On Thu, 04 Oct 2012 15:47:38 -0400 (EDT)
David Miller <da...@davemloft.net> wrote:
> The transparent huge page code passes a PMD pointer in as the third
> argument of update_mmu_cache(), which expects a PTE pointer.
>
> This never got noticed because X86 implements update_mmu_cache() as a
> macro and thus we don't get any type checking, and X86 is the only
> architecture which supports transparent huge pages currently.
>
> Before oter architectures can support transparent huge pages properly
> we need to add a new interface which will take a PMD pointer as the
> third argument rather than a PTE pointer.
I'll toss this on top:
---
a/arch/s390/include/asm/pgtable.h~mm-add-and-use-update_mmu_cache_pmd-in-transparent-huge-page-code-fix
+++ a/arch/s390/include/asm/pgtable.h
@@ -42,6 +42,7 @@ extern void fault_init(void);
* tables contain all the necessary information.
*/
#define update_mmu_cache(vma, address, ptep) do { } while (0)
+#define update_mmu_cache_pmd(vma, address, ptep) do { } while (0)
/*
* ZERO_PAGE is a global shared page that is always zero; used
_
and I trust that Gerald will be able to review test the result once all
this has landed, please.
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