privmask
privmask(p)
~privmask(p)
privmask(p)) != 0)
#define __PRIV_ASSERT(a, b) ((a)->pbits[privword(b)] |= privmask(b))
#define __PRIV_CLEAR(a, b) ((a)->pbits[privword(b)] &= ~privmask(b))
#define __PRIV_ISASSERT(a, b) ((a)->pbits[privword(b)] & privmask(b))