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Commit 19832d24 authored by David S. Miller's avatar David S. Miller
Browse files

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: default avatarDavid S. Miller <davem@davemloft.net>
parent ecd4c19f

arch/sparc/vdso/vclock_gettime.c

+4 −4
Original line number Diff line number Diff line
@@ -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;

}