linux-kernel - [PATCH v2 12/24] drm/msm: avoid using 'timespec'

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Message-Id: <20191213205417.3871055-3-arnd@arndb.de>
Date:   Fri, 13 Dec 2019 21:53:40 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     y2038@...ts.linaro.org, linux-kernel@...r.kernel.org,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Jeykumar Sankaran <jsanka@...eaurora.org>,
        Sam Ravnborg <sam@...nborg.org>, Joe Perches <joe@...ches.com>,
        "Kristian H. Kristensen" <hoegsberg@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org
Subject: [PATCH v2 12/24] drm/msm: avoid using 'timespec'

The timespec structure and associated interfaces are deprecated and will
be removed in the future because of the y2038 overflow.

The use of ktime_to_timespec() in timeout_to_jiffies() does not
suffer from that overflow, but is easy to avoid by just converting
the ktime_t into jiffies directly.

Reviewed-by: Jordan Crouse <jcrouse@...eaurora.org>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/gpu/drm/msm/msm_drv.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 71547e756e29..740bf7c70d8f 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -454,8 +454,7 @@ static inline unsigned long timeout_to_jiffies(const ktime_t *timeout)
 		remaining_jiffies = 0;
 	} else {
 		ktime_t rem = ktime_sub(*timeout, now);
-		struct timespec ts = ktime_to_timespec(rem);
-		remaining_jiffies = timespec_to_jiffies(&ts);
+		remaining_jiffies = ktime_divns(rem, NSEC_PER_SEC / HZ);
 	}
 
 	return remaining_jiffies;
-- 
2.20.0