Commit 76c8e25b authored Nov 08, 2005 by Benjamin Herrenschmidt Committed by Paul Mackerras Nov 08, 2005

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

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>

parent b354cab0

arch/powerpc/mm/hash_utils_64.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -507,6 +507,9 @@ unsigned int hash_page_do_lazy_icache(unsigned int pp, pte_t pte, int trap)
		{
		struct page *page;

		if (!pfn_valid(pte_pfn(pte)))
		return pp;

		page = pte_page(pte);

		/* page is dirty */