diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-12-31 08:31:57 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-12-31 08:31:57 +0100 |
commit | a9de18eb761f7c1c860964b2e5addc1a35c7e861 (patch) | |
tree | 886e75fdfd09690cd262ca69cb7f5d1d42b48602 /kernel/time.c | |
parent | b2aaf8f74cdc84a9182f6cabf198b7763bcb9d40 (diff) | |
parent | 6a94cb73064c952255336cc57731904174b2c58f (diff) |
Merge branch 'linus' into stackprotector
Conflicts:
arch/x86/include/asm/pda.h
kernel/fork.c
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 6a08660b4fa..d63a4336fad 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; +} |