lkml.org 
[lkml]   [2019]   [May]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH 0/2] hwspinlock: add the 'in_atomic' API
Date
Hi


Gentle reminder


Fabien

On 07/03/2019 4:58 PM, Fabien Dessenne wrote:
> In its current implementation, the hwspinlock framework relies on jiffies
> to handle the timeout of the hwspin_lock_timeout_xxx() API.
> In an atomic context (or more precisely when irq are disabled) jiffies does not
> increase, which prevents the timeout to reach its target value (infinite loop).
>
> Note that there is already an hwspinlock user that runs in atomic context
> (drivers/irqchip/irq-stm32-exti.c) and that has to handle by itself the
> timeout.
>
> The first patch of the series completes the Documentation (the 'raw' API
> is not documented), and the second patch provides with the 'in_atomic' API.
>
> Fabien Dessenne (2):
> hwspinlock: document the hwspinlock 'raw' API
> hwspinlock: add the 'in_atomic' API
>
> Documentation/hwspinlock.txt | 81 ++++++++++++++++++++++++++++++++++++
> drivers/hwspinlock/hwspinlock_core.c | 43 +++++++++++++------
> include/linux/hwspinlock.h | 61 +++++++++++++++++++++++++--
> 3 files changed, 169 insertions(+), 16 deletions(-)
>
\
 
 \ /
  Last update: 2019-05-13 11:11    [W:0.228 / U:0.020 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site