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author | 2019-10-24 22:53:19 +0200 | |
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committer | 2019-12-18 18:07:33 +0100 | |
commit | 751addac78b6f205ffd47c8736ca6d429dc77703 (patch) | |
tree | 08e5150e247238f02064166c467b9a648a43a44e /kernel/time/time.c | |
parent | nfs: fscache: use timespec64 in inode auxdata (diff) | |
download | linux-751addac78b6f205ffd47c8736ca6d429dc77703.tar.gz linux-751addac78b6f205ffd47c8736ca6d429dc77703.tar.bz2 linux-751addac78b6f205ffd47c8736ca6d429dc77703.zip |
y2038: remove obsolete jiffies conversion functions
Now that the last user of timespec_to_jiffies() is gone, these
can just be removed, everything else is using ktime_t or timespec64
already.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'kernel/time/time.c')
-rw-r--r-- | kernel/time/time.c | 58 |
1 files changed, 5 insertions, 53 deletions
diff --git a/kernel/time/time.c b/kernel/time/time.c index 704ccd9451b0..cdd7386115ff 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -626,10 +626,12 @@ EXPORT_SYMBOL(__usecs_to_jiffies); * The >> (NSEC_JIFFIE_SC - SEC_JIFFIE_SC) converts the scaled nsec * value to a scaled second value. */ -static unsigned long -__timespec64_to_jiffies(u64 sec, long nsec) + +unsigned long +timespec64_to_jiffies(const struct timespec64 *value) { - nsec = nsec + TICK_NSEC - 1; + u64 sec = value->tv_sec; + long nsec = value->tv_nsec + TICK_NSEC - 1; if (sec >= MAX_SEC_IN_JIFFIES){ sec = MAX_SEC_IN_JIFFIES; @@ -640,18 +642,6 @@ __timespec64_to_jiffies(u64 sec, long nsec) (NSEC_JIFFIE_SC - SEC_JIFFIE_SC))) >> SEC_JIFFIE_SC; } - -static unsigned long -__timespec_to_jiffies(unsigned long sec, long nsec) -{ - return __timespec64_to_jiffies((u64)sec, nsec); -} - -unsigned long -timespec64_to_jiffies(const struct timespec64 *value) -{ - return __timespec64_to_jiffies(value->tv_sec, value->tv_nsec); -} EXPORT_SYMBOL(timespec64_to_jiffies); void @@ -669,44 +659,6 @@ jiffies_to_timespec64(const unsigned long jiffies, struct timespec64 *value) EXPORT_SYMBOL(jiffies_to_timespec64); /* - * We could use a similar algorithm to timespec_to_jiffies (with a - * different multiplier for usec instead of nsec). But this has a - * problem with rounding: we can't exactly add TICK_NSEC - 1 to the - * usec value, since it's not necessarily integral. - * - * We could instead round in the intermediate scaled representation - * (i.e. in units of 1/2^(large scale) jiffies) but that's also - * perilous: the scaling introduces a small positive error, which - * combined with a division-rounding-upward (i.e. adding 2^(scale) - 1 - * units to the intermediate before shifting) leads to accidental - * overflow and overestimates. - * - * At the cost of one additional multiplication by a constant, just - * use the timespec implementation. - */ -unsigned long -timeval_to_jiffies(const struct timeval *value) -{ - return __timespec_to_jiffies(value->tv_sec, - value->tv_usec * NSEC_PER_USEC); -} -EXPORT_SYMBOL(timeval_to_jiffies); - -void jiffies_to_timeval(const unsigned long jiffies, struct timeval *value) -{ - /* - * Convert jiffies to nanoseconds and separate with - * one divide. - */ - u32 rem; - - value->tv_sec = div_u64_rem((u64)jiffies * TICK_NSEC, - NSEC_PER_SEC, &rem); - value->tv_usec = rem / NSEC_PER_USEC; -} -EXPORT_SYMBOL(jiffies_to_timeval); - -/* * Convert jiffies/jiffies_64 to clock_t and back. */ clock_t jiffies_to_clock_t(unsigned long x) |