powerpc/64: Fix bug in setting floating-point exception mode

When loading up the FPU, we were using a 'ld' (load doubleword)
instruction to get the FP exception mode from the thread_struct,
but it's only an int field.  This changes the ld to lwz (load
word and zero-extend).

Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/kernel/fpu.S b/arch/powerpc/kernel/fpu.S
index e4362df..340730f 100644 (file)
--- a/arch/powerpc/kernel/fpu.S
+++ b/arch/powerpc/kernel/fpu.S
@@ -66,7 +66,7 @@ _GLOBAL(load_up_fpu)
 #else
        ld      r4,PACACURRENT(r13)
        addi    r5,r4,THREAD            /* Get THREAD */
 #else
        ld      r4,PACACURRENT(r13)
        addi    r5,r4,THREAD            /* Get THREAD */

-       ld      r4,THREAD_FPEXC_MODE(r5)
+       lwz     r4,THREAD_FPEXC_MODE(r5)

        ori     r12,r12,MSR_FP
        or      r12,r12,r4
        std     r12,_MSR(r1)
        ori     r12,r12,MSR_FP
        or      r12,r12,r4
        std     r12,_MSR(r1)