diff options
Diffstat (limited to 'arch/x86/mm/extable.c')
-rw-r--r-- | arch/x86/mm/extable.c | 31 |
1 files changed, 0 insertions, 31 deletions
diff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c index 61b41ca3b5a2..d0474ad2a6e5 100644 --- a/arch/x86/mm/extable.c +++ b/arch/x86/mm/extable.c | |||
@@ -35,34 +35,3 @@ int fixup_exception(struct pt_regs *regs) | |||
35 | 35 | ||
36 | return 0; | 36 | return 0; |
37 | } | 37 | } |
38 | |||
39 | #ifdef CONFIG_X86_64 | ||
40 | /* | ||
41 | * Need to defined our own search_extable on X86_64 to work around | ||
42 | * a B stepping K8 bug. | ||
43 | */ | ||
44 | const struct exception_table_entry * | ||
45 | search_extable(const struct exception_table_entry *first, | ||
46 | const struct exception_table_entry *last, | ||
47 | unsigned long value) | ||
48 | { | ||
49 | /* B stepping K8 bug */ | ||
50 | if ((value >> 32) == 0) | ||
51 | value |= 0xffffffffUL << 32; | ||
52 | |||
53 | while (first <= last) { | ||
54 | const struct exception_table_entry *mid; | ||
55 | long diff; | ||
56 | |||
57 | mid = (last - first) / 2 + first; | ||
58 | diff = mid->insn - value; | ||
59 | if (diff == 0) | ||
60 | return mid; | ||
61 | else if (diff < 0) | ||
62 | first = mid+1; | ||
63 | else | ||
64 | last = mid-1; | ||
65 | } | ||
66 | return NULL; | ||
67 | } | ||
68 | #endif | ||