ftrace: fix trace_output
Impact: fix bug for handling partial line
trace_seq_printf(), seq_print_userip_objs(), ... return
0 -- partial line was written
other(>0) -- success
duplicate output is also removed in trace_print_raw().
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/trace/trace_output.h b/kernel/trace/trace_output.h
index ecab4ea4..b2c1461 100644
--- a/kernel/trace/trace_output.h
+++ b/kernel/trace/trace_output.h
@@ -45,14 +45,14 @@
#define SEQ_PUT_FIELD_RET(s, x) \
do { \
if (!trace_seq_putmem(s, &(x), sizeof(x))) \
- return 0; \
+ return TRACE_TYPE_PARTIAL_LINE; \
} while (0)
#define SEQ_PUT_HEX_FIELD_RET(s, x) \
do { \
BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES); \
if (!trace_seq_putmem_hex(s, &(x), sizeof(x))) \
- return 0; \
+ return TRACE_TYPE_PARTIAL_LINE; \
} while (0)
#endif