path: root/arch/mips/mm/tlbex.c
diff options
authorDavid Daney <david.daney@cavium.com>2011-09-16 18:06:02 -0700
committerRalf Baechle <ralf@linux-mips.org>2011-09-21 17:54:07 +0200
commit0f4ccbc835036cbcc2513585bb2e93ee62e12674 (patch)
treef70b98675abd1d6dbdd28c30863d9ea09e31d8db /arch/mips/mm/tlbex.c
parentd968275921f9fa7fbc602ac6618ffec6a062ee3c (diff)
MIPS: No branches in delay slots for huge pages in handle_tlbl
For the case PM_DEFAULT_MASK == 0, we were placing a branch in the delay slot of another branch. This leads to undefined behavior. Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2775/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm/tlbex.c')
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index 46f33c7c1a0..e06370f58ef 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -1962,7 +1962,8 @@ static void __cpuinit build_r4000_tlb_load_handler(void)
uasm_i_andi(&p, wr.r3, wr.r3, 2);
uasm_il_beqz(&p, &r, wr.r3, label_tlbl_goaround2);
+ if (PM_DEFAULT_MASK == 0)
+ uasm_i_nop(&p);
* We clobbered C0_PAGEMASK, restore it. On the other branch
* it is restored in build_huge_tlb_write_entry.