diff options
| author | Harvey Harrison <harvey.harrison@gmail.com> | 2008-01-30 13:34:11 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:34:11 +0100 |
| commit | b406ac61e94875723540bd56e26f634afdeef489 (patch) | |
| tree | 66efba6274ad0c3e45b8d42226a78725173c578c | |
| parent | c61e211d9989e4c112d3d58db12ad58f9016a3c8 (diff) | |
x86: remove nx_enabled from fault.c
On !PAE 32-bit, _PAGE_NX will be 0, making is_prefetch always
return early. The test is sufficient on PAE as __supported_pte_mask
is updated in the same places as nx_enabled in init_32.c which also
takes disable_nx into account.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | arch/x86/mm/fault.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 14a0c6e541de..99d273dbc758 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -92,18 +92,13 @@ static int is_prefetch(struct pt_regs *regs, unsigned long addr, unsigned char *max_instr; #ifdef CONFIG_X86_32 -# ifdef CONFIG_X86_PAE - /* If it was a exec fault on NX page, ignore */ - if (nx_enabled && (error_code & PF_INSTR)) + if (!(__supported_pte_mask & _PAGE_NX)) return 0; -# else - return 0; -# endif -#else /* CONFIG_X86_64 */ +#endif + /* If it was a exec fault on NX page, ignore */ if (error_code & PF_INSTR) return 0; -#endif instr = (unsigned char *)convert_ip_to_linear(current, regs); max_instr = instr + 15; |