diff options
Diffstat (limited to 'arch/parisc/kernel/time.c')
| -rw-r--r-- | arch/parisc/kernel/time.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c index 594930bc4bcf..5facc9bff4ef 100644 --- a/arch/parisc/kernel/time.c +++ b/arch/parisc/kernel/time.c @@ -10,7 +10,6 @@ * 1998-12-20 Updated NTP code according to technical memorandum Jan '96 * "A Kernel Model for Precision Timekeeping" by Dave Mills */ -#include <linux/config.h> #include <linux/errno.h> #include <linux/module.h> #include <linux/sched.h> @@ -157,8 +156,22 @@ do_gettimeofday (struct timeval *tv) usec += (xtime.tv_nsec / 1000); } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); - while (usec >= 1000000) { - usec -= 1000000; + if (unlikely(usec > LONG_MAX)) { + /* This can happen if the gettimeoffset adjustment is + * negative and xtime.tv_nsec is smaller than the + * adjustment */ + printk(KERN_ERR "do_gettimeofday() spurious xtime.tv_nsec of %ld\n", usec); + usec += USEC_PER_SEC; + --sec; + /* This should never happen, it means the negative + * time adjustment was more than a second, so there's + * something seriously wrong */ + BUG_ON(usec > LONG_MAX); + } + + + while (usec >= USEC_PER_SEC) { + usec -= USEC_PER_SEC; ++sec; } |