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| author | David S. Miller <davem@davemloft.net> | 2018-10-21 22:38:56 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-10-22 17:42:10 -0700 |
| commit | 19832d244954189c851d8492718607a14734679c (patch) | |
| tree | 8099283c91e9180860d9abd92a60278289cd096d /arch/sparc/vdso | |
| parent | ecd4c19f3df7f3687867a2183934efb54a7d3c14 (diff) | |
| download | linux-19832d244954189c851d8492718607a14734679c.tar.bz2 | |
sparc: Several small VDSO vclock_gettime.c improvements.
Almost entirely borrowed from the x86 code.
Main improvement is to avoid having to initialize
ts->tv_nsec to zero before the sequence loops, by
expanding timespec_add_ns().
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/vdso')
| -rw-r--r-- | arch/sparc/vdso/vclock_gettime.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/sparc/vdso/vclock_gettime.c b/arch/sparc/vdso/vclock_gettime.c index 7b5bf63fc0f5..7b539ceebe13 100644 --- a/arch/sparc/vdso/vclock_gettime.c +++ b/arch/sparc/vdso/vclock_gettime.c @@ -138,7 +138,6 @@ notrace static __always_inline int do_realtime(struct vvar_data *vvar, unsigned long seq; u64 ns; - ts->tv_nsec = 0; do { seq = vvar_read_begin(vvar); ts->tv_sec = vvar->wall_time_sec; @@ -147,7 +146,8 @@ notrace static __always_inline int do_realtime(struct vvar_data *vvar, ns >>= vvar->clock.shift; } while (unlikely(vvar_read_retry(vvar, seq))); - timespec_add_ns(ts, ns); + ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns); + ts->tv_nsec = ns; return 0; } @@ -158,7 +158,6 @@ notrace static __always_inline int do_monotonic(struct vvar_data *vvar, unsigned long seq; u64 ns; - ts->tv_nsec = 0; do { seq = vvar_read_begin(vvar); ts->tv_sec = vvar->monotonic_time_sec; @@ -167,7 +166,8 @@ notrace static __always_inline int do_monotonic(struct vvar_data *vvar, ns >>= vvar->clock.shift; } while (unlikely(vvar_read_retry(vvar, seq))); - timespec_add_ns(ts, ns); + ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns); + ts->tv_nsec = ns; return 0; } |