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sched/wait, arch/mips: Fix and convert wait_on_atomic_t() usage to the new wait_var_event() API

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The old wait_on_atomic_t() is going to get removed, use the more
flexible wait_var_event() API instead.

And while there, fix a bug and add the missing wakeup...

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2018-03-15 11:45:44 +01:00 committed by Ingo Molnar
parent e24e960c7f
commit 6887a56b6e
2 changed files with 4 additions and 2 deletions
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2
arch/mips/kernel/process.c
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@ -781,6 +781,8 @@ int mips_set_process_fp_mode(struct task_struct *task, unsigned int value)
atomic_set(&task->mm->context.fp_mode_switching, 0);
preempt_enable();
wake_up_var(&task->mm->context.fp_mode_switching);
return 0;
}

4
arch/mips/kernel/traps.c
View file

@ -1248,8 +1248,8 @@ static int enable_restore_fp_context(int msa)
* If an FP mode switch is currently underway, wait for it to
* complete before proceeding.
*/
wait_on_atomic_t(&current->mm->context.fp_mode_switching,
atomic_t_wait, TASK_KILLABLE);
wait_var_event(&current->mm->context.fp_mode_switching,
!atomic_read(&current->mm->context.fp_mode_switching));
if (!used_math()) {
/* First time FP context user. */