Axis 221 camera embedded programing interface

				#ifndef LINUX_HARDIRQ_H				#define LINUX_HARDIRQ_H								#include 				#include 				#include 				#include 				#include 								/*				 * We put the hardirq and softirq counter into the preemption				 * counter. The bitmask has the following meaning:				 *				 * - 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:				 *				 * - bits 16-27 are the hardirq count (max # of hardirqs: 4096)				 * - ( bit 28 is the PREEMPT_ACTIVE flag. )				 *				 * PREEMPT_MASK: 0x000000ff				 * SOFTIRQ_MASK: 0x0000ff00				 * HARDIRQ_MASK: 0x0fff0000				 */				#define PREEMPT_BITS	8				#define SOFTIRQ_BITS	8								#ifndef HARDIRQ_BITS				#define HARDIRQ_BITS	12								#ifndef MAX_HARDIRQS_PER_CPU				#define MAX_HARDIRQS_PER_CPU NR_IRQS				#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 				# error HARDIRQ_BITS is too low!				#endif				#endif								#define PREEMPT_SHIFT	0				#define SOFTIRQ_SHIFT	(PREEMPT_SHIFT + PREEMPT_BITS)				#define HARDIRQ_SHIFT	(SOFTIRQ_SHIFT + SOFTIRQ_BITS)								#define __IRQ_MASK(x)	((1UL 								#define PREEMPT_MASK	(__IRQ_MASK(PREEMPT_BITS) 				#define SOFTIRQ_MASK	(__IRQ_MASK(SOFTIRQ_BITS) 				#define HARDIRQ_MASK	(__IRQ_MASK(HARDIRQ_BITS) 								#define PREEMPT_OFFSET	(1UL 				#define SOFTIRQ_OFFSET	(1UL 				#define HARDIRQ_OFFSET	(1UL 								#if PREEMPT_ACTIVE < (1 				#error PREEMPT_ACTIVE is too low!				#endif								#define hardirq_count()	(preempt_count() & HARDIRQ_MASK)				#define softirq_count()	(preempt_count() & SOFTIRQ_MASK)				#define irq_count()	(preempt_count() & (HARDIRQ_MASK | SOFTIRQ_MASK))								/*				 * Are we doing bottom half or hardware interrupt processing?				 * Are we in a softirq context? Interrupt context?				 */				#define in_irq()		(hardirq_count())				#define in_softirq()		(softirq_count())				#define in_interrupt()		(irq_count())								#if defined(CONFIG_PREEMPT) && !defined(CONFIG_PREEMPT_BKL)				# define in_atomic()	((preempt_count() & ~PREEMPT_ACTIVE) != kernel_locked())				#else				# define in_atomic()	((preempt_count() & ~PREEMPT_ACTIVE) != 0)				#endif								#ifdef CONFIG_PREEMPT				# define preemptible()	(preempt_count() == 0 && !irqs_disabled())				# define IRQ_EXIT_OFFSET (HARDIRQ_OFFSET-1)				#else				# define preemptible()	0				# define IRQ_EXIT_OFFSET HARDIRQ_OFFSET				#endif								#ifdef CONFIG_SMP				extern void synchronize_irq(unsigned int irq);				#else				# define synchronize_irq(irq)	barrier()				#endif								struct task_struct;								#ifndef CONFIG_VIRT_CPU_ACCOUNTING				static inline void account_system_vtime(struct task_struct *tsk)				{				}				#endif								/*				 * It is safe to do non-atomic ops on ->hardirq_context,				 * because NMI handlers may not preempt and the ops are				 * always balanced, so the interrupted value of ->hardirq_context				 * will always be restored.				 */				#define irq_enter()					\					do {						\						account_system_vtime(current);		\						add_preempt_count(HARDIRQ_OFFSET);	\						trace_hardirq_enter();			\					} while (0)								/*				 * Exit irq context without processing softirqs:				 */				#define __irq_exit()					\					do {						\						trace_hardirq_exit();			\						account_system_vtime(current);		\						sub_preempt_count(HARDIRQ_OFFSET);	\					} while (0)								/*				 * Exit irq context and process softirqs if needed:				 */				extern void irq_exit(void);								#define nmi_enter()		do { lockdep_off(); irq_enter(); } while (0)				#define nmi_exit()		do { __irq_exit(); lockdep_on(); } while (0)								#endif /* LINUX_HARDIRQ_H */