perf pmu: Switch FILENAME_MAX to NAME_MAX

JIRA: https://issues.redhat.com/browse/RHEL-78198

upstream
========
commit 82aac55
Author: Ian Rogers <irogers@google.com>
Date: Thu Jul 17 08:08:54 2025 -0700

description
===========
FILENAME_MAX is the same as PATH_MAX (4kb) in glibc rather than
NAME_MAX's 255. Switch to using NAME_MAX and ensure the '\0' is
accounted for in the path's buffer size.

Fixes: 754baf4 ("perf pmu: Change aliases from list to hashmap")
    Signed-off-by: Ian Rogers <irogers@google.com>
    Link: https://lore.kernel.org/r/20250717150855.1032526-2-irogers@google.com
    Signed-off-by: Namhyung Kim <namhyung@kernel.org>

Signed-off-by: Michael Petlan <mpetlan@redhat.com>

Author: rfmvh

tools/perf/util/pmu.c

@@ -452,7 +452,7 @@ static struct perf_pmu_alias *perf_pmu__find_alias(struct perf_pmu *pmu,
 {
 	struct perf_pmu_alias *alias;
 	bool has_sysfs_event;
-	char event_file_name[FILENAME_MAX + 8];
+	char event_file_name[NAME_MAX + 8];
 
 	if (hashmap__find(pmu->aliases, name, &alias))
 		return alias;
@@ -751,7 +751,7 @@ static int pmu_aliases_parse(struct perf_pmu *pmu)
 
 static int pmu_aliases_parse_eager(struct perf_pmu *pmu, int sysfs_fd)
 {
-	char path[FILENAME_MAX + 7];
+	char path[NAME_MAX + 8];
 	int ret, events_dir_fd;
 
 	scnprintf(path, sizeof(path), "%s/events", pmu->name);