svn commit: r335432 - stable/11/sys/compat/linuxkpi/common/include/asm

[Hans Petter Selasky]

Author: hselasky
Date: Wed Jun 20 06:57:14 2018
New Revision: 335432
URL: https://svnweb.freebsd.org/changeset/base/335432

Log:
  MFC r334953:
  Implement the user_access_begin(), user_access_end(), usafe_get_user() and
  unsafe_put_user() function macros in the LinuxKPI.
  
  Submitted by:	Johannes Lundberg <johalun0 at gmail.com>
  Sponsored by:	Mellanox Technologies
  Sponsored by:	Limelight Networks

Modified:
  stable/11/sys/compat/linuxkpi/common/include/asm/uaccess.h
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/compat/linuxkpi/common/include/asm/uaccess.h
==============================================================================
--- stable/11/sys/compat/linuxkpi/common/include/asm/uaccess.h	Wed Jun 20 06:56:18 2018	(r335431)
+++ stable/11/sys/compat/linuxkpi/common/include/asm/uaccess.h	Wed Jun 20 06:57:14 2018	(r335432)
@@ -52,4 +52,17 @@ copy_from_user(void *to, const void *from, unsigned lo
 #define	__copy_from_user(...)	copy_from_user(__VA_ARGS__)
 #define	__copy_in_user(...)	copy_from_user(__VA_ARGS__)
 
+#define	user_access_begin() do { } while (0)
+#define	user_access_end() do { } while (0)
+
+#define	unsafe_get_user(x, ptr, err) do { \
+	if (unlikely(__get_user(x, ptr))) \
+		goto err; \
+} while (0)
+
+#define	unsafe_put_user(x, ptr, err) do { \
+	if (unlikely(__put_user(x, ptr))) \
+		goto err; \
+} while (0)
+
 #endif	/* _ASM_UACCESS_H_ */