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author | Thomas Gleixner <tglx@linutronix.de> | 2008-10-22 09:48:06 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2008-10-22 09:48:06 +0200 |
commit | 268a3dcfea2077fca60d3715caa5c96f9b5e6ea7 (patch) | |
tree | c2232774508424e677e27f296090a68c775e4669 /kernel/time.c | |
parent | c4bd822e7b12a9008241d76db45b665f2fef180c (diff) | |
parent | 592aa999d6a272856c9bfbdaac0cfba1bb37c24c (diff) | |
download | op-kernel-dev-268a3dcfea2077fca60d3715caa5c96f9b5e6ea7.zip op-kernel-dev-268a3dcfea2077fca60d3715caa5c96f9b5e6ea7.tar.gz |
Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2
Conflicts:
kernel/time/tick-sched.c
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/time.c')
-rw-r--r-- | kernel/time.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/time.c b/kernel/time.c index 6a08660..d63a433 100644 --- a/kernel/time.c +++ b/kernel/time.c @@ -669,3 +669,21 @@ EXPORT_SYMBOL(get_jiffies_64); #endif EXPORT_SYMBOL(jiffies); + +/* + * Add two timespec values and do a safety check for overflow. + * It's assumed that both values are valid (>= 0) + */ +struct timespec timespec_add_safe(const struct timespec lhs, + const struct timespec rhs) +{ + struct timespec res; + + set_normalized_timespec(&res, lhs.tv_sec + rhs.tv_sec, + lhs.tv_nsec + rhs.tv_nsec); + + if (res.tv_sec < lhs.tv_sec || res.tv_sec < rhs.tv_sec) + res.tv_sec = TIME_T_MAX; + + return res; +} |