[ARM] Fix late abort handler for Thumb code.

ARM720T processors use the "late" abort option, which means we have to
correct the base address of any page fault ourselves.  However, we
were mis-correcting the thumb "push" instruction, causing the retried
instruction to fail in a spectacular way.

diff --git a/arch/arm/mm/abort-lv4t.S b/arch/arm/mm/abort-lv4t.S
index 4d808ce2ad898c3f82b802375d91561766e52986..a88596de337db74135af1edd202677f74ebdb02e 100644 (file)
--- a/arch/arm/mm/abort-lv4t.S
+++ b/arch/arm/mm/abort-lv4t.S
@@ -220,6 +220,6 @@ ENTRY(v4t_late_abort)
        and     r6, r6, #15                     @ number of regs to transfer
        and     r5, r8, #7 << 8
        ldr     r7, [sp, r5, lsr #6]
-       sub     r7, r7, r6, lsr #2              @ always decrement
+       sub     r7, r7, r6, lsl #2              @ always decrement
        str     r7, [sp, r5, lsr #6]
        mov     pc, lr