On Mon, Nov 07, 2022 at 05:55:10PM +0000, Paul Cercueil wrote:
> Instead of defining two versions of intel_sysfs_rc6_init(), one for each
> value of CONFIG_PM, add a check on !IS_ENABLED(CONFIG_PM) early in the
> function. This will allow the compiler to automatically drop the dead
> code when CONFIG_PM is disabled, without having to use #ifdef guards.
Making the RC6 to depend on the CONFIG_PM is probably an historical
mistake and probably the right solution is simply to remove that
dependency.
>
> This has the advantage of always compiling these functions in,
> independently of any Kconfig option. Thanks to that, bugs and other
> regressions are subsequently easier to catch.
>
> Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
> ---
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>
> Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> ---
> drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c | 8 +-------
> 1 file changed, 1 insertion(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c b/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c
> index 2b5f05b31187..decf892a4508 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c
> @@ -164,7 +164,6 @@ sysfs_gt_attribute_r_func(struct kobject *kobj, struct attribute *attr,
> NULL); \
> INTEL_GT_ATTR_RO(_name)
>
> -#ifdef CONFIG_PM
> static u32 get_residency(struct intel_gt *gt, i915_reg_t reg)
> {
> intel_wakeref_t wakeref;
> @@ -300,7 +299,7 @@ static void intel_sysfs_rc6_init(struct intel_gt *gt, struct kobject *kobj)
> {
> int ret;
>
> - if (!HAS_RC6(gt->i915))
> + if (!IS_ENABLED(CONFIG_PM) || !HAS_RC6(gt->i915))
> return;
>
> ret = __intel_gt_sysfs_create_group(kobj, rc6_attr_group);
> @@ -329,11 +328,6 @@ static void intel_sysfs_rc6_init(struct intel_gt *gt, struct kobject *kobj)
> gt->info.id, ERR_PTR(ret));
> }
> }
> -#else
> -static void intel_sysfs_rc6_init(struct intel_gt *gt, struct kobject *kobj)
> -{
> -}
> -#endif /* CONFIG_PM */
>
> static u32 __act_freq_mhz_show(struct intel_gt *gt)
> {
> --
> 2.35.1
>
