user/sven/linux.git/include/linux/ktime.h, branch v3.2.78

time: Improve sanity checking of timekeeping inputs

2012-09-19T14:04:59Z

This is a -stable backport of 4e8b14526ca7fb046a81c94002c1c43b6fdf0e9b Unexpected behavior could occur if the time is set to a value large enough to overflow a 64bit ktime_t (which is something larger then the year 2262). Also unexpected behavior could occur if large negative offsets are injected via adjtimex. So this patch improves the sanity check timekeeping inputs by improving the timespec_valid() check, and then makes better use of timespec_valid() to make sure we don't set the time to an invalid negative value or one that overflows ktime_t. Note: This does not protect from setting the time close to overflowing ktime_t and then letting natural accumulation cause the overflow. Reported-by: CAI Qian Reported-by: Sasha Levin Signed-off-by: John Stultz Cc: Peter Zijlstra Cc: Prarit Bhargava Cc: Zhouping Liu Cc: Ingo Molnar Link: http://lkml.kernel.org/r/1344454580-17031-1-git-send-email-john.stultz@linaro.org Signed-off-by: Thomas Gleixner Cc: Linux Kernel Signed-off-by: John Stultz

Fix common misspellings

2011-03-31T14:26:23Z

Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi

ktime: introduce ktime_to_ms()

2010-05-14T19:09:32Z

To report ktime statistics to user space in milliseconds, a new helper is required. When considering how to do this conversion, I didn't immediately see why the extra step of converting ktime to a timeval was needed. To make that more clear, introduce a couple of large comments. Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust

time: add ns_to_ktime()

2008-04-19T17:44:57Z

Signed-off-by: Ingo Molnar

hrtimer: check relative timeouts for overflow

2008-02-14T21:08:30Z

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 Acked-by: Ingo Molnar Tested-by: Frans Pop

Fix compilation of powerpc asm-offsets.c with old gcc

2008-02-07T22:54:45Z

Commit ad7f71674ad7c3c4467e48f6ab9e85516dae2720 ("[POWERPC] Use a sensible default for clock_getres() in the VDSO") corrected the clock resolution reported by the VDSO clock_getres() but introduced another problem in that older versions of gcc (gcc-4.0 and earlier) fail to compile the new code in arch/powerpc/kernel/asm-offsets.c. This fixes it by introducing a new MONOTONIC_RES_NSEC define in the generic code which is equivalent to KTIME_MONOTONIC_RES but is just an integer constant, not a ktime union. Signed-off-by: Tony Breeds Signed-off-by: Paul Mackerras Signed-off-by: Linus Torvalds

[KTIME]: Introduce ktime_sub_ns and ktime_sub_us

2007-10-10T23:48:12Z

First user will be the DCCP transport networking protocol. Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller

[KTIME]: Introduce ktime_add_us

2007-07-11T05:15:26Z

Signed-off-by: Arnaldo Carvalho de Melo

[KTIME]: Introduce ktime_us_delta

2007-07-11T05:15:25Z

This provides a reusable time difference function which returns the difference in microseconds, as often used in the DCCP code. Commiter note: renamed ktime_delta to ktime_us_delta and put it in ktime.h. Signed-off-by: Gerrit Renker Signed-off-by: Arnaldo Carvalho de Melo

[TCP]: Congestion control API RTT sampling fix

2007-06-15T22:08:43Z

Commit 164891aadf1721fca4dce473bb0e0998181537c6 broke RTT sampling of congestion control modules. Inaccurate timestamps could be fed to them without providing any way for them to identify such cases. Previously RTT sampler was called only if FLAG_RETRANS_DATA_ACKED was not set filtering inaccurate timestamps nicely. In addition, the new behavior could give an invalid timestamp (zero) to RTT sampler if only skbs with TCPCB_RETRANS were ACKed. This solves both problems. Signed-off-by: Ilpo Järvinen Signed-off-by: David S. Miller