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[SPARC64]: Eliminate irq_cpustat_t.

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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: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2005-08-29 22:46:43 -07:00
parent 826509f811
commit d7ce78fd9a
4 changed files with 15 additions and 30 deletions
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13
arch/sparc64/kernel/rtrap.S
View File

@ -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. */

12
arch/sparc64/kernel/setup.c
View File

@ -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();

4
include/asm-sparc64/cpudata.h
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@ -1,6 +1,6 @@
/* 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;

16
include/asm-sparc64/hardirq.h
View File

@ -1,22 +1,16 @@
/* 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