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(int cpu) { } 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 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 39 static inline bool arch_pgtable_dma_compat(struct mm_struct *mm) 40 { 41 return true; 42 } 43 #endif 44 45 #endif 46