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[SCSI] ftrace: add __print_hex()

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__print_hex() prints values in an array in hex (w/o '0x') (space separated)
EX) 92 33 32 f3 ee 4d

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com>
Signed-off-by: Kei Tokunaga <tokunaga.keiich@jp.fujitsu.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Kei Tokunaga 2010-04-01 20:40:58 +09:00 committed by James Bottomley
parent 59c31b69d2
commit 5a2e399595
3 changed files with 21 additions and 0 deletions
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3
include/linux/ftrace_event.h
View file

@ -25,6 +25,9 @@ const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
const char *ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
const struct trace_print_flags *symbol_array);
const char *ftrace_print_hex_seq(struct trace_seq *p,
const unsigned char *buf, int len);
/*
* The trace entry - the most basic unit of tracing. This is what
* is printed in the end as a single line in the trace output, such as:

3
include/trace/ftrace.h
View file

@ -198,6 +198,9 @@
ftrace_print_symbols_seq(p, value, symbols); \
})
#undef __print_hex
#define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
#undef DECLARE_EVENT_CLASS
#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
static notrace enum print_line_t \

15
kernel/trace/trace_output.c
View file

@ -355,6 +355,21 @@ ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
}
EXPORT_SYMBOL(ftrace_print_symbols_seq);
const char *
ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
{
int i;
const char *ret = p->buffer + p->len;
for (i = 0; i < buf_len; i++)
trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]);
trace_seq_putc(p, 0);
return ret;
}
EXPORT_SYMBOL(ftrace_print_hex_seq);
#ifdef CONFIG_KRETPROBES
static inline const char *kretprobed(const char *name)
{