114 #define ptr_mask_bits(ptr, n) ({					\  argument
115 	unsigned long __v = (unsigned long)(ptr);			\
116 	(typeof(ptr))(__v & -BIT(n));					\
119 #define ptr_unmask_bits(ptr, n) ((unsigned long)(ptr) & (BIT(n) - 1))  argument
121 #define ptr_unpack_bits(ptr, bits, n) ({				\  argument
122 	unsigned long __v = (unsigned long)(ptr);			\
124 	(typeof(ptr))(__v & -BIT(n));					\
127 #define ptr_pack_bits(ptr, bits, n) ({					\  argument
130 	((typeof(ptr))((unsigned long)(ptr) | __bits));			\
133 #define ptr_dec(ptr) ({							\  argument
134 	unsigned long __v = (unsigned long)(ptr);			\
135 	(typeof(ptr))(__v - 1);						\
138 #define ptr_inc(ptr) ({							\  argument
139 	unsigned long __v = (unsigned long)(ptr);			\
140 	(typeof(ptr))(__v + 1);						\
143 #define page_mask_bits(ptr) ptr_mask_bits(ptr, PAGE_SHIFT)  argument
144 #define page_unmask_bits(ptr) ptr_unmask_bits(ptr, PAGE_SHIFT)  argument
145 #define page_pack_bits(ptr, bits) ptr_pack_bits(ptr, bits, PAGE_SHIFT)  argument
146 #define page_unpack_bits(ptr, bits) ptr_unpack_bits(ptr, bits, PAGE_SHIFT)  argument
150 #define fetch_and_zero(ptr) ({						\  argument
151 	typeof(*ptr) __T = *(ptr);					\
152 	*(ptr) = (typeof(*ptr))0;					\
167 #define container_of_user(ptr, type, member) ({				\  argument
168 	void __user *__mptr = (void __user *)(ptr);			\
169 	BUILD_BUG_ON_MSG(!__same_type(*(ptr), struct_member(type, member)) && \
170 			 !__same_type(*(ptr), void),			\