23 12:06:23 -02:00 committed by Ingo Molnar
parent 5ce1b1ed27
commit 9011262a37
2 changed files with 17 additions and 0 deletions
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8
include/linux/ftrace.h
View File

@ -302,6 +302,9 @@ ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3);
extern int
__ftrace_printk(unsigned long ip, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
# define ftrace_vprintk(fmt, ap) __ftrace_printk(_THIS_IP_, fmt, ap)
extern int
__ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap);
extern void ftrace_dump(void);
#else
static inline void
@ -317,6 +320,11 @@ ftrace_printk(const char *fmt, ...)
{
return 0;
}
static inline int
ftrace_vprintk(const char *fmt, va_list ap)
{
return 0;
}
static inline void ftrace_dump(void) { }
#endif

9
kernel/trace/trace.c
View File

@ -2951,6 +2951,15 @@ int __ftrace_printk(unsigned long ip, const char *fmt, ...)
}
EXPORT_SYMBOL_GPL(__ftrace_printk);
int __ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap)
{
if (!(trace_flags & TRACE_ITER_PRINTK))
return 0;
return trace_vprintk(ip, task_curr_ret_stack(current), fmt, ap);
}
EXPORT_SYMBOL_GPL(__ftrace_vprintk);
static int trace_panic_handler(struct notifier_block *this,
unsigned long event, void *unused)
{