On 2012-09-28 22:54, Paul Bolle wrote:

On Fri, 2012-09-28 at 11:43 +0800, Zhenzhong Duan wrote:

quoted

On 2012-09-27 19:35, Paul Bolle wrote:

quoted

I think setting pages_to_unuse to zero here is not needed. It is
initiated to zero in frontswap_shrink() and hasn't been touched since.
See my patch at https://lkml.org/lkml/2012/9/27/250.

Yes, it's unneeded. But I didn't see warning as you said in above link
when run 'make V=1 mm/frontswap.o'.

Not even before applying your patch? Anyhow, after applying your patch
the warnings gone here too.

I tested both cases, no warning, also didn't see -Wmaybe-uninitialized 
when make.
My env is el5. gcc version 4.1.2 20080704 (Red Hat 4.1.2-52)
Maybe your gcc built in/implicit spec use that option?
thanks
zduan

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