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Commit c97d4869 authored by Russell King's avatar Russell King Committed by Russell King
Browse files

[ARM] Fix SMP irqflags support 



The IRQ changes a while back broke the build for SMP machines.
Fix up the SMP code to use set_irq_regs/get_irq_regs as
appropriate.  Also, fix a warning in arch/arm/kernel/time.c
where 'regs' becomes unused for SMP builds.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 858cbcdd

arch/arm/kernel/smp.c

+13 −7
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 
 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

#include <linux/module.h>

#include <linux/delay.h>

#include <linux/init.h>

#include <linux/spinlock.h>
@@ -19,6 +20,7 @@ 
#include <linux/cpu.h>

#include <linux/smp.h>

#include <linux/seq_file.h>

#include <linux/irq.h>



#include <asm/atomic.h>

#include <asm/cacheflush.h>
@@ -474,25 +476,26 @@ void show_local_irqs(struct seq_file *p) 
	seq_putc(p, '\n');

}



static void ipi_timer(struct pt_regs *regs)

static void ipi_timer(void)

{

	int user = user_mode(regs);



	irq_enter();

	profile_tick(CPU_PROFILING, regs);

	update_process_times(user);

	profile_tick(CPU_PROFILING);

	update_process_times(user_mode(get_irq_regs()));

	irq_exit();

}



#ifdef CONFIG_LOCAL_TIMERS

asmlinkage void do_local_timer(struct pt_regs *regs)

{

	struct pt_regs *old_regs = set_irq_regs(regs);

	int cpu = smp_processor_id();



	if (local_timer_ack()) {

		irq_stat[cpu].local_timer_irqs++;

		ipi_timer(regs);

		ipi_timer();

	}



	set_irq_regs(old_regs);

}

#endif
@@ -551,6 +554,7 @@ asmlinkage void do_IPI(struct pt_regs *regs) 
{

	unsigned int cpu = smp_processor_id();

	struct ipi_data *ipi = &per_cpu(ipi_data, cpu);

	struct pt_regs *old_regs = set_irq_regs(regs);



	ipi->ipi_count++;
@@ -574,7 +578,7 @@ asmlinkage void do_IPI(struct pt_regs *regs) 


			switch (nextmsg) {

			case IPI_TIMER:

				ipi_timer(regs);

				ipi_timer();

				break;



			case IPI_RESCHEDULE:
@@ -599,6 +603,8 @@ asmlinkage void do_IPI(struct pt_regs *regs) 
			}

		} while (msgs);

	}



	set_irq_regs(old_regs);

}



void smp_send_reschedule(int cpu)

arch/arm/kernel/time.c

+1 −2
Original line number Diff line number Diff line
@@ -327,13 +327,12 @@ EXPORT_SYMBOL(restore_time_delta); 
 */

void timer_tick(void)

{

	struct pt_regs *regs = get_irq_regs();

	profile_tick(CPU_PROFILING);

	do_leds();

	do_set_rtc();

	do_timer(1);

#ifndef CONFIG_SMP

	update_process_times(user_mode(regs));

	update_process_times(user_mode(get_irq_regs()));

#endif

}