lkml.org 
[lkml]   [2017]   [Nov]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 39/83] perf evsel: Enable type checking for perf_evsel_config_term types
Date
From: Andi Kleen <ak@linux.intel.com>

Use a typed enum for the perf_evsel_config_term type enum. This allows
gcc to do much stronger type checks, and also check for missing case
statements.

I removed the unused _MAX member from the number.

It found one missing case. I'm not sure it's a real problem, so I just
turned it into a BUG_ON for now.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20171020202755.21410-1-andi@firstfloor.org
[ Renamed the enum name to term_type as per jolsa's request ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/evsel.c | 2 ++
tools/perf/util/evsel.h | 5 ++---
2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index bfde6a7a80f2..4376cdfaea49 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -779,6 +779,8 @@ static void apply_config_terms(struct perf_evsel *evsel,
case PERF_EVSEL__CONFIG_TERM_OVERWRITE:
attr->write_backward = term->val.overwrite ? 1 : 0;
break;
+ case PERF_EVSEL__CONFIG_TERM_DRV_CFG:
+ BUG_ON(1);
default:
break;
}
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 157f49e8a772..0688880227e1 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -38,7 +38,7 @@ struct cgroup_sel;
* It is allocated within event parsing and attached to
* perf_evsel::config_terms list head.
*/
-enum {
+enum term_type {
PERF_EVSEL__CONFIG_TERM_PERIOD,
PERF_EVSEL__CONFIG_TERM_FREQ,
PERF_EVSEL__CONFIG_TERM_TIME,
@@ -49,12 +49,11 @@ enum {
PERF_EVSEL__CONFIG_TERM_OVERWRITE,
PERF_EVSEL__CONFIG_TERM_DRV_CFG,
PERF_EVSEL__CONFIG_TERM_BRANCH,
- PERF_EVSEL__CONFIG_TERM_MAX,
};

struct perf_evsel_config_term {
struct list_head list;
- int type;
+ enum term_type type;
union {
u64 period;
u64 freq;
--
2.13.6
\
 
 \ /
  Last update: 2017-11-17 21:32    [W:0.171 / U:3.768 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site