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, 6 insertions, 18 deletions

diff --git a/include/asm-sparc64/uaccess.h b/include/asm-sparc64/uaccess.h
index 80a65d7e3db..203e8eee635 100644
--- a/include/asm-sparc64/uaccess.h
+++ b/include/asm-sparc64/uaccess.h
@@ -70,26 +70,14 @@ static inline int access_ok(int type, const void __user * addr, unsigned long si
  * with the main instruction path.  This means when everything is well,
  * we don't even have to jump over them.  Further, they do not intrude
  * on our cache or tlb entries.
- *
- * There is a special way how to put a range of potentially faulting
- * insns (like twenty ldd/std's with now intervening other instructions)
- * You specify address of first in insn and 0 in fixup and in the next
- * exception_table_entry you specify last potentially faulting insn + 1
- * and in fixup the routine which should handle the fault.
- * That fixup code will get
- * (faulting_insn_address - first_insn_in_the_range_address)/4
- * in %g2 (ie. index of the faulting instruction in the range).
  */
 
-struct exception_table_entry
-{
-        unsigned insn, fixup;
+struct exception_table_entry {
+        unsigned int insn, fixup;
 };
 
-/* Special exable search, which handles ranges.  Returns fixup */
-unsigned long search_extables_range(unsigned long addr, unsigned long *g2);
-
 extern void __ret_efault(void);
+extern void __retl_efault(void);
 
 /* Uh, these should become the main single-value transfer routines..
  * They automatically use the right size if we just have the right
@@ -263,7 +251,7 @@ copy_from_user(void *to, const void __user *from, unsigned long size)
 {
 	unsigned long ret = ___copy_from_user(to, from, size);
 
-	if (ret)
+	if (unlikely(ret))
 		ret = copy_from_user_fixup(to, from, size);
 	return ret;
 }
@@ -279,7 +267,7 @@ copy_to_user(void __user *to, const void *from, unsigned long size)
 {
 	unsigned long ret = ___copy_to_user(to, from, size);
 
-	if (ret)
+	if (unlikely(ret))
 		ret = copy_to_user_fixup(to, from, size);
 	return ret;
 }
@@ -295,7 +283,7 @@ copy_in_user(void __user *to, void __user *from, unsigned long size)
 {
 	unsigned long ret = ___copy_in_user(to, from, size);
 
-	if (ret)
+	if (unlikely(ret))
 		ret = copy_in_user_fixup(to, from, size);
 	return ret;
 }