Update from upstream with manual merge of Yasunori Goto's

changes to swiotlb.c made in commit 281dd25cdc0d6903929b79183816d151ea626341
since this file has been moved from arch/ia64/lib/swiotlb.c to
lib/swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 4554c961251c..f6de76e0a45d 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -504,7 +504,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
 
                 bad_access:
                 spin_unlock(&mm->page_table_lock);
-                /* simulate a read access fault */
+                /* simulate a write access fault */
                 do_DataAbort(addr, 15 + (1 << 11), regs);
                 return -1;
         }
@@ -624,6 +624,9 @@ void __attribute__((noreturn)) __bug(const char *file, int line, void *data)
                 printk(" - extra data = %p", data);
         printk("\n");
         *(int *)0 = 0;
+
+        /* Avoid "noreturn function does return" */
+        for (;;);
 }
 EXPORT_SYMBOL(__bug);