signal: Remove the task parameter from force_sig_fault

As synchronous exceptions really only make sense against the current
task (otherwise how are you synchronous) remove the task parameter
from from force_sig_fault to make it explicit that is what is going
on.

The two known exceptions that deliver a synchronous exception to a
stopped ptraced task have already been changed to
force_sig_fault_to_task.

The callers have been changed with the following emacs regular expression
(with obvious variations on the architectures that take more arguments)
to avoid typos:

force_sig_fault[(]\([^,]+\)[,]\([^,]+\)[,]\([^,]+\)[,]\W+current[)]
->
force_sig_fault(\1,\2,\3)

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

arch/microblaze/kernel/exceptions.c

@@ -63,7 +63,7 @@ void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
 	if (kernel_mode(regs))
 		die("Exception in kernel mode", regs, signr);
 
-	force_sig_fault(signr, code, (void __user *)addr, current);
+	force_sig_fault(signr, code, (void __user *)addr);
 }
 
 asmlinkage void full_exception(struct pt_regs *regs, unsigned int type,

arch/microblaze/mm/fault.c

@@ -289,7 +289,7 @@ out_of_memory:
 do_sigbus:
 	up_read(&mm->mmap_sem);
 	if (user_mode(regs)) {
-		force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)address, current);
+		force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)address);
 		return;
 	}
 	bad_page_fault(regs, address, SIGBUS);