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Commit 438e69b5 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman
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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: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Tested-by: default avatarMichael Neuling <mikey@neuling.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent f4894b80

arch/powerpc/include/asm/book3s/64/radix.h

+0 −3
Original line number Diff line number Diff line
@@ -144,13 +144,11 @@ static inline unsigned long radix__pte_update(struct mm_struct *mm, 
		 * 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 @@ static inline void radix__ptep_set_access_flags(struct mm_struct *mm, 
		unsigned long old_pte, new_pte;



		old_pte = __radix_pte_update(ptep, ~0, 0);

		asm volatile("ptesync" : : : "memory");

		/*

		 * new value of pte

		 */