kernel_optimize_test/tools/perf/bench
Irina Tirdea 1d037ca164 perf tools: Use __maybe_used for unused variables
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>
2012-09-11 12:19:15 -03:00
..
bench.h perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
mem-memcpy-arch.h perf bench: Add feature that measures the performance of the arch/x86/lib/memcpy_64.S memcpy routines via 'perf bench mem' 2010-11-26 08:15:57 +01:00
mem-memcpy-x86-64-asm-def.h perf bench: Also allow measuring alternative memcpy implementations 2012-01-24 19:51:01 -02:00
mem-memcpy-x86-64-asm.S Merge branch 'perf/urgent' into perf/core 2012-02-06 19:11:02 -02:00
mem-memcpy.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
mem-memset-arch.h perf bench: Also allow measuring memset() 2012-01-24 20:25:32 -02:00
mem-memset-x86-64-asm-def.h perf bench: Also allow measuring memset() 2012-01-24 20:25:32 -02:00
mem-memset-x86-64-asm.S perf tool: Fix perf stack to non executable on x86_64 2012-02-06 19:14:17 -02:00
mem-memset.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
sched-messaging.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00
sched-pipe.c perf tools: Use __maybe_used for unused variables 2012-09-11 12:19:15 -03:00