Re: [PATCH 2.5.63] Teach page_mapped about the anon flag

Dave McCracken
2003-03-03T21:52:42Z

--On Monday, March 03, 2003 13:35:39 -0800 Andrew Morton <akpm@digeo.com>
wrote:

> We do need a patch I think. page_mapped() is still assuming that an
> all-bits-zero atomic_t corresponds to a zero-value atomic_t.
>
> This does appear to be true for all supported architectures, but it's a
> bit grubby.

If that's ever not true then we need extra code to initialize/rezero that
field, since we assume it's zero on alloc, and the pte_chain code also
assumes it's zero for a new page.

Dave

======================================================================
Dave McCracken IBM Linux Base Kernel Team 1-512-838-3059
dmccr@us.ibm.com T/L 678-3059