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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-07-25 02:31:08 +0200 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-08-30 18:12:19 +0200 |
| commit | c60115537c96d78a884d2a4bd78839a57266d48b (patch) | |
| tree | 2ff332c464de8da643377e74609a47a371233248 /arch/arc | |
| parent | ARC: [ASID] get_new_mmu_context() to conditionally allocate new ASID (diff) | |
| download | linux-c60115537c96d78a884d2a4bd78839a57266d48b.tar.xz linux-c60115537c96d78a884d2a4bd78839a57266d48b.zip | |
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>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/mmu_context.h | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/arch/arc/include/asm/mmu_context.h b/arch/arc/include/asm/mmu_context.h index 7a3ecd25ffc9..9b09d18f01b3 100644 --- a/arch/arc/include/asm/mmu_context.h +++ b/arch/arc/include/asm/mmu_context.h @@ -156,6 +156,15 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *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) { unsigned long flags; @@ -177,17 +186,6 @@ static inline void destroy_context(struct mm_struct *mm) */ #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) #endif /* __ASM_ARC_MMU_CONTEXT_H */ |