[ARM] do_bad_area() always takes current and current->active_mm

Since do_bad_area() always takes the currently active task and
(supposed to) take the currently active MM, there's no point passing
them to this function.  Instead, obtain references to them inside
do_bad_area().
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mm/alignment.c

@@ -735,7 +735,7 @@ do_alignment(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 	/*
 	 * We got a fault - fix it up, or die.
 	 */
-	do_bad_area(current, current->mm, addr, fsr, regs);
+	do_bad_area(addr, fsr, regs);
 	return 0;
 
  swp:

arch/arm/mm/fault.c

@@ -131,10 +131,11 @@ __do_user_fault(struct task_struct *tsk, unsigned long addr,
 	force_sig_info(sig, &si, tsk);
 }
 
-void
-do_bad_area(struct task_struct *tsk, struct mm_struct *mm, unsigned long addr,
-	    unsigned int fsr, struct pt_regs *regs)
+void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 {
+	struct task_struct *tsk = current;
+	struct mm_struct *mm = tsk->active_mm;
+
 	/*
 	 * If we are in kernel mode at this point, we
 	 * have no context to handle this fault with.
@@ -319,7 +320,6 @@ static int
 do_translation_fault(unsigned long addr, unsigned int fsr,
 		     struct pt_regs *regs)
 {
-	struct task_struct *tsk;
 	unsigned int index;
 	pgd_t *pgd, *pgd_k;
 	pmd_t *pmd, *pmd_k;
@@ -351,9 +351,7 @@ do_translation_fault(unsigned long addr, unsigned int fsr,
 	return 0;
 
 bad_area:
-	tsk = current;
-
-	do_bad_area(tsk, tsk->active_mm, addr, fsr, regs);
+	do_bad_area(addr, fsr, regs);
 	return 0;
 }
 
@@ -364,8 +362,7 @@ do_translation_fault(unsigned long addr, unsigned int fsr,
 static int
 do_sect_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 {
-	struct task_struct *tsk = current;
-	do_bad_area(tsk, tsk->active_mm, addr, fsr, regs);
+	do_bad_area(addr, fsr, regs);
 	return 0;
 }
 

arch/arm/mm/fault.h

-void do_bad_area(struct task_struct *tsk, struct mm_struct *mm,
-		 unsigned long addr, unsigned int fsr, struct pt_regs *regs);
-
-void show_pte(struct mm_struct *mm, unsigned long addr);
+void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs);
 
 unsigned long search_exception_table(unsigned long addr);