linux

iv/linux

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Sebastian Andrzej Siewior 701454bce9 auxdisplay: Remove in_interrupt() usage.

charlcd_write() is invoked as a VFS->write() callback and as such it is
always invoked from preemptible context and may sleep.

charlcd_puts() is invoked from register/unregister callback which is
preemptible. The reboot notifier callback is also invoked from
preemptible context.

Therefore there is no need to use in_interrupt() to figure out if it
is safe to sleep because it always is. in_interrupt() and related
context checks are being removed from non-core code.
Using schedule() to schedule (and be friendly to others) is
discouraged and cond_resched() should be used instead.

Remove in_interrupt() and use cond_resched() to schedule every 32
iterations if needed.

Link: https://lkml.kernel.org/r/20200914204209.256266093@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
[mo: fixed a couple typos in comment and commit message]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

2021-03-16 16:32:40 +01:00

arm-charlcd.c

auxdisplay: Replace HTTP links with HTTPS ones

2020-08-08 16:10:03 +02:00

cfag12864b.c

treewide: Miguel has moved

2021-02-26 09:41:03 -08:00

cfag12864bfb.c

treewide: Miguel has moved

2021-02-26 09:41:03 -08:00

charlcd.c

auxdisplay: Remove in_interrupt() usage.