x86: prefetch fix #2
Linus noticed a second bug and an uncleanliness:
- we'd return on any instruction fetch fault
- we'd use both the value of 16 and the PF_INSTR symbol which are
the same and make no sense
the cleanup nicely unifies this piece of logic.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index c0c82bc..ec08d83 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -91,13 +91,10 @@
int prefetch = 0;
unsigned char *max_instr;
-#ifdef CONFIG_X86_32
- /* Catch an obscure case of prefetch inside an NX page: */
- if ((__supported_pte_mask & _PAGE_NX) && (error_code & 16))
- return 0;
-#endif
-
- /* If it was a exec fault on NX page, ignore */
+ /*
+ * If it was a exec (instruction fetch) fault on NX page, then
+ * do not ignore the fault:
+ */
if (error_code & PF_INSTR)
return 0;