Commit 20dda87b authored by John David Anglin's avatar John David Anglin Committed by Helge Deller
Browse files

parisc: Enhance page fault termination message 



In debugging kernel panics, I believe it is useful to know what type
of page fault caused the termination. "Bad Address" is too vague.

Signed-off-by: default avatarJohn David Anglin <dave.anglin@bell.net>
Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent 9d90a908

arch/parisc/mm/fault.c

+10 −4
Original line number Diff line number Diff line
@@ -266,11 +266,14 @@ void do_page_fault(struct pt_regs *regs, unsigned long code, 
	unsigned long acc_type;

	vm_fault_t fault = 0;

	unsigned int flags;

	char *msg;



	tsk = current;

	mm = tsk->mm;

	if (!mm)

	if (!mm) {

		msg = "Page fault: no context";

		goto no_context;

	}



	flags = FAULT_FLAG_DEFAULT;

	if (user_mode(regs))
@@ -406,6 +409,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long code, 
		force_sig_fault(signo, si_code, (void __user *) address);

		return;

	}

	msg = "Page fault: bad address";



no_context:
@@ -413,11 +417,13 @@ void do_page_fault(struct pt_regs *regs, unsigned long code, 
		return;

	}



	parisc_terminate("Bad Address (null pointer deref?)", regs, code, address);

	parisc_terminate(msg, regs, code, address);



out_of_memory:

	mmap_read_unlock(mm);

	if (!user_mode(regs))

	if (!user_mode(regs)) {

		msg = "Page fault: out of memory";

		goto no_context;

	}

	pagefault_out_of_memory();

}