powerpc/mm: Simplify returns from __do_page_fault

Now that we moved the exception state handling to a wrapper, we can
just directly return rather than "goto bail"

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 2f825ae68f2054b902ec6e7426bee89f7cbaa8b7..e8d6acc888c5006c994d6eeca47349c0bfe3be1f 100644 (file)
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -233,39 +233,36 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
        if (error_code & ICSWX_DSI_UCT) {
                rc = acop_handle_fault(regs, address, error_code);
                if (rc)
-                       goto bail;
+                       return rc;
        }
 #endif /* CONFIG_PPC_ICSWX */
 
        if (notify_page_fault(regs))
-               goto bail;
+               return 0;
 
        if (unlikely(page_fault_is_bad(error_code))) {
-               if (is_user)
+               if (is_user) {
                        _exception(SIGBUS, regs, BUS_OBJERR, address);
-               else
-                       rc = SIGBUS;
-               goto bail;
+                       return 0;
+               }
+               return SIGBUS;
        }
 
        /*
         * The kernel should never take an execute fault nor should it
         * take a page fault to a kernel address.
         */
-       if (!is_user && (is_exec || (address >= TASK_SIZE))) {
-               rc = SIGSEGV;
-               goto bail;
-       }
+       if (!is_user && (is_exec || (address >= TASK_SIZE)))
+               return SIGSEGV;
 
        /* We restore the interrupt state now */
        if (!arch_irq_disabled_regs(regs))
                local_irq_enable();
 
        if (faulthandler_disabled() || mm == NULL) {
-               if (!is_user) {
-                       rc = SIGSEGV;
-                       goto bail;
-               }
+               if (!is_user)
+                       return SIGSEGV;
+
                /* faulthandler_disabled() in user mode is really bad,
                   as is current->mm == NULL. */
                printk(KERN_EMERG "Page fault in user mode with "
@@ -454,9 +451,8 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
                        goto bad_area_nosemaphore;
                rc = mm_fault_error(regs, address, fault);
                if (rc >= MM_FAULT_RETURN)
-                       goto bail;
-               else
-                       rc = 0;
+                       return rc;
+               rc = 0;
        }
 
        /*
@@ -483,7 +479,7 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
                              regs, address);
        }
 
-       goto bail;
+       return rc;
 
 bad_area:
        up_read(&mm->mmap_sem);
@@ -492,7 +488,7 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
        /* User mode accesses cause a SIGSEGV */
        if (is_user) {
                _exception(SIGSEGV, regs, code, address);
-               goto bail;
+               return 0;
        }
 
        if (is_exec && (error_code & DSISR_PROTFAULT))
@@ -500,10 +496,7 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
                                   " page (%lx) - exploit attempt? (uid: %d)\n",
                                   address, from_kuid(&init_user_ns, current_uid()));
 
-       rc = SIGSEGV;
-
-bail:
-       return rc;
+       return SIGSEGV;
 }
 NOKPROBE_SYMBOL(__do_page_fault);