3  *  linux/arch/arm/mm/fault.c
26 #include "fault.h"
149 	 * Are we prepared to handle this kernel fault?  in __do_kernel_fault()
187 		pr_err("%s: unhandled page fault (%d) at 0x%08lx, code 0x%03x\n",  in __do_user_fault()
213 	 * have no context to handle this fault with.  in do_bad_area()
244 	vm_fault_t fault;  in do_page_fault()  local
258 	 * context, we must not take the fault..  in do_page_fault()
292 	fault = handle_mm_fault(vma, addr, flags | FAULT_FLAG_VMA_LOCK, regs);  in do_page_fault()
293 	if (!(fault & (VM_FAULT_RETRY | VM_FAULT_COMPLETED)))  in do_page_fault()
296 	if (!(fault & VM_FAULT_RETRY)) {  in do_page_fault()
301 	if (fault & VM_FAULT_MAJOR)  in do_page_fault()
305 	if (fault_signal_pending(fault, regs)) {  in do_page_fault()
315 		fault = VM_FAULT_BADMAP;  in do_page_fault()
321 	 * permissions on the VMA allow for the fault which occurred.  in do_page_fault()
324 		fault = VM_FAULT_BADACCESS;  in do_page_fault()
326 		fault = handle_mm_fault(vma, addr & PAGE_MASK, flags, regs);  in do_page_fault()
332 	if (fault_signal_pending(fault, regs)) {  in do_page_fault()
338 	/* The fault is fully completed (including releasing mmap lock) */  in do_page_fault()
339 	if (fault & VM_FAULT_COMPLETED)  in do_page_fault()
342 	if (!(fault & VM_FAULT_ERROR)) {  in do_page_fault()
343 		if (fault & VM_FAULT_RETRY) {  in do_page_fault()
355 	if (likely(!(fault & (VM_FAULT_ERROR | VM_FAULT_BADMAP | VM_FAULT_BADACCESS))))  in do_page_fault()
361 	 * have no context to handle this fault with.  in do_page_fault()
366 	if (fault & VM_FAULT_OOM) {  in do_page_fault()
369 		 * userspace (which will retry the fault, or kill us if we  in do_page_fault()
376 	if (fault & VM_FAULT_SIGBUS) {  in do_page_fault()
379 		 * successfully fix up this page fault.  in do_page_fault()
389 		code = fault == VM_FAULT_BADACCESS ?  in do_page_fault()
409  * First Level Translation Fault Handler
515  * This abort handler always returns "fault".
562 	pr_alert("Unhandled fault: %s (0x%03x) at 0x%08lx\n",  in do_DataAbort()
625 				"I-cache maintenance fault");  in exceptions_init()
634 				"section access flag fault");  in exceptions_init()
636 				"section access flag fault");  in exceptions_init()