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Merge branch 'tip/tracing/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace

This commit is contained in:
Ingo Molnar 2009-02-13 11:02:40 +01:00
parent d351c8db95 2a7b8df04c
commit 5fb896a4e9
4 changed files with 40 additions and 74 deletions
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13
arch/alpha/include/asm/hardirq.h
View File

@ -14,17 +14,4 @@ typedef struct {
void ack_bad_irq(unsigned int irq);
#define HARDIRQ_BITS 12
/*
* The hardirq mask has to be large enough to have
* space for potentially nestable IRQ sources in the system
* to nest on a single CPU. On Alpha, interrupts are masked at the CPU
* by IPL as well as at the system level. We only have 8 IPLs (UNIX PALcode)
* so we really only have 8 nestable IRQs, but allow some overhead
*/
#if (1 << HARDIRQ_BITS) < 16
#error HARDIRQ_BITS is too low!
#endif
#endif /* _ALPHA_HARDIRQ_H */

11
arch/avr32/include/asm/hardirq.h
View File

@ -20,15 +20,4 @@ void ack_bad_irq(unsigned int irq);
#endif /* __ASSEMBLY__ */
#define HARDIRQ_BITS 12
/*
* 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
#endif /* __ASM_AVR32_HARDIRQ_H */

10
arch/ia64/include/asm/hardirq.h
View File

@ -20,16 +20,6 @@
#define local_softirq_pending() (local_cpu_data->softirq_pending)
#define HARDIRQ_BITS 14
/*
* 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
extern void __iomem *ipi_base_addr;
void ack_bad_irq(unsigned int irq);

80
include/linux/hardirq.h
View File

@ -15,61 +15,61 @@
* - 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 be overridden per architecture, the default is:
* 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 16-27 are the hardirq count (max # of hardirqs: 4096)
* - ( bit 28 is the PREEMPT_ACTIVE flag. )
* - bits 16-25 are the hardirq count (max # of nested hardirqs: 1024)
* - bit 26 is the NMI_MASK
* - bit 28 is the PREEMPT_ACTIVE flag
*
* PREEMPT_MASK: 0x000000ff
* SOFTIRQ_MASK: 0x0000ff00
* HARDIRQ_MASK: 0x0fff0000
* HARDIRQ_MASK: 0x03ff0000
* NMI_MASK: 0x04000000
*/
#define PREEMPT_BITS 8
#define SOFTIRQ_BITS 8
#define NMI_BITS 1
#define MAX_HARDIRQ_BITS 10
#ifndef HARDIRQ_BITS
#define HARDIRQ_BITS 12
#ifndef MAX_HARDIRQS_PER_CPU
#define MAX_HARDIRQS_PER_CPU NR_IRQS
# define HARDIRQ_BITS MAX_HARDIRQ_BITS
#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) < MAX_HARDIRQS_PER_CPU
# error HARDIRQ_BITS is too low!
#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)
#define NMI_SHIFT (HARDIRQ_SHIFT + HARDIRQ_BITS)
#define __IRQ_MASK(x) ((1UL << (x))-1)
#define PREEMPT_MASK (__IRQ_MASK(PREEMPT_BITS) << PREEMPT_SHIFT)
#define SOFTIRQ_MASK (__IRQ_MASK(SOFTIRQ_BITS) << SOFTIRQ_SHIFT)
#define HARDIRQ_MASK (__IRQ_MASK(HARDIRQ_BITS) << HARDIRQ_SHIFT)
#define NMI_MASK (__IRQ_MASK(NMI_BITS) << NMI_SHIFT)
#define PREEMPT_OFFSET (1UL << PREEMPT_SHIFT)
#define SOFTIRQ_OFFSET (1UL << SOFTIRQ_SHIFT)
#define HARDIRQ_OFFSET (1UL << HARDIRQ_SHIFT)
#define NMI_OFFSET (1UL << NMI_SHIFT)
#if PREEMPT_ACTIVE < (1 << (HARDIRQ_SHIFT + HARDIRQ_BITS))
#if PREEMPT_ACTIVE < (1 << (NMI_SHIFT + NMI_BITS))
#error PREEMPT_ACTIVE is too low!
#endif
#define NMI_OFFSET (PREEMPT_ACTIVE << 1)
#if NMI_OFFSET >= 0x80000000
#error PREEMPT_ACTIVE too high!
#endif
#define hardirq_count() (preempt_count() & HARDIRQ_MASK)
#define softirq_count() (preempt_count() & SOFTIRQ_MASK)
#define irq_count() (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_MASK))
#define irq_count() (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_MASK \
| NMI_MASK))
/*
* Are we doing bottom half or hardware interrupt processing?
@ -82,7 +82,7 @@
/*
* Are we in NMI context?
*/
#define in_nmi() (preempt_count() & NMI_OFFSET)
#define in_nmi() (preempt_count() & NMI_MASK)
#if defined(CONFIG_PREEMPT)
# define PREEMPT_INATOMIC_BASE kernel_locked()
@ -175,24 +175,24 @@ extern void irq_enter(void);
*/
extern void irq_exit(void);
#define nmi_enter() \
do { \
ftrace_nmi_enter(); \
BUG_ON(in_nmi()); \
add_preempt_count(NMI_OFFSET); \
lockdep_off(); \
rcu_nmi_enter(); \
__irq_enter(); \
#define nmi_enter() \
do { \
ftrace_nmi_enter(); \
BUG_ON(in_nmi()); \
add_preempt_count(NMI_OFFSET + HARDIRQ_OFFSET); \
lockdep_off(); \
rcu_nmi_enter(); \
trace_hardirq_enter(); \
} while (0)
#define nmi_exit() \
do { \
__irq_exit(); \
rcu_nmi_exit(); \
lockdep_on(); \
BUG_ON(!in_nmi()); \
sub_preempt_count(NMI_OFFSET); \
ftrace_nmi_exit(); \
#define nmi_exit() \
do { \
trace_hardirq_exit(); \
rcu_nmi_exit(); \
lockdep_on(); \
BUG_ON(!in_nmi()); \
sub_preempt_count(NMI_OFFSET + HARDIRQ_OFFSET); \
ftrace_nmi_exit(); \
} while (0)
#endif /* LINUX_HARDIRQ_H */