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Subject[PATCH 05/13] macintosh/mac_hid.c: use new sysctl subdir helper register_sysctl_subdir()
Date
This simplifies the code considerably. The following coccinelle
SmPL grammar rule was used to transform this code.

// pycocci sysctl-subdir.cocci drivers/macintosh/mac_hid.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 <mcgrof@kernel.org>
---
drivers/macintosh/mac_hid.c | 25 ++-----------------------
1 file changed, 2 insertions(+), 23 deletions(-)

diff --git a/drivers/macintosh/mac_hid.c b/drivers/macintosh/mac_hid.c
index 28b8581b44dd..736d0e151716 100644
--- a/drivers/macintosh/mac_hid.c
+++ b/drivers/macintosh/mac_hid.c
@@ -239,33 +239,12 @@ static struct ctl_table mac_hid_files[] = {
{ }
};

-/* dir in /proc/sys/dev */
-static struct ctl_table mac_hid_dir[] = {
- {
- .procname = "mac_hid",
- .maxlen = 0,
- .mode = 0555,
- .child = mac_hid_files,
- },
- { }
-};
-
-/* /proc/sys/dev itself, in case that is not there yet */
-static struct ctl_table mac_hid_root_dir[] = {
- {
- .procname = "dev",
- .maxlen = 0,
- .mode = 0555,
- .child = mac_hid_dir,
- },
- { }
-};
-
static struct ctl_table_header *mac_hid_sysctl_header;

static int __init mac_hid_init(void)
{
- mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
+ mac_hid_sysctl_header = register_sysctl_subdir("dev", "mac_hid",
+ mac_hid_files);
if (!mac_hid_sysctl_header)
return -ENOMEM;

--
2.26.2
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