From: David Daney <david.daney@xxxxxxxxxx>
This reverts commit 5890f70f15c52d0204a578422f8da828a0ba1096.
The patch was not tested, It sets PG_IEC in cpu-probe. But this value
is clobbered in tlb_init() so the system is never configured to take
the RIXI specific exceptions, and we end up in an endless loop in
handle_tlbl because that code is not expecting the XI condition.
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
---
arch/mips/kernel/traps.c | 7 -------
arch/mips/mm/tlbex.c | 4 ++--
2 files changed, 2 insertions(+), 9 deletions(-)
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index ad3d203..722ed75 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -90,7 +90,6 @@ extern asmlinkage void handle_mt(void);
extern asmlinkage void handle_dsp(void);
extern asmlinkage void handle_mcheck(void);
extern asmlinkage void handle_reserved(void);
-extern void tlb_do_page_fault_0(void);
void (*board_be_init)(void);
int (*board_be_handler)(struct pt_regs *regs, int is_fixup);
@@ -2205,12 +2204,6 @@ void __init trap_init(void)
set_except_vector(15, handle_fpe);
set_except_vector(16, handle_ftlb);
-
- if (cpu_has_rixiex) {
- set_except_vector(19, tlb_do_page_fault_0);
- set_except_vector(20, tlb_do_page_fault_0);
- }
-
set_except_vector(21, handle_msa);
set_except_vector(22, handle_mdmx);
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index 3978a3d..c9e0150 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -1934,7 +1934,7 @@ static void build_r4000_tlb_load_handler(void)
if (m4kc_tlbp_war())
build_tlb_probe_entry(&p);
- if (cpu_has_rixi && !cpu_has_rixiex) {
+ if (cpu_has_rixi) {
/*
* If the page is not _PAGE_VALID, RI or XI could not
* have triggered it. Skip the expensive test..
@@ -2001,7 +2001,7 @@ static void build_r4000_tlb_load_handler(void)
build_pte_present(&p, &r, wr.r1, wr.r2, wr.r3, label_nopage_tlbl);
build_tlb_probe_entry(&p);
- if (cpu_has_rixi && !cpu_has_rixiex) {
+ if (cpu_has_rixi) {
/*
* If the page is not _PAGE_VALID, RI or XI could not
* have triggered it. Skip the expensive test..
--
1.7.11.7
--
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