On Wed, Jul 11, 2001 at 12:03:11AM +1000, Andrew Morton wrote:
> Linus included the test for non-null page->mapping
> as well. I wonder why.
I think it is because if you try hard you can map a dma page via
/dev/mem and then the driver can release the dma page (at rmmod for
example) before you munmap /dev/mem, and then the page goes in the
freelist and it is allocated as pagecache.
Andrea
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This archive was generated by hypermail 2b29 : Sun Jul 15 2001 - 21:00:11 EST