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SubjectRE: [patch -mm series] ia64 specific /dev/mem handlers
>On Tue, Feb 22, 2005 at 09:41:04AM -0500, Jes Sorensen wrote:
>> >> + if (page->flags & PG_uncached)
>> Andrew> dude. That ain't gonna work ;)
>> Pardon my lack of clue, but why not?
>I think you're supposed to always use test_bit() to check page flags

You defined PG_uncached as "20" ... so either:

if (page->flags & (1<<PG_uncached))
or (much better) to use:

test_bit(PG_uncached, &page->flags).

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