On Tue, 4 Jan 2011, Minchan Kim wrote:
> diff --git a/mm/page-writeback.c b/mm/page-writeback.c
> index fc93802..c340536 100644
> --- a/mm/page-writeback.c
> +++ b/mm/page-writeback.c
> @@ -390,9 +390,12 @@ void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty)
> {
> unsigned long background;
> unsigned long dirty;
> - unsigned long available_memory = determine_dirtyable_memory();
> + unsigned long available_memory;
You need unsigned long uninitialized_var(available_memory) to avoid the
warning.
> struct task_struct *tsk;
>
> + if (!vm_dirty_bytes || !dirty_background_bytes)
> + available_memory = determine_dirtyable_memory();
> +
> if (vm_dirty_bytes)
> dirty = DIV_ROUND_UP(vm_dirty_bytes, PAGE_SIZE);
> else
--
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