From: Niklas Cassel > find_first_zero_bit()'s parameter 'size' is defined in bits, > not in bytes. > > Calling find_first_zero_bit() with the wrong size unit > will lead to insidious bugs. > > Fix all uses of find_first_zero_bit() called with > sizeof() as size argument in drivers/pci. ... Isn't all this code just using the wrong function. Shouldn't they be using ffz() (or whatever it is called) to find the first zero in a numeric argument rather that find_first_zero_bit() which is intended for large bitmaps. Perhaps the type for 'large bitmaps' should be: struct { unsigned long bitmap_bits[0]; } bitmap; rather than unsigned long[]. David