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Commit d7ce78fd authored by David S. Miller's avatar David S. Miller
Browse files

[SPARC64]: Eliminate irq_cpustat_t. 



We can put the __softirq_pending mask in the cpudata,
no need for the silly NR_CPUS array in kernel/softirq.c

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 826509f8

arch/sparc64/kernel/rtrap.S

+8 −5
Original line number Diff line number Diff line
@@ -153,11 +153,14 @@ __handle_signal: 
rtrap_irq:

rtrap_clr_l6:	clr			%l6

rtrap:

		ldub			[%g6 + TI_CPU], %l0

		sethi			%hi(irq_stat), %l2	! &softirq_active

		or			%l2, %lo(irq_stat), %l2	! &softirq_active

irqsz_patchme:	sllx			%l0, 0, %l0

		lduw			[%l2 + %l0], %l1	! softirq_pending

#ifndef CONFIG_SMP

		sethi			%hi(per_cpu____cpu_data), %l0

		lduw			[%l0 + %lo(per_cpu____cpu_data)], %l1

#else

		sethi			%hi(per_cpu____cpu_data), %l0

		or			%l0, %lo(per_cpu____cpu_data), %l0

		lduw			[%l0 + %g5], %l1

#endif

		cmp			%l1, 0



		/* mm/ultra.S:xcall_report_regs KNOWS about this load. */

arch/sparc64/kernel/setup.c

+0 −12
Original line number Diff line number Diff line
@@ -511,18 +511,6 @@ void __init setup_arch(char **cmdline_p) 
	conswitchp = &prom_con;

#endif



#ifdef CONFIG_SMP

	i = (unsigned long)&irq_stat[1] - (unsigned long)&irq_stat[0];

	if ((i == SMP_CACHE_BYTES) || (i == (2 * SMP_CACHE_BYTES))) {

		extern unsigned int irqsz_patchme[1];

		irqsz_patchme[0] |= ((i == SMP_CACHE_BYTES) ? SMP_CACHE_BYTES_SHIFT : \

							SMP_CACHE_BYTES_SHIFT + 1);

		flushi((long)&irqsz_patchme[0]);

	} else {

		prom_printf("Unexpected size of irq_stat[] elements\n");

		prom_halt();

	}

#endif

	/* Work out if we are starfire early on */

	check_if_starfire();

include/asm-sparc64/cpudata.h

+2 −2
Original line number Diff line number Diff line 
/* cpudata.h: Per-cpu parameters.

 *

 * Copyright (C) 2003 David S. Miller (davem@redhat.com)

 * Copyright (C) 2003, 2005 David S. Miller (davem@redhat.com)

 */



#ifndef _SPARC64_CPUDATA_H
@@ -10,7 +10,7 @@ 


typedef struct {

	/* Dcache line 1 */

	unsigned int	__pad0;		/* bh_count moved to irq_stat for consistency. KAO */

	unsigned int	__softirq_pending; /* must be 1st, see rtrap.S */

	unsigned int	multiplier;

	unsigned int	counter;

	unsigned int	idle_volume;

include/asm-sparc64/hardirq.h

+5 −11
Original line number Diff line number Diff line 
/* hardirq.h: 64-bit Sparc hard IRQ support.

 *

 * Copyright (C) 1997, 1998 David S. Miller (davem@caip.rutgers.edu)

 * Copyright (C) 1997, 1998, 2005 David S. Miller (davem@davemloft.net)

 */



#ifndef __SPARC64_HARDIRQ_H

#define __SPARC64_HARDIRQ_H



#include <linux/config.h>

#include <linux/threads.h>

#include <linux/spinlock.h>

#include <linux/cache.h>

#include <asm/cpudata.h>



/* rtrap.S is sensitive to the offsets of these fields */

typedef struct {

	unsigned int __softirq_pending;

} ____cacheline_aligned irq_cpustat_t;



#include <linux/irq_cpustat.h>	/* Standard mappings for irq_cpustat_t above */

#define __ARCH_IRQ_STAT

#define local_softirq_pending() \

	(local_cpu_data().__softirq_pending)



#define HARDIRQ_BITS	8