xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

perf tools: Use __maybe_used for unused variables

Browse Source 
perf defines both __used and __unused variables to use for marking
unused variables. The variable __used is defined to
__attribute__((__unused__)), which contradicts the kernel definition to
__attribute__((__used__)) for new gcc versions. On Android, __used is
also defined in system headers and this leads to warnings like: warning:
'__used__' attribute ignored

__unused is not defined in the kernel and is not a standard definition.
If __unused is included everywhere instead of __used, this leads to
conflicts with glibc headers, since glibc has a variables with this name
in its headers.

The best approach is to use __maybe_unused, the definition used in the
kernel for __attribute__((unused)). In this way there is only one
definition in perf sources (instead of 2 definitions that point to the
same thing: __used and __unused) and it works on both Linux and Android.
This patch simply replaces all instances of __used and __unused with
__maybe_unused.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1347315303-29906-7-git-send-email-irina.tirdea@intel.com
[ committer note: fixed up conflict with a116e05 in builtin-sched.c ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Irina Tirdea
2012-09-11 01:15:03 +03:00
committed by Arnaldo Carvalho de Melo
parent 7dbf4dcfe2
commit 1d037ca164
76 changed files with 498 additions and 418 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
tools/perf/builtin-report.c
View File

@@ -223,9 +223,9 @@ static int process_sample_event(struct perf_tool *tool,
static int process_read_event(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample __used,
struct perf_sample *sample __maybe_unused,
struct perf_evsel *evsel,
struct machine *machine __used)
struct machine *machine __maybe_unused)
{
struct perf_report *rep = container_of(tool, struct perf_report, tool);
@@ -287,7 +287,7 @@ static int perf_report__setup_sample_type(struct perf_report *rep)
extern volatile int session_done;
static void sig_handler(int sig __used)
static void sig_handler(int sig __maybe_unused)
{
session_done = 1;
}
@@ -533,13 +533,14 @@ setup:
}
static int
parse_branch_mode(const struct option *opt __used, const char *str __used, int unset)
parse_branch_mode(const struct option *opt __maybe_unused,
const char *str __maybe_unused, int unset)
{
sort__branch_mode = !unset;
return 0;
}
int cmd_report(int argc, const char **argv, const char *prefix __used)
int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
{
struct perf_session *session;
struct stat st;