[PATCH v2 4/8] selftests/mm: Add -Wunused family of flags

[Muhammad Usama Anjum <usama.anjum@collabora.com>]

Add -Wunused family of flags and fix all the warnings coming because of
argc and argv. Remove them if they aren't being used entirely. Use
__unused compiler attribute with argc where argv is being used.

Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
---
 tools/testing/selftests/mm/Makefile                | 2 +-
 tools/testing/selftests/mm/compaction_test.c       | 2 +-
 tools/testing/selftests/mm/cow.c                   | 2 +-
 tools/testing/selftests/mm/droppable.c             | 2 +-
 tools/testing/selftests/mm/gup_longterm.c          | 2 +-
 tools/testing/selftests/mm/hugepage-vmemmap.c      | 2 +-
 tools/testing/selftests/mm/hugetlb-madvise.c       | 2 +-
 tools/testing/selftests/mm/hugetlb-soft-offline.c  | 2 +-
 tools/testing/selftests/mm/madv_populate.c         | 2 +-
 tools/testing/selftests/mm/map_populate.c          | 2 +-
 tools/testing/selftests/mm/memfd_secret.c          | 2 +-
 tools/testing/selftests/mm/mlock-random-test.c     | 2 +-
 tools/testing/selftests/mm/mlock2-tests.c          | 2 +-
 tools/testing/selftests/mm/on-fault-limit.c        | 2 +-
 tools/testing/selftests/mm/pkey_sighandler_tests.c | 2 +-
 tools/testing/selftests/mm/soft-dirty.c            | 2 +-
 tools/testing/selftests/mm/uffd-wp-mremap.c        | 2 +-
 tools/testing/selftests/mm/virtual_address_range.c | 2 +-
 18 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile
index 23d4bf6215465..d75f1effcb791 100644
--- a/tools/testing/selftests/mm/Makefile
+++ b/tools/testing/selftests/mm/Makefile
@@ -20,7 +20,6 @@ endif
 # thus tricking Make (and you!) into believing that All Is Well, in subsequent
 # make invocations:
 .DELETE_ON_ERROR:
-
 # Avoid accidental wrong builds, due to built-in rules working just a little
 # bit too well--but not quite as well as required for our situation here.
 #
@@ -35,6 +34,7 @@ MAKEFLAGS += --no-builtin-rules
 
 CFLAGS = -Wall -O2 -I $(top_srcdir) $(EXTRA_CFLAGS) $(KHDR_INCLUDES) $(TOOLS_INCLUDES)
 CFLAGS += -Wunreachable-code
+CFLAGS += -Wunused  -Wunused-parameter -Wunused-function -Wunused-label -Wunused-variable -Wunused-value
 LDLIBS = -lrt -lpthread -lm
 
 # Some distributions (such as Ubuntu) configure GCC so that _FORTIFY_SOURCE is
diff --git a/tools/testing/selftests/mm/compaction_test.c b/tools/testing/selftests/mm/compaction_test.c
index 9bc4591c7b169..4fa03679e9b07 100644
--- a/tools/testing/selftests/mm/compaction_test.c
+++ b/tools/testing/selftests/mm/compaction_test.c
@@ -203,7 +203,7 @@ int set_zero_hugepages(unsigned long *initial_nr_hugepages)
 	return ret;
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 	struct rlimit lim;
 	struct map_list *list = NULL, *entry;
diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c
index d30625c18259b..eb1ccf067b633 100644
--- a/tools/testing/selftests/mm/cow.c
+++ b/tools/testing/selftests/mm/cow.c
@@ -1857,7 +1857,7 @@ static int tests_per_non_anon_test_case(void)
 	return tests;
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 	struct thp_settings default_settings;
 
diff --git a/tools/testing/selftests/mm/droppable.c b/tools/testing/selftests/mm/droppable.c
index f3d9ecf96890a..90ea6377810c5 100644
--- a/tools/testing/selftests/mm/droppable.c
+++ b/tools/testing/selftests/mm/droppable.c
@@ -15,7 +15,7 @@
 
 #include "../kselftest.h"
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	size_t alloc_size = 134217728;
 	size_t page_size = getpagesize();
diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c
index 268dadb8ce438..7fe4f94400cb6 100644
--- a/tools/testing/selftests/mm/gup_longterm.c
+++ b/tools/testing/selftests/mm/gup_longterm.c
@@ -504,7 +504,7 @@ static int tests_per_test_case(void)
 	return 3 + nr_hugetlbsizes;
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int i;
 
diff --git a/tools/testing/selftests/mm/hugepage-vmemmap.c b/tools/testing/selftests/mm/hugepage-vmemmap.c
index df366a4d1b92d..23e97e552057d 100644
--- a/tools/testing/selftests/mm/hugepage-vmemmap.c
+++ b/tools/testing/selftests/mm/hugepage-vmemmap.c
@@ -87,7 +87,7 @@ static int check_page_flags(unsigned long pfn)
 	return 0;
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 	void *addr;
 	unsigned long pfn;
diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c
index 1afe14b9dc0c3..27c8e46ae9b7d 100644
--- a/tools/testing/selftests/mm/hugetlb-madvise.c
+++ b/tools/testing/selftests/mm/hugetlb-madvise.c
@@ -55,7 +55,7 @@ void read_fault_pages(void *addr, unsigned long nr_pages)
 	}
 }
 
-int main(int argc, char **argv)
+int main(int __unused argc, char **argv)
 {
 	unsigned long free_hugepages;
 	void *addr, *addr2;
diff --git a/tools/testing/selftests/mm/hugetlb-soft-offline.c b/tools/testing/selftests/mm/hugetlb-soft-offline.c
index f086f0e04756f..cb087303f5ed3 100644
--- a/tools/testing/selftests/mm/hugetlb-soft-offline.c
+++ b/tools/testing/selftests/mm/hugetlb-soft-offline.c
@@ -216,7 +216,7 @@ static void test_soft_offline_common(int enable_soft_offline)
 			 enable_soft_offline);
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 	ksft_print_header();
 	ksft_set_plan(2);
diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c
index b6fabd5c27ed6..178e0ae0cd4a1 100644
--- a/tools/testing/selftests/mm/madv_populate.c
+++ b/tools/testing/selftests/mm/madv_populate.c
@@ -281,7 +281,7 @@ static int system_has_softdirty(void)
 #endif
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int nr_tests = 16;
 	int err;
diff --git a/tools/testing/selftests/mm/map_populate.c b/tools/testing/selftests/mm/map_populate.c
index 9df2636c829bf..2b240499f15c9 100644
--- a/tools/testing/selftests/mm/map_populate.c
+++ b/tools/testing/selftests/mm/map_populate.c
@@ -76,7 +76,7 @@ static int child_f(int sock, unsigned long *smap, int fd)
 	return ksft_cnt.ksft_pass;
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int sock[2], child, ret;
 	FILE *ftmp;
diff --git a/tools/testing/selftests/mm/memfd_secret.c b/tools/testing/selftests/mm/memfd_secret.c
index 9a0597310a765..836383f63b630 100644
--- a/tools/testing/selftests/mm/memfd_secret.c
+++ b/tools/testing/selftests/mm/memfd_secret.c
@@ -299,7 +299,7 @@ static void prepare(void)
 
 #define NUM_TESTS 6
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int fd;
 
diff --git a/tools/testing/selftests/mm/mlock-random-test.c b/tools/testing/selftests/mm/mlock-random-test.c
index b8d7e966f44c6..4ff7a4cfc7331 100644
--- a/tools/testing/selftests/mm/mlock-random-test.c
+++ b/tools/testing/selftests/mm/mlock-random-test.c
@@ -236,7 +236,7 @@ static void test_mlock_outof_limit(char *p, int alloc_size)
 	ksft_test_result_pass("%s\n", __func__);
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 	char *p = NULL;
 
diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c
index 3e90ff37e336a..ce5fd5ce1f51f 100644
--- a/tools/testing/selftests/mm/mlock2-tests.c
+++ b/tools/testing/selftests/mm/mlock2-tests.c
@@ -425,7 +425,7 @@ static void test_mlockall(void)
 	munlockall();
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int ret, size = 3 * getpagesize();
 	void *map;
diff --git a/tools/testing/selftests/mm/on-fault-limit.c b/tools/testing/selftests/mm/on-fault-limit.c
index 431c1277d83a1..ade160966c926 100644
--- a/tools/testing/selftests/mm/on-fault-limit.c
+++ b/tools/testing/selftests/mm/on-fault-limit.c
@@ -28,7 +28,7 @@ static void test_limit(void)
 	munlockall();
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 	ksft_print_header();
 	ksft_set_plan(1);
diff --git a/tools/testing/selftests/mm/pkey_sighandler_tests.c b/tools/testing/selftests/mm/pkey_sighandler_tests.c
index 302fef54049c8..eb4ef8532c0bf 100644
--- a/tools/testing/selftests/mm/pkey_sighandler_tests.c
+++ b/tools/testing/selftests/mm/pkey_sighandler_tests.c
@@ -528,7 +528,7 @@ static void (*pkey_tests[])(void) = {
 	test_pkru_sigreturn
 };
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int i;
 
diff --git a/tools/testing/selftests/mm/soft-dirty.c b/tools/testing/selftests/mm/soft-dirty.c
index 8a3f2b4b21869..e62be4136f69e 100644
--- a/tools/testing/selftests/mm/soft-dirty.c
+++ b/tools/testing/selftests/mm/soft-dirty.c
@@ -194,7 +194,7 @@ static void test_mprotect_file(int pagemap_fd, int pagesize)
 	test_mprotect(pagemap_fd, pagesize, false);
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int pagemap_fd;
 	int pagesize;
diff --git a/tools/testing/selftests/mm/uffd-wp-mremap.c b/tools/testing/selftests/mm/uffd-wp-mremap.c
index c2ba7d46c7b45..13ceb56289701 100644
--- a/tools/testing/selftests/mm/uffd-wp-mremap.c
+++ b/tools/testing/selftests/mm/uffd-wp-mremap.c
@@ -334,7 +334,7 @@ static const struct testcase testcases[] = {
 	},
 };
 
-int main(int argc, char **argv)
+int main(void)
 {
 	struct thp_settings settings;
 	int i, j, plan = 0;
diff --git a/tools/testing/selftests/mm/virtual_address_range.c b/tools/testing/selftests/mm/virtual_address_range.c
index 169dbd692bf5f..3c21d136962cb 100644
--- a/tools/testing/selftests/mm/virtual_address_range.c
+++ b/tools/testing/selftests/mm/virtual_address_range.c
@@ -189,7 +189,7 @@ static int validate_complete_va_space(void)
 	return 0;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	char *ptr[NR_CHUNKS_LOW];
 	char **hptr;
-- 
2.39.5