On Thu 07 Mar 07:58 PST 2019, 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. > Applied Thanks, Bjorn > 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(-) > > -- > 2.7.4 >
