[PATCH 2/2] [Zesty] UBUNTU: SAUCE: powerpc/mm/radix: Remove unnecessary ptesync

[Breno Leitao]

From: "Aneesh Kumar K.V" <aneesh.kumar at linux.vnet.ibm.com>

BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1681429

For a tlbiel with pid, we need to issue tlbiel with set number encoded. We
don't need to do ptesync for each of those. Instead we need one for the entire
tlbiel pid operation.

Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>
Acked-by: Anton Blanchard <anton at samba.org>
Signed-off-by: Breno Leitao <breno.leitao at gmail.com>
---
 arch/powerpc/mm/tlb-radix.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c
index 74f17e3c7cbe..93c9d8080b2a 100644
--- a/arch/powerpc/mm/tlb-radix.c
+++ b/arch/powerpc/mm/tlb-radix.c
@@ -34,10 +34,8 @@ static inline void __tlbiel_pid(unsigned long pid, int set,
 	prs = 1; /* process scoped */
 	r = 1;   /* raidx format */
 
-	asm volatile("ptesync": : :"memory");
 	asm volatile(PPC_TLBIEL(%0, %4, %3, %2, %1)
 		     : : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
-	asm volatile("ptesync": : :"memory");
 }
 
 /*
@@ -47,9 +45,11 @@ static inline void _tlbiel_pid(unsigned long pid, unsigned long ric)
 {
 	int set;
 
+	asm volatile("ptesync": : :"memory");
 	for (set = 0; set < POWER9_TLB_SETS_RADIX ; set++) {
 		__tlbiel_pid(pid, set, ric);
 	}
+	asm volatile("ptesync": : :"memory");
 	asm volatile(PPC_INVALIDATE_ERAT "; isync" : : :"memory");
 }
 
-- 
2.11.0