On Wed, Jan 28, 2009 at 04:14:39AM +0100, Oleg Nesterov wrote:
> I didn't send the actual patch. The idea is,
>
> can't we use O_LOCK_FLAGS bit? I agree, it is a bit ugly,
> and I won't insist if you don't like is.
>
> static inline int try_lock_f_flags(struct file *file)
> {
> return !test_and_set_bit(O_LOCK_FLAGS, file->f_flags);
> }
->f_flags is an unsigned int and the bit macros need an unsigned long.
Increasing the size of struct file for this is probably a bad idea.
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