memblock tests: add command line help option

Add a help command line option to the help message. Add the help option
to the short and long options so it will be recognized as a valid
option.

Usage:
    $ ./main -h

    Or:
    $ ./main --help

Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/0f3b93a79de78c0da1ca90f74fe35e9a85c7cf93.1660451025.git.remckee0@gmail.com

diff --git a/tools/testing/memblock/tests/common.c b/tools/testing/memblock/tests/common.c
index e43b2676af816c03c815a77bf537d968931775bc..76a8ad818f3a76422a312422e513977e23c6094a 100644 (file)
--- a/tools/testing/memblock/tests/common.c
+++ b/tools/testing/memblock/tests/common.c
@@ -14,14 +14,16 @@ static struct test_memory memory_block;
 static const char __maybe_unused *prefixes[PREFIXES_MAX];
 static int __maybe_unused nr_prefixes;
 
-static const char *short_opts = "mv";
+static const char *short_opts = "hmv";
 static const struct option long_opts[] = {
+       {"help", 0, NULL, 'h'},
        {"movable-node", 0, NULL, 'm'},
        {"verbose", 0, NULL, 'v'},
        {NULL, 0, NULL, 0}
 };
 
 static const char * const help_opts[] = {
+       "display this help message and exit",
        "disallow allocations from regions marked as hotplugged\n\t\t\t"
                "by simulating enabling the \"movable_node\" kernel\n\t\t\t"
                "parameter",