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
leave_mm(void)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 #else
28 # define task_cpu_possible(cpu, p)	cpumask_test_cpu((cpu), task_cpu_possible_mask(p))
29 #endif
30 
31 #ifndef mm_untag_mask
mm_untag_mask(struct mm_struct * mm)32 static inline unsigned long mm_untag_mask(struct mm_struct *mm)
33 {
34 	return -1UL;
35 }
36 #endif
37 
38 #ifndef arch_pgtable_dma_compat
arch_pgtable_dma_compat(struct mm_struct * mm)39 static inline bool arch_pgtable_dma_compat(struct mm_struct *mm)
40 {
41 	return true;
42 }
43 #endif
44 
45 #endif
46