On Tue, Aug 02, 2011 at 09:27:38PM +0200, Julia Lawall wrote:
> From: Julia Lawall <julia@xxxxxxx>
>
> Allow the function to return 0 when 0 elements are asked for rather than
> crashing the kernel with BUG.
>
> Signed-off-by: Julia Lawall <julia@xxxxxxx>
Reviewed-by: Andrea Righi <andrea@xxxxxxxxxxxxxxx>
Thanks,
-Andrea
>
> ---
> var/julia/linuxcopy/kernel/kfifo.c | 6 ------
> 1 file changed, 6 deletions(-)
>
> diff -u -p a/kernel/kfifo.c b/kernel/kfifo.c
> index 01a0700..9f928ef 100644
> --- a/var/linuxes/linux-next/kernel/kfifo.c
> +++ b/var/julia/linuxcopy/kernel/kfifo.c
> @@ -562,9 +562,6 @@ EXPORT_SYMBOL(__kfifo_to_user_r);
> unsigned int __kfifo_dma_in_prepare_r(struct __kfifo *fifo,
> struct scatterlist *sgl, int nents, unsigned int len, size_t recsize)
> {
> - if (!nents)
> - BUG();
> -
> len = __kfifo_max_r(len, recsize);
>
> if (len + recsize > kfifo_unused(fifo))
> @@ -586,9 +583,6 @@ EXPORT_SYMBOL(__kfifo_dma_in_finish_r);
> unsigned int __kfifo_dma_out_prepare_r(struct __kfifo *fifo,
> struct scatterlist *sgl, int nents, unsigned int len, size_t recsize)
> {
> - if (!nents)
> - BUG();
> -
> len = __kfifo_max_r(len, recsize);
>
> if (len + recsize > fifo->in - fifo->out)
--
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