This simplifies the code considerably. The following coccinelle SmPL grammar rule was used to transform this code.
// pycocci sysctl-subdir.cocci drivers/gpu/drm/i915/i915_perf.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/gpu/drm/i915/i915_perf.c | 22 +--------------------- 1 file changed, 1 insertion(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c index 665bb076e84d..52509b573794 100644 --- a/drivers/gpu/drm/i915/i915_perf.c +++ b/drivers/gpu/drm/i915/i915_perf.c @@ -4203,26 +4203,6 @@ static struct ctl_table oa_table[] = { {} };
-static struct ctl_table i915_root[] = { - { - .procname = "i915", - .maxlen = 0, - .mode = 0555, - .child = oa_table, - }, - {} -}; - -static struct ctl_table dev_root[] = { - { - .procname = "dev", - .maxlen = 0, - .mode = 0555, - .child = i915_root, - }, - {} -}; - /** * i915_perf_init - initialize i915-perf state on module bind * @i915: i915 device instance @@ -4383,7 +4363,7 @@ static int destroy_config(int id, void *p, void *data)
void i915_perf_sysctl_register(void) { - sysctl_header = register_sysctl_table(dev_root); + sysctl_header = register_sysctl_subdir("dev", "i915", oa_table); }
void i915_perf_sysctl_unregister(void)