Messages in this thread Patch in this message | | | From | Mark Salyzyn <> | Subject | [PATCH v2 7/10] arm: vdso: add support for clock_getres | Date | Thu, 12 Oct 2017 16:00:40 -0700 |
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Add clock_getres vdso support to match up with existing support in the arcm64's vdso.
Signed-off-by: Mark Salyzyn <salyzyn@android.com>
v2: split first CL into 7 of 7 pieces --- arch/arm/kernel/vdso.c | 1 + arch/arm/vdso/vdso.lds.S | 1 + arch/arm/vdso/vgettimeofday.c | 23 +++++++++++++++++++++++ 3 files changed, 25 insertions(+)
diff --git a/arch/arm/kernel/vdso.c b/arch/arm/kernel/vdso.c index 7377638a3b00..287424541f3a 100644 --- a/arch/arm/kernel/vdso.c +++ b/arch/arm/kernel/vdso.c @@ -189,6 +189,7 @@ static void __init patch_vdso(void *ehdr) if (!cntvct_ok) { vdso_nullpatch_one(&einfo, "__vdso_gettimeofday"); vdso_nullpatch_one(&einfo, "__vdso_clock_gettime"); + vdso_nullpatch_one(&einfo, "__vdso_clock_getres"); } } diff --git a/arch/arm/vdso/vdso.lds.S b/arch/arm/vdso/vdso.lds.S index 89ca89f12d23..1d81e8c3acf6 100644 --- a/arch/arm/vdso/vdso.lds.S +++ b/arch/arm/vdso/vdso.lds.S @@ -82,6 +82,7 @@ VERSION global: __vdso_clock_gettime; __vdso_gettimeofday; + __vdso_clock_getres; local: *; }; } diff --git a/arch/arm/vdso/vgettimeofday.c b/arch/arm/vdso/vgettimeofday.c index b374c143d53e..841e7fd74a1b 100644 --- a/arch/arm/vdso/vgettimeofday.c +++ b/arch/arm/vdso/vgettimeofday.c @@ -31,6 +31,7 @@ DEFINE_FALLBACK(gettimeofday, struct timeval *, tv, struct timezone *, tz) DEFINE_FALLBACK(clock_gettime, clockid_t, clock, struct timespec *, ts) +DEFINE_FALLBACK(clock_getres, clockid_t, clock, struct timespec *, ts) static notrace u32 vdso_read_begin(const struct vdso_data *vd) { @@ -320,3 +321,25 @@ notrace int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz) return 0; } + +int __vdso_clock_getres(clockid_t clock_id, struct timespec *res) +{ + typeof(res->tv_nsec) nsec; + + if (clock_id == CLOCK_REALTIME || + clock_id == CLOCK_MONOTONIC || + clock_id == CLOCK_MONOTONIC_RAW) + nsec = MONOTONIC_RES_NSEC; + else if (clock_id == CLOCK_REALTIME_COARSE || + clock_id == CLOCK_MONOTONIC_COARSE) + nsec = LOW_RES_NSEC; + else + return clock_getres_fallback(clock_id, res); + + if (likely(res != NULL)) { + res->tv_sec = 0; + res->tv_nsec = nsec; + } + + return 0; +} -- 2.15.0.rc0.271.g36b669edcc-goog
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