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Commit 203041ad authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Benjamin Herrenschmidt
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powerpc: Convert mpic locks to raw_spinlock 



mpic_lock, irq_rover_lock and fixup_lock need to be real spinlocks in
RT. Convert them to raw_spinlock.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent d0eab3eb

arch/powerpc/include/asm/mpic.h

+1 −1
Original line number Diff line number Diff line
@@ -289,7 +289,7 @@ struct mpic 
#ifdef CONFIG_MPIC_U3_HT_IRQS

	/* The fixup table */

	struct mpic_irq_fixup	*fixups;

	spinlock_t		fixup_lock;

	raw_spinlock_t	fixup_lock;

#endif



	/* Register access method */

arch/powerpc/sysdev/mpic.c

+19 −19
Original line number Diff line number Diff line
@@ -46,7 +46,7 @@ 


static struct mpic *mpics;

static struct mpic *mpic_primary;

static DEFINE_SPINLOCK(mpic_lock);

static DEFINE_RAW_SPINLOCK(mpic_lock);



#ifdef CONFIG_PPC32	/* XXX for now */

#ifdef CONFIG_IRQ_ALL_CPUS
@@ -347,10 +347,10 @@ static inline void mpic_ht_end_irq(struct mpic *mpic, unsigned int source) 
		unsigned int mask = 1U << (fixup->index & 0x1f);

		writel(mask, fixup->applebase + soff);

	} else {

		spin_lock(&mpic->fixup_lock);

		raw_spin_lock(&mpic->fixup_lock);

		writeb(0x11 + 2 * fixup->index, fixup->base + 2);

		writel(fixup->data, fixup->base + 4);

		spin_unlock(&mpic->fixup_lock);

		raw_spin_unlock(&mpic->fixup_lock);

	}

}
@@ -366,7 +366,7 @@ static void mpic_startup_ht_interrupt(struct mpic *mpic, unsigned int source, 


	DBG("startup_ht_interrupt(0x%x, 0x%x) index: %d\n",

	    source, irqflags, fixup->index);

	spin_lock_irqsave(&mpic->fixup_lock, flags);

	raw_spin_lock_irqsave(&mpic->fixup_lock, flags);

	/* Enable and configure */

	writeb(0x10 + 2 * fixup->index, fixup->base + 2);

	tmp = readl(fixup->base + 4);
@@ -374,7 +374,7 @@ static void mpic_startup_ht_interrupt(struct mpic *mpic, unsigned int source, 
	if (irqflags & IRQ_LEVEL)

		tmp |= 0x22;

	writel(tmp, fixup->base + 4);

	spin_unlock_irqrestore(&mpic->fixup_lock, flags);

	raw_spin_unlock_irqrestore(&mpic->fixup_lock, flags);



#ifdef CONFIG_PM

	/* use the lowest bit inverted to the actual HW,
@@ -396,12 +396,12 @@ static void mpic_shutdown_ht_interrupt(struct mpic *mpic, unsigned int source, 
	DBG("shutdown_ht_interrupt(0x%x, 0x%x)\n", source, irqflags);



	/* Disable */

	spin_lock_irqsave(&mpic->fixup_lock, flags);

	raw_spin_lock_irqsave(&mpic->fixup_lock, flags);

	writeb(0x10 + 2 * fixup->index, fixup->base + 2);

	tmp = readl(fixup->base + 4);

	tmp |= 1;

	writel(tmp, fixup->base + 4);

	spin_unlock_irqrestore(&mpic->fixup_lock, flags);

	raw_spin_unlock_irqrestore(&mpic->fixup_lock, flags);



#ifdef CONFIG_PM

	/* use the lowest bit inverted to the actual HW,
@@ -515,7 +515,7 @@ static void __init mpic_scan_ht_pics(struct mpic *mpic) 
	BUG_ON(mpic->fixups == NULL);



	/* Init spinlock */

	spin_lock_init(&mpic->fixup_lock);

	raw_spin_lock_init(&mpic->fixup_lock);



	/* Map U3 config space. We assume all IO-APICs are on the primary bus

	 * so we only need to map 64kB.
@@ -573,12 +573,12 @@ static int irq_choose_cpu(const cpumask_t *mask) 


	if (cpumask_equal(mask, cpu_all_mask)) {

		static int irq_rover;

		static DEFINE_SPINLOCK(irq_rover_lock);

		static DEFINE_RAW_SPINLOCK(irq_rover_lock);

		unsigned long flags;



		/* Round-robin distribution... */

	do_round_robin:

		spin_lock_irqsave(&irq_rover_lock, flags);

		raw_spin_lock_irqsave(&irq_rover_lock, flags);



		while (!cpu_online(irq_rover)) {

			if (++irq_rover >= NR_CPUS)
@@ -590,7 +590,7 @@ static int irq_choose_cpu(const cpumask_t *mask) 
				irq_rover = 0;

		} while (!cpu_online(irq_rover));



		spin_unlock_irqrestore(&irq_rover_lock, flags);

		raw_spin_unlock_irqrestore(&irq_rover_lock, flags);

	} else {

		cpuid = cpumask_first_and(mask, cpu_online_mask);

		if (cpuid >= nr_cpu_ids)
@@ -1368,14 +1368,14 @@ void __init mpic_set_serial_int(struct mpic *mpic, int enable) 
	unsigned long flags;

	u32 v;



	spin_lock_irqsave(&mpic_lock, flags);

	raw_spin_lock_irqsave(&mpic_lock, flags);

	v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1);

	if (enable)

		v |= MPIC_GREG_GLOBAL_CONF_1_SIE;

	else

		v &= ~MPIC_GREG_GLOBAL_CONF_1_SIE;

	mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v);

	spin_unlock_irqrestore(&mpic_lock, flags);

	raw_spin_unlock_irqrestore(&mpic_lock, flags);

}



void mpic_irq_set_priority(unsigned int irq, unsigned int pri)
@@ -1388,7 +1388,7 @@ void mpic_irq_set_priority(unsigned int irq, unsigned int pri) 
	if (!mpic)

		return;



	spin_lock_irqsave(&mpic_lock, flags);

	raw_spin_lock_irqsave(&mpic_lock, flags);

	if (mpic_is_ipi(mpic, irq)) {

		reg = mpic_ipi_read(src - mpic->ipi_vecs[0]) &

			~MPIC_VECPRI_PRIORITY_MASK;
@@ -1400,7 +1400,7 @@ void mpic_irq_set_priority(unsigned int irq, unsigned int pri) 
		mpic_irq_write(src, MPIC_INFO(IRQ_VECTOR_PRI),

			       reg | (pri << MPIC_VECPRI_PRIORITY_SHIFT));

	}

	spin_unlock_irqrestore(&mpic_lock, flags);

	raw_spin_unlock_irqrestore(&mpic_lock, flags);

}



void mpic_setup_this_cpu(void)
@@ -1415,7 +1415,7 @@ void mpic_setup_this_cpu(void) 


	DBG("%s: setup_this_cpu(%d)\n", mpic->name, hard_smp_processor_id());



	spin_lock_irqsave(&mpic_lock, flags);

	raw_spin_lock_irqsave(&mpic_lock, flags);



 	/* let the mpic know we want intrs. default affinity is 0xffffffff

	 * until changed via /proc. That's how it's done on x86. If we want
@@ -1431,7 +1431,7 @@ void mpic_setup_this_cpu(void) 
	/* Set current processor priority to 0 */

	mpic_cpu_write(MPIC_INFO(CPU_CURRENT_TASK_PRI), 0);



	spin_unlock_irqrestore(&mpic_lock, flags);

	raw_spin_unlock_irqrestore(&mpic_lock, flags);

#endif /* CONFIG_SMP */

}
@@ -1460,7 +1460,7 @@ void mpic_teardown_this_cpu(int secondary) 
	BUG_ON(mpic == NULL);



	DBG("%s: teardown_this_cpu(%d)\n", mpic->name, hard_smp_processor_id());

	spin_lock_irqsave(&mpic_lock, flags);

	raw_spin_lock_irqsave(&mpic_lock, flags);



	/* let the mpic know we don't want intrs.  */

	for (i = 0; i < mpic->num_sources ; i++)
@@ -1474,7 +1474,7 @@ void mpic_teardown_this_cpu(int secondary) 
	 */

	mpic_eoi(mpic);



	spin_unlock_irqrestore(&mpic_lock, flags);

	raw_spin_unlock_irqrestore(&mpic_lock, flags);

}