From: David Daney <david.da...@cavium.com>
It wasn't being saved on task switch.
Signed-off-by: David Daney <david.da...@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.maka...@auriga.com>
---
arch/mips/kernel/octeon_switch.S | 19 +++++++------------
1 file changed, 7 insertions(+), 12 deletions(-)
diff --git a/arch/mips/kernel/octeon_switch.S b/arch/mips/kernel/octeon_switch.S
index 3dec1e8..2787c01 100644
--- a/arch/mips/kernel/octeon_switch.S
+++ b/arch/mips/kernel/octeon_switch.S
@@ -31,15 +31,11 @@
/*
* check if we need to save FPU registers
*/
- PTR_L t3, TASK_THREAD_INFO(a0)
- LONG_L t0, TI_FLAGS(t3)
- li t1, _TIF_USEDFPU
- and t2, t0, t1
- beqz t2, 1f
- nor t1, zero, t1
-
- and t0, t0, t1
- LONG_S t0, TI_FLAGS(t3)
+ .set push
+ .set noreorder
+ beqz a3, 1f
+ PTR_L t3, TASK_THREAD_INFO(a0)
+ .set pop
/*
* clear saved user stack CU1 bit
@@ -57,14 +53,13 @@
1:
/* check if we need to save COP2 registers */
- PTR_L t2, TASK_THREAD_INFO(a0)
- LONG_L t0, ST_OFF(t2)
+ LONG_L t0, ST_OFF(t3)
bbit0 t0, 30, 1f
/* Disable COP2 in the stored process state */
li t1, ST0_CU2
xor t0, t1
- LONG_S t0, ST_OFF(t2)
+ LONG_S t0, ST_OFF(t3)
/* Enable COP2 so we can save it */
mfc0 t0, CP0_STATUS
--
2.1.3
--
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