Before patch: # tracer: power # # TASK-PID CPU# TIMESTAMP FUNCTION # | | | | | [ 676.875865889] CSTATE: Going to C1 on cpu 0 for 0.005911463 [ 676.882938805] CSTATE: Going to C1 on cpu 0 for 0.104796532 ... After patch: # tracer: power # # TIMESTAMP STATE EVENT # | | | [ 676.875865889] CSTATE: Going to C1 on cpu 0 for 0.005911463 [ 676.882938805] CSTATE: Going to C1 on cpu 0 for 0.104796532 ... v2: Use seq_puts instead of seq_printf
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| @@ -186,6 +186,12 @@ static enum print_line_t power_print_line(struct trace_iterator *iter) · 185 unmodified lines | |||
| 186 | return TRACE_TYPE_UNHANDLED; | 186 | return TRACE_TYPE_UNHANDLED; |
| 187 | } | 187 | } |
| 188 | 188 | ||
| 189 | static void power_print_header(struct seq_file *s) | ||
| 190 | { | ||
| 191 | seq_puts(s, "# TIMESTAMP STATE EVENT\n"); | ||
| 192 | seq_puts(s, "# | | |\n"); | ||
| 193 | } | ||
| 194 | |||
| 189 | static struct tracer power_tracer __read_mostly = | 195 | static struct tracer power_tracer __read_mostly = |
| 190 | { | 196 | { |
| 191 | .name = "power", | 197 | .name = "power", |
| @@ -194,6 +200,7 @@ static struct tracer power_tracer __read_mostly = · 2 unmodified lines | |||
| 194 | .stop = stop_power_trace, | 200 | .stop = stop_power_trace, |
| 195 | .reset = power_trace_reset, | 201 | .reset = power_trace_reset, |
| 196 | .print_line = power_print_line, | 202 | .print_line = power_print_line, |
| 203 | .print_header = power_print_header, | ||
| 197 | }; | 204 | }; |
| 198 | 205 | ||
| 199 | static int init_power_trace(void) | 206 | static int init_power_trace(void) |