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: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 499e2e8..1478684 100644 (file)
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -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 @@ bad_area:
                force_sig_fault(signo, si_code, (void __user *) address);
                return;
        }
+       msg = "Page fault: bad address";
 
 no_context:
 
@@ -413,11 +417,13 @@ no_context:
                return;
        }
 
-       parisc_terminate("Bad Address (null pointer deref?)", regs, code, address);
+       parisc_terminate(msg, regs, code, address);
 
-  out_of_memory:
+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();
 }