Not all architectures have the system calls for time() and gettimeofday(). When the system call is missing, the vDSO function should also not be present.
Validate that. Signed-off-by: Thomas Weißschuh <[email protected]> --- lib/vdso/gettimeofday.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c index e0f289d3d110..b8c1fc85eb74 100644 --- a/lib/vdso/gettimeofday.c +++ b/lib/vdso/gettimeofday.c @@ -12,6 +12,8 @@ #include <vdso/time32.h> #include <vdso/time64.h> +#include <uapi/linux/unistd.h> + /* * The generic vDSO implementation requires that gettimeofday.h * provides: @@ -348,6 +350,10 @@ __cvdso_gettimeofday_data(const struct vdso_time_data *vd, { const struct vdso_clock *vc = vd->clock_data; +#ifndef __NR_gettimeofday + BUILD_BUG(); +#endif + if (likely(tv != NULL)) { struct __kernel_timespec ts; @@ -382,6 +388,10 @@ __cvdso_time_data(const struct vdso_time_data *vd, __kernel_old_time_t *time) const struct vdso_clock *vc = vd->clock_data; __kernel_old_time_t t; +#ifndef __NR_time + BUILD_BUG(); +#endif + if (vdso_is_timens_clock(vc)) { vd = vdso_timens_data(vd); vc = vd->clock_data; -- 2.55.0
