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[PATCH] ppc64: Fix the lazy icache/dcache code for non-RAM pages

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For some stupid reason I can't explain (brown paper bag is at hand), I
removed the check pfn_valid() in the code that does the icache/dcache
coherency on POWER4 and later. That causes us to eventually try to
access non existing struct page when hashing in IO pages.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt
2005-11-08 11:21:05 +11:00
committed by Paul Mackerras
parent b354cab076
commit 76c8e25b90
1 changed files with 3 additions and 0 deletions
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3
arch/powerpc/mm/hash_utils_64.c
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@@ -507,6 +507,9 @@ unsigned int hash_page_do_lazy_icache(unsigned int pp, pte_t pte, int trap)
{ {
struct page *page; struct page *page;
if (!pfn_valid(pte_pfn(pte)))
return pp;
page = pte_page(pte); page = pte_page(pte);
/* page is dirty */ /* page is dirty */