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sched: Change task_struct::state

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Change the type and name of task_struct::state. Drop the volatile and
shrink it to an 'unsigned int'. Rename it in order to find all uses
such that we can use READ_ONCE/WRITE_ONCE as appropriate.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Link: https://lore.kernel.org/r/20210611082838.550736351@infradead.org
This commit is contained in:
Peter Zijlstra
2021-06-11 10:28:17 +02:00
parent 7c3edd6d9c
commit 2f064a59a1
28 changed files with 123 additions and 111 deletions
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4
lib/syscall.c
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@@ -68,13 +68,13 @@ static int collect_syscall(struct task_struct *target, struct syscall_info *info
*/
int task_current_syscall(struct task_struct *target, struct syscall_info *info)
{
long state;
unsigned long ncsw;
unsigned int state;
if (target == current)
return collect_syscall(target, info);
state = target->state;
state = READ_ONCE(target->__state);
if (unlikely(!state))
return -EAGAIN;