tools feature: Rename HAVE_EVENTFD to HAVE_EVENTFD_SUPPORT

To be consistent with other such auto-detected features.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Anand K Mistry <amistry@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Makefile.config

@@ -346,7 +346,7 @@ ifndef NO_BIONIC
 endif
 
 ifeq ($(feature-eventfd), 1)
-  CFLAGS += -DHAVE_EVENTFD
+  CFLAGS += -DHAVE_EVENTFD_SUPPORT
 endif
 
 ifeq ($(feature-get_current_dir_name), 1)

tools/perf/bench/epoll-ctl.c

@@ -5,7 +5,7 @@
  * Benchmark the various operations allowed for epoll_ctl(2).
  * The idea is to concurrently stress a single epoll instance
  */
-#ifdef HAVE_EVENTFD
+#ifdef HAVE_EVENTFD_SUPPORT
 /* For the CLR_() macros */
 #include <string.h>
 #include <pthread.h>
@@ -412,4 +412,4 @@ int bench_epoll_ctl(int argc, const char **argv)
 errmem:
 	err(EXIT_FAILURE, "calloc");
 }
-#endif // HAVE_EVENTFD
+#endif // HAVE_EVENTFD_SUPPORT

tools/perf/bench/epoll-wait.c

 // SPDX-License-Identifier: GPL-2.0
-#ifdef HAVE_EVENTFD
+#ifdef HAVE_EVENTFD_SUPPORT
 /*
  * Copyright (C) 2018 Davidlohr Bueso.
  *
@@ -540,4 +540,4 @@ int bench_epoll_wait(int argc, const char **argv)
 errmem:
 	err(EXIT_FAILURE, "calloc");
 }
-#endif // HAVE_EVENTFD
+#endif // HAVE_EVENTFD_SUPPORT

tools/perf/builtin-bench.c

@@ -67,14 +67,14 @@ static struct bench futex_benchmarks[] = {
 	{ NULL,		NULL,						NULL			}
 };
 
-#ifdef HAVE_EVENTFD
+#ifdef HAVE_EVENTFD_SUPPORT
 static struct bench epoll_benchmarks[] = {
 	{ "wait",	"Benchmark epoll concurrent epoll_waits",       bench_epoll_wait	},
 	{ "ctl",	"Benchmark epoll concurrent epoll_ctls",        bench_epoll_ctl		},
 	{ "all",	"Run all futex benchmarks",			NULL			},
 	{ NULL,		NULL,						NULL			}
 };
-#endif // HAVE_EVENTFD
+#endif // HAVE_EVENTFD_SUPPORT
 
 static struct bench internals_benchmarks[] = {
 	{ "synthesize", "Benchmark perf event synthesis",	bench_synthesize	},
@@ -95,7 +95,7 @@ static struct collection collections[] = {
 	{ "numa",	"NUMA scheduling and MM benchmarks",		numa_benchmarks		},
 #endif
 	{"futex",       "Futex stressing benchmarks",                   futex_benchmarks        },
-#ifdef HAVE_EVENTFD
+#ifdef HAVE_EVENTFD_SUPPORT
 	{"epoll",       "Epoll stressing benchmarks",                   epoll_benchmarks        },
 #endif
 	{ "internals",	"Perf-internals benchmarks",			internals_benchmarks	},