5  *  Derived from "arch/i386/mm/fault.c"
158 		     vm_fault_t fault)  in do_sigbus()  argument
173 	if (fault & (VM_FAULT_HWPOISON|VM_FAULT_HWPOISON_LARGE)) {  in do_sigbus()
174 		pr_err("MCE: Killing %s:%d due to hardware memory corruption fault at %lx\n",  in do_sigbus()
179 	if (fault & VM_FAULT_HWPOISON_LARGE)  in do_sigbus()
180 		lsb = hstate_index_to_shift(VM_FAULT_GET_HINDEX(fault));  in do_sigbus()
181 	if (fault & VM_FAULT_HWPOISON)  in do_sigbus()
190 				vm_fault_t fault)  in mm_fault_error()  argument
193 	 * Kernel page fault interrupted by SIGKILL. We have no reason to  in mm_fault_error()
200 	if (fault & VM_FAULT_OOM) {  in mm_fault_error()
203 		 * made us unable to handle the page fault gracefully.  in mm_fault_error()
209 		if (fault & (VM_FAULT_SIGBUS|VM_FAULT_HWPOISON|  in mm_fault_error()
211 			return do_sigbus(regs, addr, fault);  in mm_fault_error()
212 		else if (fault & VM_FAULT_SIGSEGV)  in mm_fault_error()
220 /* Is this a bad kernel fault ? */
254 		/* get user regs even if this fault is in kernel mode */  in bad_stack_expansion()
320 	 * fault path, handle_mm_fault() also does the same check. To avoid  in access_error()
351 	 * fault instead of DSISR_PROTFAULT.  in sanity_check_fault()
360 	 * sync between D/I cache via fault. But that is handled via low level  in sanity_check_fault()
361 	 * hash fault code (hash_page_do_lazy_icache()) and we should not reach  in sanity_check_fault()
370 	 * set_pte_at while taking the noexec/prot fault. Hence this is WARN_ON  in sanity_check_fault()
373 	 * For radix, we can get prot fault for autonuma case, because radix  in sanity_check_fault()
403  * for a data fault, SRR1 for an instruction fault. For 400-family processors
404  * the error_code parameter is ESR for a data fault, 0 for an instruction
405  * fault.
407  *  - DSISR for a non-SLB data access fault,
408  *  - SRR1 & 0x08000000 for a non-SLB instruction access fault
409  *  - 0 any SLB fault.
411  * The return value is 0 if the fault was handled, or the signal
412  * number if this is a kernel fault that can't be handled here.
423 	vm_fault_t fault, major = 0;  in __do_page_fault()  local
441 	 * The kernel should never take an execute fault nor should it  in __do_page_fault()
442 	 * take a page fault to a kernel address.  in __do_page_fault()
449 	 * in a region with pagefaults disabled then we must not take the fault  in __do_page_fault()
453 			printk_ratelimited(KERN_ERR "Page fault in user mode"  in __do_page_fault()
472 	 * can result in fault, which will cause a deadlock when called with  in __do_page_fault()
485 	 * erroneous fault occurring in a code path which already holds mmap_sem  in __do_page_fault()
486 	 * we will deadlock attempting to validate the fault against the  in __do_page_fault()
542 	 * If for any reason at all we couldn't handle the fault,  in __do_page_fault()
544 	 * the fault.  in __do_page_fault()
546 	fault = handle_mm_fault(vma, address, flags);  in __do_page_fault()
553 	if (unlikely(fault & VM_FAULT_SIGSEGV) &&  in __do_page_fault()
563 	major |= fault & VM_FAULT_MAJOR;  in __do_page_fault()
569 	if (unlikely(fault & VM_FAULT_RETRY)) {  in __do_page_fault()
591 	if (unlikely(fault & VM_FAULT_ERROR))  in __do_page_fault()
592 		return mm_fault_error(regs, address, fault);  in __do_page_fault()
595 	 * Major/minor page fault accounting.  in __do_page_fault()
628 	/* Are we prepared to handle this fault?  */  in bad_page_fault()
653 		pr_alert("BUG: Unable to handle unknown paging fault at 0x%08lx\n",  in bad_page_fault()