Alan Stern <[email protected]> wrote: > + * Returns: 1 if @lock is locked, 0 otherwise. > + * However, on !CONFIG_SMP builds with !CONFIG_DEBUG_SPINLOCK, > + * the return value is always 0 (see include/linux/spinlock_up.h). > + * Therefore you should not rely heavily on the return value.
Seems reasonable. It might also want to include a note that the lock isn't necessarily held by your own CPU. I would also use "=n" rather than "!", so maybe something like: * Returns: 1 if @lock is locked, 0 otherwise. * * Note that the function only tells you that the CPU is seen to be locked, * not that it is locked on your CPU. * * Further, on CONFIG_SMP=n builds with CONFIG_DEBUG_SPINLOCK=n, the return * value is always 0 (see include/linux/spinlock_up.h). Therefore you should * not rely heavily on the return value. David
