From d72c129e9f3b79a248c91178052e75c429cfbc53 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Sun, 5 Jul 2009 08:58:25 +0000 Subject: Compatibility layer for hrtimer API From: Jean Delvare Kernels 2.6.22 to 2.6.24 (inclusive) need some compatibility quirks for the hrtimer API. For older kernels, some required functions were not exported so there's nothing we can do. This means that drivers using the hrtimer infrastructure will no longer work for kernels older than 2.6.22. Signed-off-by: Jean Delvare Signed-off-by: Mauro Carvalho Chehab --- v4l/compat.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/v4l/compat.h b/v4l/compat.h index 11dc57109..e73f03087 100644 --- a/v4l/compat.h +++ b/v4l/compat.h @@ -480,4 +480,23 @@ static inline unsigned long v4l_compat_fls(unsigned long x) } #endif +/* + * Compatibility code for hrtimer API + * This will make hrtimer usable for kernels 2.6.22 and later. + * For earlier kernels, not all required functions are exported + * so there's nothing we can do. + */ + +#ifdef _LINUX_HRTIMER_H +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25) && \ + LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 22) +/* Forward a hrtimer so it expires after the hrtimer's current now */ +static inline unsigned long hrtimer_forward_now(struct hrtimer *timer, + ktime_t interval) +{ + return hrtimer_forward(timer, timer->base->get_time(), interval); +} +#endif +#endif /* _LINUX_HRTIMER_H */ + #endif /* _COMPAT_H */ -- cgit v1.2.3