selftests/cachestat: Fix print_cachestat format

JIRA: https://issues.redhat.com/browse/RHEL-50302

commit 3aa779a
Author: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
Date:   Fri Oct 13 13:36:26 2023 +0200

    selftests/cachestat: Fix print_cachestat format

    Compiling cachestat selftest after adding a __printf() attribute to
    ksft_print_msg() exposes a -Wformat warning in print_cachestat().
    The format specifier in printf() call expects long int variables and
    received long long int.

    Change format specifiers to long long int so they match passed
    variables.

    Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
    Acked-by: Nhat Pham <nphamcs@gmail.com>
    Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

Signed-off-by: Eric Chanudet <echanude@redhat.com>

Author: eric-ch

tools/testing/selftests/cachestat/test_cachestat.c

@@ -27,7 +27,7 @@ static const char * const dev_files[] = {
 void print_cachestat(struct cachestat *cs)
 {
 	ksft_print_msg(
-	"Using cachestat: Cached: %lu, Dirty: %lu, Writeback: %lu, Evicted: %lu, Recently Evicted: %lu\n",
+	"Using cachestat: Cached: %llu, Dirty: %llu, Writeback: %llu, Evicted: %llu, Recently Evicted: %llu\n",
 	cs->nr_cache, cs->nr_dirty, cs->nr_writeback,
 	cs->nr_evicted, cs->nr_recently_evicted);
 }