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Subject[tip: timers/core] lib/vdso: Let do_coarse() return 0 to simplify the callsite
The following commit has been merged into the timers/core branch of tip:

Commit-ID: 8463cf80529d0fd80b84cd5ab8b9b952b01c7eb9
Gitweb: https://git.kernel.org/tip/8463cf80529d0fd80b84cd5ab8b9b952b01c7eb9
Author: Christophe Leroy <christophe.leroy@c-s.fr>
AuthorDate: Mon, 23 Dec 2019 14:31:07
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Tue, 14 Jan 2020 12:20:46 +01:00

lib/vdso: Let do_coarse() return 0 to simplify the callsite

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@c-s.fr>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/21e8afa38c02ca8672c2690307383507fe63b454.1577111367.git.christophe.leroy@c-s.fr


---
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 b676a98..5a5ec89 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;
}

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