Files
erofs-linux/arch/s390/kernel/vdso64
Vincenzo Frascino 478237a595 s390/vdso: fix vDSO clock_getres()
clock_getres in the vDSO library has to preserve the same behaviour
of posix_get_hrtimer_res().

In particular, posix_get_hrtimer_res() does:
    sec = 0;
    ns = hrtimer_resolution;
and hrtimer_resolution depends on the enablement of the high
resolution timers that can happen either at compile or at run time.

Fix the s390 vdso implementation of clock_getres keeping a copy of
hrtimer_resolution in vdso data and using that directly.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Vincenzo Frascino <[email protected]>
Acked-by: Martin Schwidefsky <[email protected]>
[[email protected]: use llgf for proper zero extension]
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
2020-06-16 13:44:05 +02:00
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