x86: mm: introduce helper function in fault.c
Impact: cleanup Introduce helper function fault_in_kernel_address() to make editors happy. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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@ -775,6 +775,15 @@ static inline int access_error(unsigned long error_code, int write,
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return 0;
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}
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static int fault_in_kernel_space(unsigned long address)
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{
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#ifdef CONFIG_X86_32
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return address >= TASK_SIZE;
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#else /* !CONFIG_X86_32 */
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return address >= TASK_SIZE64;
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#endif /* CONFIG_X86_32 */
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}
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/*
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* This routine handles page faults. It determines the address,
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* and the problem, and then passes it off to one of the appropriate
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@ -817,11 +826,7 @@ void __kprobes do_page_fault(struct pt_regs *regs, unsigned long error_code)
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* (error_code & 4) == 0, and that the fault was not a
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* protection error (error_code & 9) == 0.
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*/
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#ifdef CONFIG_X86_32
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if (unlikely(address >= TASK_SIZE)) {
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#else
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if (unlikely(address >= TASK_SIZE64)) {
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#endif
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if (unlikely(fault_in_kernel_space(address))) {
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if (!(error_code & (PF_RSVD|PF_USER|PF_PROT)) &&
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vmalloc_fault(address) >= 0)
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return;
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