powerpc/mm/radix: Skip ptesync in pte update helpers
We do them at the start of tlb flush, and we are sure a pte update will be
followed by a tlbflush. Hence we can skip the ptesync in pte update helpers.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Tested-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/include/asm/book3s/64/radix.h b/arch/powerpc/include/asm/book3s/64/radix.h
index 10a2900..9e0bb7c 100644
--- a/arch/powerpc/include/asm/book3s/64/radix.h
+++ b/arch/powerpc/include/asm/book3s/64/radix.h
@@ -144,13 +144,11 @@
* new value of pte
*/
new_pte = (old_pte | set) & ~clr;
- asm volatile("ptesync" : : : "memory");
radix__flush_tlb_pte_p9_dd1(old_pte, mm, addr);
if (new_pte)
__radix_pte_update(ptep, 0, new_pte);
} else
old_pte = __radix_pte_update(ptep, clr, set);
- asm volatile("ptesync" : : : "memory");
if (!huge)
assert_pte_locked(mm, addr);
@@ -195,7 +193,6 @@
unsigned long old_pte, new_pte;
old_pte = __radix_pte_update(ptep, ~0, 0);
- asm volatile("ptesync" : : : "memory");
/*
* new value of pte
*/