[PATCH 3.12 070/142] MIPS: tlbex: Fix a missing statement for HUGETLB

[Jiri Slaby]

From: Huacai Chen <chenhc@xxxxxxxxxx>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 8393c524a25609a30129e4a8975cf3b91f6c16a5 upstream.

In commit 2c8c53e28f1 (MIPS: Optimize TLB handlers for Octeon CPUs)
build_r4000_tlb_refill_handler() is modified. But it doesn't compatible
with the original code in HUGETLB case. Because there is a copy & paste
error and one line of code is missing. It is very easy to produce a bug
with LTP's hugemmap05 test.

Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx>
Signed-off-by: Binbin Zhou <zhoubb@xxxxxxxxxx>
Cc: John Crispin <john@xxxxxxxxxxx>
Cc: Steven J. Hill <Steven.Hill@xxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: Fuxin Zhang <zhangfx@xxxxxxxxxx>
Cc: Zhangjin Wu <wuzhangjin@xxxxxxxxx>
Patchwork: https://patchwork.linux-mips.org/patch/7496/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
 arch/mips/mm/tlbex.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index 9bb3a9363b06..db7a050f5c2c 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -1333,6 +1333,7 @@ static void build_r4000_tlb_refill_handler(void)
 	}
 #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
 	uasm_l_tlb_huge_update(&l, p);
+	UASM_i_LW(&p, K0, 0, K1);
 	build_huge_update_entries(&p, htlb_info.huge_pte, K1);
 	build_huge_tlb_write_entry(&p, &l, &r, K0, tlb_random,
 				   htlb_info.restore_scratch);
-- 
2.1.0

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