linux/kernel/entry
Mark Rutland 4624a14f4d sched/preempt: Simplify irqentry_exit_cond_resched() callers
Currently callers of irqentry_exit_cond_resched() need to be aware of
whether the function should be indirected via a static call, leading to
ugly ifdeffery in callers.

Save them the hassle with a static inline wrapper that does the right
thing. The raw_irqentry_exit_cond_resched() will also be useful in
subsequent patches which will add conditional wrappers for preemption
functions.

Note: in arch/x86/entry/common.c, xen_pv_evtchn_do_upcall() always calls
irqentry_exit_cond_resched() directly, even when PREEMPT_DYNAMIC is in
use. I believe this is a latent bug (which this patch corrects), but I'm
not entirely certain this wasn't deliberate.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20220214165216.2231574-4-mark.rutland@arm.com
2022-02-19 11:11:08 +01:00
..
common.c sched/preempt: Simplify irqentry_exit_cond_resched() callers 2022-02-19 11:11:08 +01:00
common.h kernel: Implement selective syscall userspace redirection 2020-12-02 15:07:56 +01:00
kvm.c entry: Snapshot thread flags 2021-12-01 00:06:43 +01:00
Makefile kernel: Implement selective syscall userspace redirection 2020-12-02 15:07:56 +01:00
syscall_user_dispatch.c signal: Replace force_fatal_sig with force_exit_sig when in doubt 2021-11-19 09:15:58 -06:00