>>  I learnt recently that Linux at least as %p in its printk() routine
>>to print pointers. (%08x when sizeof(void*)=32, %016qx when
>>sizeof(void*)=64).
>>  I don't know how widespread this is.
>HPUX and SGI support %p for correctly sized pointers.
>I'm pretty sure (it's been a while) that AiX and Motorolo's old SVR4 did
>also.

	Just to be sure...
	I do not cast pointer to u_long on printing (I agree %p would be
	better).  Type cast is necessary when, for example, you would like to
	handle pointer as plain number like:
		if (1 & (u_long)p)
			printf("odd address\n");
		else
			printf("even address\n");

itojun