This simplifies the code considerably. The following coccinelle SmPL grammar rule was used to transform this code.
// pycocci sysctl-subdir.cocci drivers/cdrom/cdrom.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/cdrom/cdrom.c | 23 ++--------------------- 1 file changed, 2 insertions(+), 21 deletions(-)
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c index a0a7ae705de8..3c638f464cef 100644 --- a/drivers/cdrom/cdrom.c +++ b/drivers/cdrom/cdrom.c @@ -3719,26 +3719,6 @@ static struct ctl_table cdrom_table[] = { { } };
-static struct ctl_table cdrom_cdrom_table[] = { - { - .procname = "cdrom", - .maxlen = 0, - .mode = 0555, - .child = cdrom_table, - }, - { } -}; - -/* Make sure that /proc/sys/dev is there */ -static struct ctl_table cdrom_root_table[] = { - { - .procname = "dev", - .maxlen = 0, - .mode = 0555, - .child = cdrom_cdrom_table, - }, - { } -}; static struct ctl_table_header *cdrom_sysctl_header;
static void cdrom_sysctl_register(void) @@ -3748,7 +3728,8 @@ static void cdrom_sysctl_register(void) if (!atomic_add_unless(&initialized, 1, 1)) return;
- cdrom_sysctl_header = register_sysctl_table(cdrom_root_table); + cdrom_sysctl_header = register_sysctl_subdir("dev", "cdrom", + cdrom_table);
/* set the defaults */ cdrom_sysctl_settings.autoclose = autoclose;