From: Arnd Bergmann <arnd@arndb.de>
To: Anchal Jain <anchalj109@gmail.com>
Cc: outreachy-kernel@googlegroups.com, gregkh@linuxfoundation.org,
lidza.louina@gmail.com
Subject: Re: [Outreachy kernel] [PATCH] staging: dgnc: dgnc_cls.c: usleep_range is preferred over udelay
Date: Tue, 13 Sep 2016 12:36:00 +0200 [thread overview]
Message-ID: <5166979.RvC7fNVv5n@wuerfel> (raw)
In-Reply-To: <CAAbeOSv0+HCx28Ug1eqEnFsEjT3sMuP6aMUR+J2G_gKFuYYcaw@mail.gmail.com>
On Tuesday, September 13, 2016 1:54:57 PM CEST Anchal Jain wrote:
> > This gets called from cls_copy_data_from_queue_to_uart() under a spinlock.
>
> According to the documentation "Documentation/timers/timers-howto.txt".
> In this documentation no explanation of "spinlock". What is that meaning?
Holding a spinlock is one of the things that imply "atomic context",
which is mentioned there. Other examples would be
- being called from an interrupt handler
- disabling interrupts
- disabling preemption
Arnd
next prev parent reply other threads:[~2016-09-13 10:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-13 7:52 [PATCH] staging: dgnc: dgnc_cls.c: usleep_range is preferred over udelay Anchal Jain
2016-09-13 7:58 ` [Outreachy kernel] " Julia Lawall
2016-09-13 7:58 ` Arnd Bergmann
2016-09-13 8:24 ` Anchal Jain
2016-09-13 9:47 ` Julia Lawall
2016-09-13 10:36 ` Arnd Bergmann [this message]
2016-09-13 10:45 ` Anchal Jain
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