signal/microblaze: Use force_sig_fault where appropriate

Filling in struct siginfo before calling force_sig_info a tedious and
error prone process, where once in a great while the wrong fields
are filled out, and siginfo has been inconsistently cleared.

Simplify this process by using the helper force_sig_fault.  Which
takes as a parameters all of the information it needs, ensures
all of the fiddly bits of filling in struct siginfo are done properly
and then calls force_sig_info.

In short about a 5 line reduction in code for every time force_sig_info
is called, which makes the calling function clearer.

Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

arch/microblaze/kernel/exceptions.c

@@ -60,17 +60,10 @@ asmlinkage void sw_exception(struct pt_regs *regs)
 
 void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
 {
-	siginfo_t info;
-
 	if (kernel_mode(regs))
 		die("Exception in kernel mode", regs, signr);
 
-	clear_siginfo(&info);
-	info.si_signo = signr;
-	info.si_errno = 0;
-	info.si_code = code;
-	info.si_addr = (void __user *) addr;
-	force_sig_info(signr, &info, current);
+	force_sig_fault(signr, code, (void __user *)addr, current);
 }
 
 asmlinkage void full_exception(struct pt_regs *regs, unsigned int type,

arch/microblaze/mm/fault.c

@@ -289,14 +289,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
 do_sigbus:
 	up_read(&mm->mmap_sem);
 	if (user_mode(regs)) {
-		siginfo_t info;
-
-		clear_siginfo(&info);
-		info.si_signo = SIGBUS;
-		info.si_errno = 0;
-		info.si_code = BUS_ADRERR;
-		info.si_addr = (void __user *)address;
-		force_sig_info(SIGBUS, &info, current);
+		force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)address, current);
 		return;
 	}
 	bad_page_fault(regs, address, SIGBUS);