Commit 9d90a908 authored by John David Anglin's avatar John David Anglin Committed by Helge Deller
Browse files

parisc: Don't call faulthandler_disabled() in do_page_fault() 



It is dangerous to call faulthandler_disabled() when user_mode(regs)
is true.  The task pagefault_disabled counter is racy and it is not
updated atomically on parisc. As a result, calling faulthandler_disabled()
may cause erroneous termination.

We now handle execption fixups and termination when user_mode(regs) is
false in handle_interruption(). Thus, we can just remove the
faulthandler_disabled() check from do_page_fault().

Signed-off-by: default avatarJohn David Anglin <dave.anglin@bell.net>
Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent 4b9d2a73

arch/parisc/mm/fault.c

+0 −3
Original line number Diff line number Diff line
@@ -267,9 +267,6 @@ void do_page_fault(struct pt_regs *regs, unsigned long code, 
	vm_fault_t fault = 0;

	unsigned int flags;



	if (faulthandler_disabled())

		goto no_context;



	tsk = current;

	mm = tsk->mm;

	if (!mm)