sched: Convert cpupri lock to raw_spinlock

Convert locks which cannot be sleeping locks in preempt-rt to
raw_spinlocks.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/sched_cpupri.c b/kernel/sched_cpupri.c
index 0f052fc..597b330 100644 (file)
--- a/kernel/sched_cpupri.c
+++ b/kernel/sched_cpupri.c
@@ -135,26 +135,26 @@ void cpupri_set(struct cpupri *cp, int cpu, int newpri)
        if (likely(newpri != CPUPRI_INVALID)) {
                struct cpupri_vec *vec = &cp->pri_to_cpu[newpri];
 
-               spin_lock_irqsave(&vec->lock, flags);
+               raw_spin_lock_irqsave(&vec->lock, flags);
 
                cpumask_set_cpu(cpu, vec->mask);
                vec->count++;
                if (vec->count == 1)
                        set_bit(newpri, cp->pri_active);
 
-               spin_unlock_irqrestore(&vec->lock, flags);
+               raw_spin_unlock_irqrestore(&vec->lock, flags);
        }
        if (likely(oldpri != CPUPRI_INVALID)) {
                struct cpupri_vec *vec  = &cp->pri_to_cpu[oldpri];
 
-               spin_lock_irqsave(&vec->lock, flags);
+               raw_spin_lock_irqsave(&vec->lock, flags);
 
                vec->count--;
                if (!vec->count)
                        clear_bit(oldpri, cp->pri_active);
                cpumask_clear_cpu(cpu, vec->mask);
 
-               spin_unlock_irqrestore(&vec->lock, flags);
+               raw_spin_unlock_irqrestore(&vec->lock, flags);
        }
 
        *currpri = newpri;
@@ -180,7 +180,7 @@ int cpupri_init(struct cpupri *cp, bool bootmem)
        for (i = 0; i < CPUPRI_NR_PRIORITIES; i++) {
                struct cpupri_vec *vec = &cp->pri_to_cpu[i];
 
-               spin_lock_init(&vec->lock);
+               raw_spin_lock_init(&vec->lock);
                vec->count = 0;
                if (!zalloc_cpumask_var(&vec->mask, gfp))
                        goto cleanup;

diff --git a/kernel/sched_cpupri.h b/kernel/sched_cpupri.h
index 9a7e859..7cb5bb6 100644 (file)
--- a/kernel/sched_cpupri.h
+++ b/kernel/sched_cpupri.h
@@ -12,7 +12,7 @@
 /* values 2-101 are RT priorities 0-99 */
 
 struct cpupri_vec {
-       spinlock_t lock;
+       raw_spinlock_t lock;
        int        count;
        cpumask_var_t mask;
 };