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authorDavid S. Miller <davem@davemloft.net>2018-10-21 22:38:56 -0700
committerDavid S. Miller <davem@davemloft.net>2018-10-22 17:42:10 -0700
commit19832d244954189c851d8492718607a14734679c (patch)
tree8099283c91e9180860d9abd92a60278289cd096d /arch/sparc/vdso
parentecd4c19f3df7f3687867a2183934efb54a7d3c14 (diff)
downloadlinux-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.c8
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;
}