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ARC: [ASID] activate_mm() == switch_mm() 

ASID allocation changes/2

Use the fact that switch_mm() and activate_mm() are exactly same code
now while acknowledging the semantical difference in comment

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2013-07-24 17:31:08 -07:00
parent 3daa48d1d9
commit c60115537c
1 changed files with 9 additions and 11 deletions
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20
arch/arc/include/asm/mmu_context.h
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@ -156,6 +156,15 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
get_new_mmu_context(next); get_new_mmu_context(next);
} }
/*
* Called at the time of execve() to get a new ASID
* Note the subtlety here: get_new_mmu_context() behaves differently here
* vs. in switch_mm(). Here it always returns a new ASID, because mm has
* an unallocated "initial" value, while in latter, it moves to a new ASID,
* only if it was unallocated
*/
#define activate_mm(prev, next) switch_mm(prev, next, NULL)
static inline void destroy_context(struct mm_struct *mm) static inline void destroy_context(struct mm_struct *mm)
{ {
unsigned long flags; unsigned long flags;
@ -177,17 +186,6 @@ static inline void destroy_context(struct mm_struct *mm)
*/ */
#define deactivate_mm(tsk, mm) do { } while (0) #define deactivate_mm(tsk, mm) do { } while (0)
static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
{
#ifndef CONFIG_SMP
write_aux_reg(ARC_REG_SCRATCH_DATA0, next->pgd);
#endif
/* Unconditionally get a new ASID */
get_new_mmu_context(next);
}
#define enter_lazy_tlb(mm, tsk) #define enter_lazy_tlb(mm, tsk)
#endif /* __ASM_ARC_MMU_CONTEXT_H */ #endif /* __ASM_ARC_MMU_CONTEXT_H */