container_of: remove container_of_safe()

It came in from a staging driver that has been long removed from the
tree, and there are no in-kernel users of the macro, and it's very
dubious if anyone should ever use this thing, so just remove it
entirely.

Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221024123933.3331116-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/linux/container_of.h b/include/linux/container_of.h
index 2f4944b..a6f2421 100644 (file)
--- a/include/linux/container_of.h
+++ b/include/linux/container_of.h
@@ -21,20 +21,4 @@
                      "pointer type mismatch in container_of()");       \
        ((type *)(__mptr - offsetof(type, member))); })
 
-/**
- * container_of_safe - cast a member of a structure out to the containing structure
- * @ptr:       the pointer to the member.
- * @type:      the type of the container struct this is embedded in.
- * @member:    the name of the member within the struct.
- *
- * If IS_ERR_OR_NULL(ptr), ptr is returned unchanged.
- */
-#define container_of_safe(ptr, type, member) ({                                \
-       void *__mptr = (void *)(ptr);                                   \
-       static_assert(__same_type(*(ptr), ((type *)0)->member) ||       \
-                     __same_type(*(ptr), void),                        \
-                     "pointer type mismatch in container_of_safe()");  \
-       IS_ERR_OR_NULL(__mptr) ? ERR_CAST(__mptr) :                     \
-               ((type *)(__mptr - offsetof(type, member))); })
-
 #endif /* _LINUX_CONTAINER_OF_H */