__kernel_key_t 23 include/linux/types.h typedef __kernel_key_t key_t; __kernel_key_t 20 include/uapi/asm-generic/ipcbuf.h __kernel_key_t key; __kernel_key_t 6 include/uapi/linux/ipc.h #define IPC_PRIVATE ((__kernel_key_t) 0) __kernel_key_t 11 include/uapi/linux/ipc.h __kernel_key_t key;