tools/kvm/include/linux/kernel.h

   1
   2 #ifndef KVM__LINUX_KERNEL_H_
   3 #define KVM__LINUX_KERNEL_H_
   4
   5 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
   6
   7 #define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
   8 #define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
   9
  10 #ifndef offsetof
  11 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
  12 #endif
  13
  14 #ifndef container_of
  15 /**
  16  * container_of - cast a member of a structure out to the containing structure
  17  * @ptr:        the pointer to the member.
  18  * @type:       the type of the container struct this is embedded in.
  19  * @member:     the name of the member within the struct.
  20  *
  21  */
  22 #define container_of(ptr, type, member) ({                      \
  23         const typeof(((type *)0)->member) * __mptr = (ptr);     \
  24         (type *)((char *)__mptr - offsetof(type, member)); })
  25 #endif
  26
  27 #define min(x, y) ({                            \
  28         typeof(x) _min1 = (x);                  \
  29         typeof(y) _min2 = (y);                  \
  30         (void) (&_min1 == &_min2);              \
  31         _min1 < _min2 ? _min1 : _min2; })
  32
  33 #define max(x, y) ({                            \
  34         typeof(x) _max1 = (x);                  \
  35         typeof(y) _max2 = (y);                  \
  36         (void) (&_max1 == &_max2);              \
  37         _max1 > _max2 ? _max1 : _max2; })
  38
  39 #endif