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| author | Patrick Pannuto <ppannuto@codeaurora.org> | 2010-08-02 15:01:05 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2010-08-04 11:00:45 +0200 |
| commit | 0fcb80818bc3ade5befd409051089f710adcf7b0 (patch) | |
| tree | 697c264a996c5cfb1360d1d59e495c5c459e8dd0 /kernel/timer.c | |
| parent | 5e7f5a178bba45c5aca3448fddecabd4e28f1f6b (diff) | |
| download | kernel_samsung_smdk4412-0fcb80818bc3ade5befd409051089f710adcf7b0.zip kernel_samsung_smdk4412-0fcb80818bc3ade5befd409051089f710adcf7b0.tar.gz kernel_samsung_smdk4412-0fcb80818bc3ade5befd409051089f710adcf7b0.tar.bz2 | |
Documentation: Add timers/timers-howto.txt
This file seeks to explain the nuances in various delays;
many driver writers are not necessarily familiar with the
various kernel timers, their shortfalls, and quirks. When
faced with
ndelay, udelay, mdelay, usleep_range, msleep, and msleep_interrubtible
the question "How do I just wait 1 ms for my hardware to
latch?" has the non-intuitive "best" answer:
usleep_range(1000,1500)
This patch is followed by a series of checkpatch additions
that seek to help kernel hackers pick the best delay.
Signed-off-by: Patrick Pannuto <ppannuto@codeaurora.org>
Cc: apw@canonical.com
Cc: corbet@lwn.net
Cc: arjan@linux.intel.com
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <1280786467-26999-3-git-send-email-ppannuto@codeaurora.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/timer.c')
0 files changed, 0 insertions, 0 deletions