[for-next][PATCH 19/24] tracing: Merge seq_print_sym_short() and seq_print_sym_offset()

Steven Rostedt
2018-12-21T17:57:21Z

From: Rasmus Villemoes <linux@rasmusvillemoes.dk>

These two functions are nearly identical, so we can avoid some code
duplication by moving the conditional into a common implementation.

Link: http://lkml.kernel.org/r/20181029223542.26175-2-linux@rasmusvillemoes.dk

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/trace/trace_output.c | 34 +++++++---------------------------
1 file changed, 7 insertions(+), 27 deletions(-)

diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 6e6cc64faa38..85ecd061c7be 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -339,34 +339,17 @@ static inline const char *kretprobed(const char *name)
#endif /* CONFIG_KRETPROBES */

static void
-seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
+seq_print_sym(struct trace_seq *s, const char *fmt, unsigned long address,
+ bool offset)
{
char str[KSYM_SYMBOL_LEN];
#ifdef CONFIG_KALLSYMS
const char *name;

- kallsyms_lookup(address, NULL, NULL, NULL, str);
-
- name = kretprobed(str);
-
- if (name && strlen(name)) {
- trace_seq_printf(s, fmt, name);
- return;
- }
-#endif
- snprintf(str, KSYM_SYMBOL_LEN, "0x%08lx", address);
- trace_seq_printf(s, fmt, str);
-}
-
-static void
-seq_print_sym_offset(struct trace_seq *s, const char *fmt,
- unsigned long address)
-{
- char str[KSYM_SYMBOL_LEN];
-#ifdef CONFIG_KALLSYMS
- const char *name;
-
- sprint_symbol(str, address);
+ if (offset)
+ sprint_symbol(str, address);
+ else
+ kallsyms_lookup(address, NULL, NULL, NULL, str);
name = kretprobed(str);

if (name && strlen(name)) {
@@ -424,10 +407,7 @@ seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
goto out;
}

- if (sym_flags & TRACE_ITER_SYM_OFFSET)
- seq_print_sym_offset(s, "%s", ip);
- else
- seq_print_sym_short(s, "%s", ip);
+ seq_print_sym(s, "%s", ip, sym_flags & TRACE_ITER_SYM_OFFSET);

if (sym_flags & TRACE_ITER_SYM_ADDR)
trace_seq_printf(s, " <" IP_FMT ">", ip);
--
2.19.2