[PATCH 0/10] use safer test on the result of find_first_zero_bit

[Geert Uytterhoeven]

Hi Julia,

On Wed, Jun 4, 2014 at 11:52 AM, Julia Lawall <julia.lawall at lip6.fr> wrote:
>> Maybe the documented return code should be changed to allow for the
>> existing behaviour.
>
> Sorry, I'm not sure to understand what you suggest here.

include/asm-generic/bitops/find.h:

| /**
|  * find_first_zero_bit - find the first cleared bit in a memory region
|  * @addr: The address to start the search at
|  * @size: The maximum number of bits to search
|  *
|  * Returns the bit number of the first cleared bit.
|  * If no bits are zero, returns @size.

"If no bits are zero, returns @size or a number larger than @size."

|  */
| extern unsigned long find_first_zero_bit(const unsigned long *addr,
|                                          unsigned long size);

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds