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@xxxxxxxx>
---
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 499e2e8f7f34..147868427b7c 100644
--- 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 @@ 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:
+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();
}
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