[linux-block.git] / include / linux / mmu_context.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_MMU_CONTEXT_H
#define _LINUX_MMU_CONTEXT_H

#include <asm/mmu_context.h>
#include <asm/mmu.h>

/* Architectures that care about IRQ state in switch_mm can override this. */
#ifndef switch_mm_irqs_off
# define switch_mm_irqs_off switch_mm
#endif

#ifndef leave_mm
static inline void leave_mm(void) { }
#endif

/*
 * CPUs that are capable of running user task @p. Must contain at least one
 * active CPU. It is assumed that the kernel can run on all CPUs, so calling
 * this for a kernel thread is pointless.
 *
 * By default, we assume a sane, homogeneous system.
 */
#ifndef task_cpu_possible_mask
# define task_cpu_possible_mask(p)	cpu_possible_mask
# define task_cpu_possible(cpu, p)	true
# define task_cpu_fallback_mask(p)	housekeeping_cpumask(HK_TYPE_TICK)
#else
# define task_cpu_possible(cpu, p)	cpumask_test_cpu((cpu), task_cpu_possible_mask(p))
#endif

#ifndef mm_untag_mask
static inline unsigned long mm_untag_mask(struct mm_struct *mm)
{
	return -1UL;
}
#endif

#ifndef arch_pgtable_dma_compat
static inline bool arch_pgtable_dma_compat(struct mm_struct *mm)
{
	return true;
}
#endif

#endif
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _LINUX_MMU_CONTEXT_H
	3	#define _LINUX_MMU_CONTEXT_H
	4
	5	#include <asm/mmu_context.h>
	6	#include <asm/mmu.h>
	7
	8	/* Architectures that care about IRQ state in switch_mm can override this. */
	9	#ifndef switch_mm_irqs_off
	10	# define switch_mm_irqs_off switch_mm
	11	#endif
	12
	13	#ifndef leave_mm
	14	static inline void leave_mm(void) { }
	15	#endif
	16
	17	/*
	18	* CPUs that are capable of running user task @p. Must contain at least one
	19	* active CPU. It is assumed that the kernel can run on all CPUs, so calling
	20	* this for a kernel thread is pointless.
	21	*
	22	* By default, we assume a sane, homogeneous system.
	23	*/
	24	#ifndef task_cpu_possible_mask
	25	# define task_cpu_possible_mask(p) cpu_possible_mask
	26	# define task_cpu_possible(cpu, p) true
	27	# define task_cpu_fallback_mask(p) housekeeping_cpumask(HK_TYPE_TICK)
	28	#else
	29	# define task_cpu_possible(cpu, p) cpumask_test_cpu((cpu), task_cpu_possible_mask(p))
	30	#endif
	31
	32	#ifndef mm_untag_mask
	33	static inline unsigned long mm_untag_mask(struct mm_struct *mm)
	34	{
	35	return -1UL;
	36	}
	37	#endif
	38
	39	#ifndef arch_pgtable_dma_compat
	40	static inline bool arch_pgtable_dma_compat(struct mm_struct *mm)
	41	{
	42	return true;
	43	}
	44	#endif
	45
	46	#endif