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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2005-11-08 11:21:05 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2005-11-08 13:07:50 +1100 |
| commit | 76c8e25b905f99be5ddbe999597ba7c2c33ec64b (patch) | |
| tree | c6d13a7064534116ef1c8c22021d8949d32393cc /arch | |
| parent | b354cab0763080df3735dcd0c64a545f266cc9e2 (diff) | |
| download | talos-op-linux-76c8e25b905f99be5ddbe999597ba7c2c33ec64b.tar.gz talos-op-linux-76c8e25b905f99be5ddbe999597ba7c2c33ec64b.zip | |
[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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 3d83c3b84f0e..22e474876133 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -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 */ |
