All of lore.kernel.org
 help / color / mirror / Atom feed
From: tip-bot for Richard Cochran <richardcochran@gmail.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com,
	johnstul@us.ibm.com, richardcochran@gmail.com,
	tglx@linutronix.de
Subject: [tip:timers/core] posix-timer: Update comment
Date: Wed, 2 Feb 2011 22:03:28 GMT	[thread overview]
Message-ID: <tip-0061748dd2400d0bcd4d49d258db5d7b5d106ca0@git.kernel.org> (raw)
In-Reply-To: <20110201134419.487708516@linutronix.de>

Commit-ID:  0061748dd2400d0bcd4d49d258db5d7b5d106ca0
Gitweb:     http://git.kernel.org/tip/0061748dd2400d0bcd4d49d258db5d7b5d106ca0
Author:     Richard Cochran <richardcochran@gmail.com>
AuthorDate: Tue, 1 Feb 2011 13:52:15 +0000
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 2 Feb 2011 15:28:18 +0100

posix-timer: Update comment

Pick the cleanup to the comment in posix-timers.c from Richards all in
one conversion patch.

Originally-from: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <johnstul@us.ibm.com>
LKML-Reference: <20110201134419.487708516@linutronix.de>
---
 kernel/posix-timers.c |   25 +++++++------------------
 1 files changed, 7 insertions(+), 18 deletions(-)

diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index ad154df..a3fdfd4 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -102,11 +102,7 @@ static DEFINE_SPINLOCK(idr_lock);
 /*
  * CLOCKs: The POSIX standard calls for a couple of clocks and allows us
  *	    to implement others.  This structure defines the various
- *	    clocks and allows the possibility of adding others.	 We
- *	    provide an interface to add clocks to the table and expect
- *	    the "arch" code to add at least one clock that is high
- *	    resolution.	 Here we define the standard CLOCK_REALTIME as a
- *	    1/HZ resolution clock.
+ *	    clocks.
  *
  * RESOLUTION: Clock resolution is used to round up timer and interval
  *	    times, NOT to report clock times, which are reported with as
@@ -116,20 +112,13 @@ static DEFINE_SPINLOCK(idr_lock);
  *	    necessary code is written.	The standard says we should say
  *	    something about this issue in the documentation...
  *
- * FUNCTIONS: The CLOCKs structure defines possible functions to handle
- *	    various clock functions.  For clocks that use the standard
- *	    system timer code these entries should be NULL.  This will
- *	    allow dispatch without the overhead of indirect function
- *	    calls.  CLOCKS that depend on other sources (e.g. WWV or GPS)
- *	    must supply functions here, even if the function just returns
- *	    ENOSYS.  The standard POSIX timer management code assumes the
- *	    following: 1.) The k_itimer struct (sched.h) is used for the
- *	    timer.  2.) The list, it_lock, it_clock, it_id and it_pid
- *	    fields are not modified by timer code.
+ * FUNCTIONS: The CLOCKs structure defines possible functions to
+ *	    handle various clock functions.
  *
- *          At this time all functions EXCEPT clock_nanosleep can be
- *          redirected by the CLOCKS structure.  Clock_nanosleep is in
- *          there, but the code ignores it.
+ *	    The standard POSIX timer management code assumes the
+ *	    following: 1.) The k_itimer struct (sched.h) is used for
+ *	    the timer.  2.) The list, it_lock, it_clock, it_id and
+ *	    it_pid fields are not modified by timer code.
  *
  * Permissions: It is assumed that the clock_settime() function defined
  *	    for each clock will take care of permission checks.	 Some

  parent reply	other threads:[~2011-02-02 22:03 UTC|newest]

Thread overview: 111+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-01 13:50 [patch 00/28] Rework of the PTP support series core code Thomas Gleixner
2011-02-01 13:50 ` [patch 01/28] time: Correct the *settime* parameters Thomas Gleixner
2011-02-01 14:22   ` Thomas Gleixner
2011-02-01 20:32   ` john stultz
2011-02-02 21:54   ` [tip:timers/core] " tip-bot for Richard Cochran
2011-02-01 13:51 ` [patch 02/28] posix-timers: Define nanosleep not supported error separate Thomas Gleixner
2011-02-01 20:32   ` John Stultz
2011-02-02 21:55   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 03/28] posix-timers: Cleanup struct initializers Thomas Gleixner
2011-02-01 20:33   ` john stultz
2011-02-02 21:55   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 04/28] posix-timers: Introduce clock_posix_cpu Thomas Gleixner
2011-02-01 20:34   ` john stultz
2011-02-02 21:56   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 05/28] posix-timers: Introduce clockid_to_kclock() Thomas Gleixner
2011-02-01 20:37   ` john stultz
2011-02-02 21:56   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 06/28] posix-timers: Convert clock_nanosleep to clockid_to_kclock() Thomas Gleixner
2011-02-01 20:41   ` john stultz
2011-02-02 21:57   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 07/28] posix-timers: Convert clock_nanosleep_restart " Thomas Gleixner
2011-02-01 20:42   ` John Stultz
2011-02-01 20:46     ` Thomas Gleixner
2011-02-01 21:08       ` Thomas Gleixner
2011-02-02 21:57   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 08/28] posix-timers: Cleanup restart_block usage Thomas Gleixner
2011-02-01 21:11   ` john stultz
2011-02-01 21:14     ` Thomas Gleixner
2011-02-02 21:57   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 09/28] thread_info: Remove legacy arg0-3 from restart_block Thomas Gleixner
2011-02-01 21:11   ` john stultz
2011-02-02 21:58   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 10/28] posix-cpu-timers: Remove the stub nanosleep functions Thomas Gleixner
2011-02-01 21:14   ` John Stultz
2011-02-02 21:58   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 11/28] posix-timers: Convert clock_settime to clockid_to_kclock() Thomas Gleixner
2011-02-01 21:15   ` john stultz
2011-02-02 21:59   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 12/28] posix-timers: Convert clock_gettime() " Thomas Gleixner
2011-02-01 21:16   ` john stultz
2011-02-02  9:09   ` Richard Cochran
2011-02-02  9:55     ` Thomas Gleixner
2011-02-02 21:59   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 13/28] posix-timers: Convert clock_getres() " Thomas Gleixner
2011-02-01 21:17   ` john stultz
2011-02-02 22:00   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 14/28] posix-timers: Remove useless res field from k_clock Thomas Gleixner
2011-02-01 21:18   ` john stultz
2011-02-02 22:00   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:51 ` [patch 15/28] posix-timers: Convert timer_create() to clockid_to_kclock() Thomas Gleixner
2011-02-01 21:20   ` john stultz
2011-02-02 22:00   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:52 ` [patch 16/28] posix-timers: Convert timer_settime() " Thomas Gleixner
2011-02-01 21:22   ` John Stultz
2011-02-02 22:01   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:52 ` [patch 17/28] posix-timers: Convert timer_gettime() " Thomas Gleixner
2011-02-01 21:23   ` john stultz
2011-02-02 22:01   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:52 ` [patch 18/28] posix-timers: Convert timer_delete() " Thomas Gleixner
2011-02-01 21:24   ` john stultz
2011-02-02  8:29   ` Richard Cochran
2011-02-02  9:53     ` Thomas Gleixner
2011-02-02 22:02   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:52 ` [patch 19/28] posix-timers: Remove CLOCK_DISPATCH leftovers Thomas Gleixner
2011-02-01 21:25   ` john stultz
2011-02-02 22:02   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:52 ` [patch 20/28] posix-timers: Make posix-cpu-timers functions static Thomas Gleixner
2011-02-01 21:28   ` John Stultz
2011-02-01 21:33     ` Thomas Gleixner
2011-02-02 22:03   ` [tip:timers/core] " tip-bot for Thomas Gleixner
2011-02-01 13:52 ` [patch 21/28] posix-timer: Update comment Thomas Gleixner
2011-02-01 21:28   ` john stultz
2011-02-02 22:03   ` tip-bot for Richard Cochran [this message]
2011-02-01 13:52 ` [patch 22/28] time: Introduce timekeeping_inject_offset Thomas Gleixner
2011-02-02 22:03   ` [tip:timers/core] " tip-bot for John Stultz
2011-02-01 13:52 ` [patch 23/28] ntp: Add ADJ_SETOFFSET mode bit Thomas Gleixner
2011-02-01 21:30   ` john stultz
2011-02-01 13:52 ` [patch 24/28] posix-clocks: Splitout compat timex accessors Thomas Gleixner
2011-02-01 21:31   ` john stultz
2011-02-02 22:04   ` [tip:timers/core] time: " tip-bot for Richard Cochran
2011-02-01 13:52 ` [patch 25/28] posix clocks: Introduce a syscall for clock tuning Thomas Gleixner
2011-02-01 21:35   ` john stultz
2011-02-02 22:04   ` [tip:timers/core] posix-timers: " tip-bot for Richard Cochran
2011-02-01 13:52 ` [patch 26/28] posix_clocks: Add clock_adjtime for x86 Thomas Gleixner
2011-02-01 21:36   ` john stultz
2011-02-02 22:05   ` [tip:timers/core] x86: " tip-bot for Richard Cochran
2011-02-01 13:52 ` [patch 27/28] posix-timers: Add support for fd based clocks Thomas Gleixner
2011-02-01 21:38   ` john stultz
2011-02-02  9:19   ` Richard Cochran
2011-02-02 10:33     ` Thomas Gleixner
2011-02-02 22:05   ` [tip:timers/core] " tip-bot for Richard Cochran
2011-02-01 13:52 ` [patch 28/28] posix clocks: Introduce dynamic clocks Thomas Gleixner
2011-02-01 21:49   ` john stultz
2011-02-01 22:04     ` Thomas Gleixner
2011-02-02  7:50     ` Richard Cochran
2011-02-02 10:37       ` Thomas Gleixner
2011-02-02 11:25         ` Thomas Gleixner
2011-02-02 22:06           ` [tip:timers/core] posix-timers: Cleanup namespace tip-bot for Thomas Gleixner
2011-02-02 22:06   ` [tip:timers/core] posix clocks: Introduce dynamic clocks tip-bot for Richard Cochran
2011-03-03 14:50   ` [patch 28/28] " torbenh
2011-03-03 16:01     ` Richard Cochran
2011-03-03 17:07       ` torbenh
2011-03-04  6:05         ` Richard Cochran
2011-02-02  8:17 ` [patch 00/28] Rework of the PTP support series core code Richard Cochran
2011-02-02 13:53 ` Richard Cochran
2011-02-02 22:04 ` [tip:timers/core] ntp: Add ADJ_SETOFFSET mode bit tip-bot for Richard Cochran
2011-02-18  9:07   ` Richard Cochran
2011-02-18 16:07     ` [tip:timers/core] ntp: Remove redundant and incorrect parameter check tip-bot for Richard Cochran
2011-03-01 15:38 ` [patch 00/28] Rework of the PTP support series core code torbenh
2011-03-01 18:50   ` Richard Cochran
2011-03-02  9:41     ` torbenh

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=tip-0061748dd2400d0bcd4d49d258db5d7b5d106ca0@git.kernel.org \
    --to=richardcochran@gmail.com \
    --cc=hpa@zytor.com \
    --cc=johnstul@us.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-tip-commits@vger.kernel.org \
    --cc=mingo@redhat.com \
    --cc=tglx@linutronix.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.