| From 17165f66a8a6b2e5a7e7bd9c10aaadda4805877d Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Sat, 15 Sep 2018 01:30:45 +1000 |
| Subject: powerpc/64s/hash: Fix stab_rr off by one initialization |
| |
| 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 9f574e59d1786..2f162c6e52d4f 100644 |
| --- a/arch/powerpc/mm/slb.c |
| +++ b/arch/powerpc/mm/slb.c |
| @@ -355,7 +355,7 @@ 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 |
| |
