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Subject[PATCH AUTOSEL 4.4 05/40] powerpc/64s/hash: Fix stab_rr off by one initialization
Date
From: Nicholas Piggin <npiggin@gmail.com>

[ Upstream commit 09b4438db13fa83b6219aee5993711a2aa2a0c64 ]

This causes SLB alloation to start 1 beyond the start of the SLB.
There is no real problem because after it wraps it stats behaving
properly, it's just surprisig to see when looking at SLB traces.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/powerpc/mm/slb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/slb.c b/arch/powerpc/mm/slb.c
index 309027208f7c0..27f00a7c1085f 100644
--- a/arch/powerpc/mm/slb.c
+++ b/arch/powerpc/mm/slb.c
@@ -322,7 +322,7 @@ void slb_initialize(void)
#endif
}

- get_paca()->stab_rr = SLB_NUM_BOLTED;
+ get_paca()->stab_rr = SLB_NUM_BOLTED - 1;

lflags = SLB_VSID_KERNEL | linear_llp;
vflags = SLB_VSID_KERNEL | vmalloc_llp;
--
2.20.1
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