[v2,4/4] perf cs-etm: Fix unsigned variable comparison to zero
diff mbox series

Message ID 20191101020750.29063-5-leo.yan@linaro.org
State New
Headers show
Series
  • perf cs-etm: Fix synthesizing instruction samples
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Commit Message

Leo Yan Nov. 1, 2019, 2:07 a.m. UTC
The variable 'offset' in function cs_etm__sample() is u64 type, it's not
appropriate to check it with 'while (offset > 0)'; this patch changes to
'while (offset)'.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
---
 tools/perf/util/cs-etm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch
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diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index d9a857abaca8..52fe7d6d4f29 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -945,7 +945,7 @@  static inline u64 cs_etm__instr_addr(struct cs_etm_queue *etmq,
 	if (packet->isa == CS_ETM_ISA_T32) {
 		u64 addr = packet->start_addr;
 
-		while (offset > 0) {
+		while (offset) {
 			addr += cs_etm__t32_instr_size(etmq,
 						       trace_chan_id, addr);
 			offset--;