/usr/arm-linux-androideabi/include/linux/hardirq.h is in gcc-arm-linux-androideabi 0.20130705.1-0ubuntu7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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****************************************************************************
***
*** This header was automatically generated from a Linux kernel header
*** of the same name, to make information necessary for userspace to
*** call into the kernel available to libc. It contains only constants,
*** structures, and macros generated from the original header, and thus,
*** contains no copyrightable information.
***
*** To edit the content of this header, modify the corresponding
*** source file (e.g. under external/kernel-headers/original/) then
*** run bionic/libc/kernel/tools/update_all.py
***
*** Any manual change here will be lost the next time this script will
*** be run. You've been warned!
***
****************************************************************************
****************************************************************************/
#ifndef LINUX_HARDIRQ_H
#define LINUX_HARDIRQ_H
#include <linux/preempt.h>
#include <linux/smp_lock.h>
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#include <linux/lockdep.h>
#include <asm/hardirq.h>
#include <asm/system.h>
#define PREEMPT_BITS 8
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define SOFTIRQ_BITS 8
#ifndef HARDIRQ_BITS
#define HARDIRQ_BITS 12
#if 1 << HARDIRQ_BITS < NR_IRQS
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#error HARDIRQ_BITS is too low!
#endif
#endif
#define PREEMPT_SHIFT 0
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define SOFTIRQ_SHIFT (PREEMPT_SHIFT + PREEMPT_BITS)
#define HARDIRQ_SHIFT (SOFTIRQ_SHIFT + SOFTIRQ_BITS)
#define __IRQ_MASK(x) ((1UL << (x))-1)
#define PREEMPT_MASK (__IRQ_MASK(PREEMPT_BITS) << PREEMPT_SHIFT)
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define SOFTIRQ_MASK (__IRQ_MASK(SOFTIRQ_BITS) << SOFTIRQ_SHIFT)
#define HARDIRQ_MASK (__IRQ_MASK(HARDIRQ_BITS) << HARDIRQ_SHIFT)
#define PREEMPT_OFFSET (1UL << PREEMPT_SHIFT)
#define SOFTIRQ_OFFSET (1UL << SOFTIRQ_SHIFT)
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define HARDIRQ_OFFSET (1UL << HARDIRQ_SHIFT)
#if PREEMPT_ACTIVE < 1 << HARDIRQ_SHIFT + HARDIRQ_BITS
#error PREEMPT_ACTIVE is too low!
#endif
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define hardirq_count() (preempt_count() & HARDIRQ_MASK)
#define softirq_count() (preempt_count() & SOFTIRQ_MASK)
#define irq_count() (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_MASK))
#define in_irq() (hardirq_count())
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define in_softirq() (softirq_count())
#define in_interrupt() (irq_count())
#define in_atomic() ((preempt_count() & ~PREEMPT_ACTIVE) != 0)
#define preemptible() 0
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define IRQ_EXIT_OFFSET HARDIRQ_OFFSET
#define synchronize_irq(irq) barrier()
struct task_struct;
#define irq_enter() do { account_system_vtime(current); add_preempt_count(HARDIRQ_OFFSET); trace_hardirq_enter(); } while (0)
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define __irq_exit() do { trace_hardirq_exit(); account_system_vtime(current); sub_preempt_count(HARDIRQ_OFFSET); } while (0)
#define nmi_enter() do { lockdep_off(); irq_enter(); } while (0)
#define nmi_exit() do { __irq_exit(); lockdep_on(); } while (0)
#endif
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
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