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authorVineet Gupta <vgupta@synopsys.com>2013-07-24 17:31:08 -0700
committerVineet Gupta <vgupta@synopsys.com>2013-08-30 21:42:19 +0530
commitc60115537c96d78a884d2a4bd78839a57266d48b (patch)
tree2ff332c464de8da643377e74609a47a371233248 /arch/arc/include
parent3daa48d1d9bc44baa079d65e72ef2e3f1139ac03 (diff)
downloadlinux-c60115537c96d78a884d2a4bd78839a57266d48b.tar.bz2
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/include')
-rw-r--r--arch/arc/include/asm/mmu_context.h20
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 */