[PATCH v2 3/5] uaccess.h: Use with() and and_with() in __scoped_user_access()

[david.laight.linux at gmail.com]

From: David Laight <david.laight.linux at gmail.com>

Wrappers for autoterminating nested for() loops have been added to
compiler.h, use them to hide the gory details.

Signed-off-by: David Laight <david.laight.linux at gmail.com>
---
 include/linux/uaccess.h | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 809e4f7dfdbd..64bc2492eb99 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -736,13 +736,10 @@ static __always_inline void __scoped_user_rw_access_end(const void *p)
  *
  * Don't use directly. Use scoped_masked_user_$MODE_access() instead.
  */
-#define __scoped_user_access(mode, uptr, size, elbl)				\
-for (bool done = false; !done; done = true)					\
-	for (auto _tmpptr = __scoped_user_access_begin(mode, uptr, size, elbl);	\
-	     !done; done = true)						\
-		/* Force modified pointer usage within the scope */		\
-		for (const auto uptr  __cleanup(__scoped_user_##mode##_access_end) = \
-		     _tmpptr; !done; done = true)
+#define __scoped_user_access(mode, uptr, size, elbl)					\
+	with (auto _tmpptr = __scoped_user_access_begin(mode, uptr, size, elbl))	\
+		/* Force modified pointer usage within the scope */			\
+		and_with (const auto uptr __cleanup(__scoped_user_##mode##_access_end) = _tmpptr)
 
 /**
  * scoped_user_read_access_size - Start a scoped user read access with given size
-- 
2.39.5