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hardirq: Make hardirq bits generic

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There is no reason for per arch hardirq bits. Make them all generic

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20130917183628.534494408@linutronix.de
This commit is contained in:
Thomas Gleixner 2013-09-17 18:53:05 +00:00
parent 09f90f6685
commit 54197e43a4
9 changed files with 8 additions and 71 deletions
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3
arch/blackfin/include/asm/hardirq.h
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@ -12,9 +12,6 @@
extern void ack_bad_irq(unsigned int irq);
#define ack_bad_irq ack_bad_irq
/* Define until common code gets sane defaults */
#define HARDIRQ_BITS 9
#include <asm-generic/hardirq.h>
#endif

12
arch/cris/include/asm/hardirq.h
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@ -2,18 +2,6 @@
#define __ASM_HARDIRQ_H
#include <asm/irq.h>
#define HARDIRQ_BITS 8
/*
* The hardirq mask has to be large enough to have
* space for potentially all IRQ sources in the system
* nesting on a single CPU:
*/
#if (1 << HARDIRQ_BITS) < NR_IRQS
# error HARDIRQ_BITS is too low!
#endif
#include <asm-generic/hardirq.h>
#endif /* __ASM_HARDIRQ_H */

16
arch/m32r/include/asm/hardirq.h
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@ -3,22 +3,6 @@
#define __ASM_HARDIRQ_H
#include <asm/irq.h>
#if NR_IRQS > 256
#define HARDIRQ_BITS 9
#else
#define HARDIRQ_BITS 8
#endif
/*
* The hardirq mask has to be large enough to have
* space for potentially all IRQ sources in the system
* nesting on a single CPU:
*/
#if (1 << HARDIRQ_BITS) < NR_IRQS
# error HARDIRQ_BITS is too low!
#endif
#include <asm-generic/hardirq.h>
#endif /* __ASM_HARDIRQ_H */

11
arch/m68k/include/asm/hardirq.h
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@ -5,17 +5,6 @@
#include <linux/cache.h>
#include <asm/irq.h>
#define HARDIRQ_BITS 8
/*
* The hardirq mask has to be large enough to have
* space for potentially all IRQ sources in the system
* nesting on a single CPU:
*/
#if (1 << HARDIRQ_BITS) < NR_IRQS
# error HARDIRQ_BITS is too low!
#endif
#ifdef CONFIG_MMU
static inline void ack_bad_irq(unsigned int irq)

2
arch/s390/include/asm/hardirq.h
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@ -18,8 +18,6 @@
#define __ARCH_HAS_DO_SOFTIRQ
#define __ARCH_IRQ_EXIT_IRQS_DISABLED
#define HARDIRQ_BITS 8
static inline void ack_bad_irq(unsigned int irq)
{
printk(KERN_CRIT "unexpected IRQ trap at vector %02x\n", irq);

1
arch/sparc/include/asm/hardirq_32.h
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@ -7,7 +7,6 @@
#ifndef __SPARC_HARDIRQ_H
#define __SPARC_HARDIRQ_H
#define HARDIRQ_BITS 8
#include <asm-generic/hardirq.h>
#endif /* __SPARC_HARDIRQ_H */

2
arch/sparc/include/asm/hardirq_64.h
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@ -14,6 +14,4 @@
void ack_bad_irq(unsigned int irq);
#define HARDIRQ_BITS 8
#endif /* !(__SPARC64_HARDIRQ_H) */

2
arch/tile/include/asm/hardirq.h
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@ -42,6 +42,4 @@ DECLARE_PER_CPU(irq_cpustat_t, irq_stat);
#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
#define HARDIRQ_BITS 8
#endif /* _ASM_TILE_HARDIRQ_H */

30
include/linux/preempt_mask.h
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@ -11,36 +11,22 @@
* - bits 0-7 are the preemption count (max preemption depth: 256)
* - bits 8-15 are the softirq count (max # of softirqs: 256)
*
* The hardirq count can in theory reach the same as NR_IRQS.
* In reality, the number of nested IRQS is limited to the stack
* size as well. For archs with over 1000 IRQS it is not practical
* to expect that they will all nest. We give a max of 10 bits for
* hardirq nesting. An arch may choose to give less than 10 bits.
* m68k expects it to be 8.
*
* - bits 16-25 are the hardirq count (max # of nested hardirqs: 1024)
* - bit 26 is the NMI_MASK
* - bit 27 is the PREEMPT_ACTIVE flag
* The hardirq count could in theory be the same as the number of
* interrupts in the system, but we run all interrupt handlers with
* interrupts disabled, so we cannot have nesting interrupts. Though
* there are a few palaeontologic drivers which reenable interrupts in
* the handler, so we need more than one bit here.
*
* PREEMPT_MASK: 0x000000ff
* SOFTIRQ_MASK: 0x0000ff00
* HARDIRQ_MASK: 0x03ff0000
* NMI_MASK: 0x04000000
* HARDIRQ_MASK: 0x000f0000
* NMI_MASK: 0x00100000
*/
#define PREEMPT_BITS 8
#define SOFTIRQ_BITS 8
#define HARDIRQ_BITS 4
#define NMI_BITS 1
#define MAX_HARDIRQ_BITS 10
#ifndef HARDIRQ_BITS
# define HARDIRQ_BITS MAX_HARDIRQ_BITS
#endif
#if HARDIRQ_BITS > MAX_HARDIRQ_BITS
#error HARDIRQ_BITS too high!
#endif
#define PREEMPT_SHIFT 0
#define SOFTIRQ_SHIFT (PREEMPT_SHIFT + PREEMPT_BITS)
#define HARDIRQ_SHIFT (SOFTIRQ_SHIFT + SOFTIRQ_BITS)