Re: Update of file offset on write() etc. is non-atomic with I/O

[Linus Torvalds]

On Mon, Mar 3, 2014 at 4:23 PM, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
>
> I wonder if something like
>
> static inline struct fd fdget(int fd)
> {
>         unsigned long v = __fdget(fd);
>         return (struct fd){(struct file *)(v & ~1), v & 1};
> }

Make it use "&3" so that we have the two bits we need, and I'll
happily take that approach, yes.

                    Linus
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