[PATCH 07/13] test_sysctl: use new sysctl subdir helper register_sysctl_subdir()

[Luis Chamberlain]

This simplifies the code considerably. The following coccinelle
SmPL grammar rule was used to transform this code.

// pycocci sysctl-subdir.cocci lib/test_sysctl.c

@c1@
expression E1;
identifier subdir, sysctls;
@@

static struct ctl_table subdir[] = {
        {
                .procname = E1,
                .maxlen = 0,
                .mode = 0555,
                .child = sysctls,
        },
        { }
};

@c2@
identifier c1.subdir;

expression E2;
identifier base;
@@

static struct ctl_table base[] = {
        {
                .procname = E2,
                .maxlen = 0,
                .mode = 0555,
                .child = subdir,
        },
        { }
};

@c3@
identifier c2.base;
identifier header;
@@

header = register_sysctl_table(base);

@r1 depends on c1 && c2 && c3@
expression c1.E1;
identifier c1.subdir, c1.sysctls;
@@

-static struct ctl_table subdir[] = {
-       {
-               .procname = E1,
-               .maxlen = 0,
-               .mode = 0555,
-               .child = sysctls,
-       },
-       { }
-};

@r2 depends on c1 && c2 && c3@
identifier c1.subdir;

expression c2.E2;
identifier c2.base;
@@
-static struct ctl_table base[] = {
-       {
-               .procname = E2,
-               .maxlen = 0,
-               .mode = 0555,
-               .child = subdir,
-       },
-       { }
-};

@r3 depends on c1 && c2 && c3@
expression c1.E1;
identifier c1.sysctls;
expression c2.E2;
identifier c2.base;
identifier c3.header;
@@

header =
-register_sysctl_table(base);
+register_sysctl_subdir(E2, E1, sysctls);

Generated-by: Coccinelle SmPL
Signed-off-by: Luis Chamberlain <mcg...@kernel.org>
---
 lib/test_sysctl.c | 23 ++---------------------
 1 file changed, 2 insertions(+), 21 deletions(-)

diff --git a/lib/test_sysctl.c b/lib/test_sysctl.c
index 84eaae22d3a6..b17581307756 100644
--- a/lib/test_sysctl.c
+++ b/lib/test_sysctl.c
@@ -128,26 +128,6 @@ static struct ctl_table test_table[] = {
        { }
 };
 
-static struct ctl_table test_sysctl_table[] = {
-       {
-               .procname       = "test_sysctl",
-               .maxlen         = 0,
-               .mode           = 0555,
-               .child          = test_table,
-       },
-       { }
-};
-
-static struct ctl_table test_sysctl_root_table[] = {
-       {
-               .procname       = "debug",
-               .maxlen         = 0,
-               .mode           = 0555,
-               .child          = test_sysctl_table,
-       },
-       { }
-};
-
 static struct ctl_table_header *test_sysctl_header;
 
 static int __init test_sysctl_init(void)
@@ -155,7 +135,8 @@ static int __init test_sysctl_init(void)
        test_data.bitmap_0001 = kzalloc(SYSCTL_TEST_BITMAP_SIZE/8, GFP_KERNEL);
        if (!test_data.bitmap_0001)
                return -ENOMEM;
-       test_sysctl_header = register_sysctl_table(test_sysctl_root_table);
+       test_sysctl_header = register_sysctl_subdir("debug", "test_sysctl",
+                                                   test_table);
        if (!test_sysctl_header) {
                kfree(test_data.bitmap_0001);
                return -ENOMEM;
-- 
2.26.2