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authorThomas Gleixner <tglx@linutronix.de>2008-02-13 09:20:43 +0100
committerThomas Gleixner <tglx@linutronix.de>2008-02-14 22:08:30 +0100
commit5a7780e725d1bb4c3094fcc12f1c5c5faea1e988 (patch)
tree50fc5cde427f3854d0b84ba1037fef3fb4693e11 /include/linux/ktime.h
parente760e716d47b48caf98da348368fd41b4a9b9e7e (diff)
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hrtimer: check relative timeouts for overflow
Various user space callers ask for relative timeouts. While we fixed that overflow issue in hrtimer_start(), the sites which convert relative user space values to absolute timeouts themself were uncovered. Instead of putting overflow checks into each place add a function which does the sanity checking and convert all affected callers to use it. Thanks to Frans Pop, who reported the problem and tested the fixes. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu> Tested-by: Frans Pop <elendil@planet.nl>
Diffstat (limited to 'include/linux/ktime.h')
-rw-r--r--include/linux/ktime.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index 36c542b..2cd7fa7 100644
--- a/include/linux/ktime.h
+++ b/include/linux/ktime.h
@@ -310,6 +310,8 @@ static inline ktime_t ktime_sub_us(const ktime_t kt, const u64 usec)
return ktime_sub_ns(kt, usec * 1000);
}
+extern ktime_t ktime_add_safe(const ktime_t lhs, const ktime_t rhs);
+
/*
* The resolution of the clocks. The resolution value is returned in
* the clock_getres() system call to give application programmers an
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