linux-kernel - [PATCH 5.4 72/77] lib/vdso: Let do_coarse() return 0 to simplify the callsite

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Date:   Fri,  2 Sep 2022 14:19:21 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Christophe Leroy <christophe.leroy@....fr>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 72/77] lib/vdso: Let do_coarse() return 0 to simplify the callsite

From: Christophe Leroy <christophe.leroy@....fr>

[ Upstream commit 8463cf80529d0fd80b84cd5ab8b9b952b01c7eb9 ]

do_coarse() is similar to do_hres() except that it never fails.

Change its type to int instead of void and let it always return success (0)
to simplify the call site.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lore.kernel.org/r/21e8afa38c02ca8672c2690307383507fe63b454.1577111367.git.christophe.leroy@c-s.fr
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 lib/vdso/gettimeofday.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c
index 45f57fd2db649..c549e72758aa0 100644
--- a/lib/vdso/gettimeofday.c
+++ b/lib/vdso/gettimeofday.c
@@ -68,7 +68,7 @@ static int do_hres(const struct vdso_data *vd, clockid_t clk,
 	return 0;
 }
 
-static void do_coarse(const struct vdso_data *vd, clockid_t clk,
+static int do_coarse(const struct vdso_data *vd, clockid_t clk,
 		      struct __kernel_timespec *ts)
 {
 	const struct vdso_timestamp *vdso_ts = &vd->basetime[clk];
@@ -79,6 +79,8 @@ static void do_coarse(const struct vdso_data *vd, clockid_t clk,
 		ts->tv_sec = vdso_ts->sec;
 		ts->tv_nsec = vdso_ts->nsec;
 	} while (unlikely(vdso_read_retry(vd, seq)));
+
+	return 0;
 }
 
 static __maybe_unused int
@@ -96,14 +98,13 @@ __cvdso_clock_gettime_common(clockid_t clock, struct __kernel_timespec *ts)
 	 * clocks are handled in the VDSO directly.
 	 */
 	msk = 1U << clock;
-	if (likely(msk & VDSO_HRES)) {
+	if (likely(msk & VDSO_HRES))
 		return do_hres(&vd[CS_HRES_COARSE], clock, ts);
-	} else if (msk & VDSO_COARSE) {
-		do_coarse(&vd[CS_HRES_COARSE], clock, ts);
-		return 0;
-	} else if (msk & VDSO_RAW) {
+	else if (msk & VDSO_COARSE)
+		return do_coarse(&vd[CS_HRES_COARSE], clock, ts);
+	else if (msk & VDSO_RAW)
 		return do_hres(&vd[CS_RAW], clock, ts);
-	}
+
 	return -1;
 }
 
-- 
2.35.1