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| author | Vineet Gupta <vgupta@synopsys.com> | 2015-10-29 15:47:57 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2019-10-28 12:12:32 -0700 |
| commit | f4e2f7cc6999943e0a649cbc4618428181aad58f (patch) | |
| tree | 096108e5cafeecd2dd1402a6e36dcb6abdf37803 /arch/arc/mm | |
| parent | 0fb1f35ed9cc2115a88cc73a02e56d288bf2aa8f (diff) | |
| download | linux-stable-f4e2f7cc6999943e0a649cbc4618428181aad58f.tar.gz linux-stable-f4e2f7cc6999943e0a649cbc4618428181aad58f.tar.bz2 linux-stable-f4e2f7cc6999943e0a649cbc4618428181aad58f.zip | |
ARC: mm: TLB Miss optim: avoid re-reading ECR
For setting PTE Dirty bit, reuse the prior test for ST miss.
No need to reload ECR and test for ST cause code as the prev
condition code is still valid (uncloberred)
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/mm')
| -rw-r--r-- | arch/arc/mm/tlbex.S | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbex.S index 110c72536e8b..4c88148d4cd1 100644 --- a/arch/arc/mm/tlbex.S +++ b/arch/arc/mm/tlbex.S @@ -380,9 +380,7 @@ ENTRY(EV_TLBMissD) ;---------------------------------------------------------------- ; UPDATE_PTE: Let Linux VM know that page was accessed/dirty - lr r3, [ecr] or r0, r0, _PAGE_ACCESSED ; Accessed bit always - btst_s r3, ECR_C_BIT_DTLB_ST_MISS ; See if it was a Write Access ? or.nz r0, r0, _PAGE_DIRTY ; if Write, set Dirty bit as well st_s r0, [r1] ; Write back PTE |