linux-kernel - [PATCH v3 2/3] soc: rockchip: power-domain: Replace dsb() with smb()

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Date:   Mon, 25 Apr 2022 18:45:43 -0700
From:   Brian Norris <briannorris@...omium.org>
To:     Heiko Stuebner <heiko@...ech.de>, Arnd Bergmann <arnd@...db.de>
Cc:     Robin Murphy <robin.murphy@....com>,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>,
        Brian Norris <briannorris@...omium.org>
Subject: [PATCH v3 2/3] soc: rockchip: power-domain: Replace dsb() with smb()

It's unclear if these are really needed at all, but seemingly their
purpose is only as a write barrier. Use the general macro instead of the
ARM-specific one.

This driver is partially marked for COMPILE_TEST'ing, but it doesn't
build under non-ARM architectures. Fix this up before *really* enabling
it for COMPILE_TEST.

Signed-off-by: Brian Norris <briannorris@...omium.org>
---

Changes in v3:
 * New in v3

 drivers/soc/rockchip/pm_domains.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/soc/rockchip/pm_domains.c b/drivers/soc/rockchip/pm_domains.c
index 1b029e494274..cf16ff9b73b3 100644
--- a/drivers/soc/rockchip/pm_domains.c
+++ b/drivers/soc/rockchip/pm_domains.c
@@ -178,7 +178,7 @@ static int rockchip_pmu_set_idle_request(struct rockchip_pm_domain *pd,
 		regmap_update_bits(pmu->regmap, pmu->info->req_offset,
 				   pd_info->req_mask, idle ? -1U : 0);
 
-	dsb(sy);
+	wmb();
 
 	/* Wait util idle_ack = 1 */
 	target_ack = idle ? pd_info->ack_mask : 0;
@@ -285,7 +285,7 @@ static void rockchip_do_pmu_set_power_domain(struct rockchip_pm_domain *pd,
 		regmap_update_bits(pmu->regmap, pmu->info->pwr_offset,
 				   pd->info->pwr_mask, on ? 0 : -1U);
 
-	dsb(sy);
+	wmb();
 
 	if (readx_poll_timeout_atomic(rockchip_pmu_domain_is_on, pd, is_on,
 				      is_on == on, 0, 10000)) {
-- 
2.36.0.rc2.479.g8af0fa9b8e-goog