diff options
Diffstat (limited to 'arch/arm64/include/asm/mmu.h')
| -rw-r--r-- | arch/arm64/include/asm/mmu.h | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h index 030208767..990124a67 100644 --- a/arch/arm64/include/asm/mmu.h +++ b/arch/arm64/include/asm/mmu.h @@ -17,15 +17,16 @@ #define __ASM_MMU_H typedef struct { - unsigned int id; - raw_spinlock_t id_lock; - void *vdso; + atomic64_t id; + void *vdso; } mm_context_t; -#define INIT_MM_CONTEXT(name) \ - .context.id_lock = __RAW_SPIN_LOCK_UNLOCKED(name.context.id_lock), - -#define ASID(mm) ((mm)->context.id & 0xffff) +/* + * This macro is only used by the TLBI code, which cannot race with an + * ASID change and therefore doesn't need to reload the counter using + * atomic64_read. + */ +#define ASID(mm) ((mm)->context.id.counter & 0xffff) extern void paging_init(void); extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt); |