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Commit c6011553 authored by Vineet Gupta's avatar Vineet Gupta
Browse files

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: default avatarVineet Gupta <vgupta@synopsys.com>
parent 3daa48d1

arch/arc/include/asm/mmu_context.h

+9 −11
Original line number Original line Diff line number Diff line
@@ -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 */