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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-04-04 00:33:49 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-04-04 00:33:49 +0100 |
| commit | bce5669be3a8946952258a064ef26defeb887138 (patch) | |
| tree | 117386b9909882c000f822011c5ea6fdcbab3273 /arch/x86/mm/fault.c | |
| parent | 95959e6a06720834fc80a210e37898341c63cb91 (diff) | |
| parent | 566b60c04ab230b8cc3845f964306f99504b18df (diff) | |
Merge branch 'devel-stable' into for-next
Diffstat (limited to 'arch/x86/mm/fault.c')
| -rw-r--r-- | arch/x86/mm/fault.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 9d591c895803..6dea040cc3a1 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -1001,6 +1001,12 @@ static int fault_in_kernel_space(unsigned long address) static inline bool smap_violation(int error_code, struct pt_regs *regs) { + if (!IS_ENABLED(CONFIG_X86_SMAP)) + return false; + + if (!static_cpu_has(X86_FEATURE_SMAP)) + return false; + if (error_code & PF_USER) return false; @@ -1087,11 +1093,9 @@ __do_page_fault(struct pt_regs *regs, unsigned long error_code) if (unlikely(error_code & PF_RSVD)) pgtable_bad(regs, error_code, address); - if (static_cpu_has(X86_FEATURE_SMAP)) { - if (unlikely(smap_violation(error_code, regs))) { - bad_area_nosemaphore(regs, error_code, address); - return; - } + if (unlikely(smap_violation(error_code, regs))) { + bad_area_nosemaphore(regs, error_code, address); + return; } /* |