diff options
| author | Roman Zippel <zippel@linux-m68k.org> | 2008-05-01 04:34:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-01 08:03:58 -0700 |
| commit | f8bd2258e2d520dff28c855658bd24bdafb5102d (patch) | |
| tree | d76db1dc858cb316bc7d5b8473f690a753fd2c93 /drivers/char/mmtimer.c | |
| parent | 6f6d6a1a6a1336431a6cba60ace9e97c3a496a19 (diff) | |
remove div_long_long_rem
x86 is the only arch right now, which provides an optimized for
div_long_long_rem and it has the downside that one has to be very careful that
the divide doesn't overflow.
The API is a little akward, as the arguments for the unsigned divide are
signed. The signed version also doesn't handle a negative divisor and
produces worse code on 64bit archs.
There is little incentive to keep this API alive, so this converts the few
users to the new API.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/mmtimer.c')
| -rw-r--r-- | drivers/char/mmtimer.c | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/drivers/char/mmtimer.c b/drivers/char/mmtimer.c index d83db5d880e0..192961fd7173 100644 --- a/drivers/char/mmtimer.c +++ b/drivers/char/mmtimer.c @@ -30,6 +30,8 @@ #include <linux/miscdevice.h> #include <linux/posix-timers.h> #include <linux/interrupt.h> +#include <linux/time.h> +#include <linux/math64.h> #include <asm/uaccess.h> #include <asm/sn/addrs.h> @@ -472,8 +474,8 @@ static int sgi_clock_get(clockid_t clockid, struct timespec *tp) nsec = rtc_time() * sgi_clock_period + sgi_clock_offset.tv_nsec; - tp->tv_sec = div_long_long_rem(nsec, NSEC_PER_SEC, &tp->tv_nsec) - + sgi_clock_offset.tv_sec; + *tp = ns_to_timespec(nsec); + tp->tv_sec += sgi_clock_offset.tv_sec; return 0; }; @@ -481,11 +483,11 @@ static int sgi_clock_set(clockid_t clockid, struct timespec *tp) { u64 nsec; - u64 rem; + u32 rem; nsec = rtc_time() * sgi_clock_period; - sgi_clock_offset.tv_sec = tp->tv_sec - div_long_long_rem(nsec, NSEC_PER_SEC, &rem); + sgi_clock_offset.tv_sec = tp->tv_sec - div_u64_rem(nsec, NSEC_PER_SEC, &rem); if (rem <= tp->tv_nsec) sgi_clock_offset.tv_nsec = tp->tv_sec - rem; @@ -644,9 +646,6 @@ static int sgi_timer_del(struct k_itimer *timr) return 0; } -#define timespec_to_ns(x) ((x).tv_nsec + (x).tv_sec * NSEC_PER_SEC) -#define ns_to_timespec(ts, nsec) (ts).tv_sec = div_long_long_rem(nsec, NSEC_PER_SEC, &(ts).tv_nsec) - /* Assumption: it_lock is already held with irq's disabled */ static void sgi_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting) { @@ -659,9 +658,8 @@ static void sgi_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting) return; } - ns_to_timespec(cur_setting->it_interval, timr->it.mmtimer.incr * sgi_clock_period); - ns_to_timespec(cur_setting->it_value, (timr->it.mmtimer.expires - rtc_time())* sgi_clock_period); - return; + cur_setting->it_interval = ns_to_timespec(timr->it.mmtimer.incr * sgi_clock_period); + cur_setting->it_value = ns_to_timespec((timr->it.mmtimer.expires - rtc_time()) * sgi_clock_period); } @@ -679,8 +677,8 @@ static int sgi_timer_set(struct k_itimer *timr, int flags, sgi_timer_get(timr, old_setting); sgi_timer_del(timr); - when = timespec_to_ns(new_setting->it_value); - period = timespec_to_ns(new_setting->it_interval); + when = timespec_to_ns(&new_setting->it_value); + period = timespec_to_ns(&new_setting->it_interval); if (when == 0) /* Clear timer */ @@ -695,7 +693,7 @@ static int sgi_timer_set(struct k_itimer *timr, int flags, unsigned long now; getnstimeofday(&n); - now = timespec_to_ns(n); + now = timespec_to_ns(&n); if (when > now) when -= now; else |