416821d3d6
This patch fixes few build issues which were introduced with the last irq stack patch, e.g. the combination of stack overflow check and irq stack. Furthermore we now do proper locking and change the irq bh handler to use the irq stack as well. In /proc/interrupts one now can monitor how huge the irq stack has grown and how often it was preferred over the kernel stack. IRQ stacks are now enabled by default just to make sure that we not overflow the kernel stack by accident. Signed-off-by: Helge Deller <deller@gmx.de>
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/* hardirq.h: PA-RISC hard IRQ support.
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*
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* Copyright (C) 2001 Matthew Wilcox <matthew@wil.cx>
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* Copyright (C) 2013 Helge Deller <deller@gmx.de>
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*/
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#ifndef _PARISC_HARDIRQ_H
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#define _PARISC_HARDIRQ_H
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#include <linux/cache.h>
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#include <linux/threads.h>
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#include <linux/irq.h>
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#ifdef CONFIG_IRQSTACKS
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#define __ARCH_HAS_DO_SOFTIRQ
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#endif
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typedef struct {
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unsigned int __softirq_pending;
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#ifdef CONFIG_DEBUG_STACKOVERFLOW
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unsigned int kernel_stack_usage;
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#ifdef CONFIG_IRQSTACKS
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unsigned int irq_stack_usage;
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unsigned int irq_stack_counter;
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#endif
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#endif
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#ifdef CONFIG_SMP
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unsigned int irq_resched_count;
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unsigned int irq_call_count;
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#endif
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unsigned int irq_tlb_count;
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} ____cacheline_aligned irq_cpustat_t;
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DECLARE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
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#define __ARCH_IRQ_STAT
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#define __IRQ_STAT(cpu, member) (irq_stat[cpu].member)
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#define inc_irq_stat(member) this_cpu_inc(irq_stat.member)
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#define __inc_irq_stat(member) __this_cpu_inc(irq_stat.member)
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#define local_softirq_pending() this_cpu_read(irq_stat.__softirq_pending)
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#define __ARCH_SET_SOFTIRQ_PENDING
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#define set_softirq_pending(x) \
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this_cpu_write(irq_stat.__softirq_pending, (x))
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#define or_softirq_pending(x) this_cpu_or(irq_stat.__softirq_pending, (x))
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#define ack_bad_irq(irq) WARN(1, "unexpected IRQ trap at vector %02x\n", irq)
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#endif /* _PARISC_HARDIRQ_H */
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