Messages in this thread Patch in this message | | | Date | Thu, 18 Oct 2012 18:26:42 +0200 | From | Gerald Schaefer <> | Subject | Re: linux-next: build failure after merge of the final tree (tip/s390 trees related) |
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On Thu, 18 Oct 2012 17:22:01 +1100 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> Hi all, > > After merging the final tree, today's linux-next build (s390 allyesconfig) > failed like this: > > mm/huge_memory.c:1424:2: error: implicit declaration of function 'pmd_pgprot' [-Werror=implicit-function-declaration] > mm/huge_memory.c:1424:7: error: incompatible types when assigning to type 'pgprot_t' from type 'int' > > (see http://kisskb.ellerman.id.au/kisskb/buildresult/7383823/) > > Caused by commit 35d3d3427314 ("s390/thp: select > HAVE_ARCH_TRANSPARENT_HUGEPAGE") from the s390 tree interacting with > commit 93c9d633bd9e ("mm/thp: Preserve pgprot across huge page split") > from the tip tree. > > N.B. Mips also selects HAVE_ARCH_TRANSPARENT_HUGEPAGE as of commit > e21a828a1bba ("MIPS: Transparent Huge Pages support") from the mips tree > and so will be broken in some configs now as well. > > Anyone have suggested merge fix patches I can apply?
Subject: [PATCH] s390/thp: implement pmd_pgprot() for s390
git commit "mm/thp: Preserve pgprot across huge page split" in linux-next introduced a pmd_pgprot() function, which is missing on s390, resulting in a compile error when transparent huge pages are enabled. This patch adds an implementation of pmd_pgprot() for s390.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> --- arch/s390/include/asm/pgtable.h | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index f8887ab..2846920 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1250,6 +1250,19 @@ static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, *pmdp = entry; } +static inline pgprot_t pmd_pgprot(pmd_t pmd) +{ + pgprot_t prot = PAGE_RW; + + if (pmd_val(pmd) & _SEGMENT_ENTRY_RO) { + if (pmd_val(pmd) & _SEGMENT_ENTRY_INV) + prot = PAGE_NONE; + else + prot = PAGE_RO; + } + return prot; +} + static inline unsigned long massage_pgprot_pmd(pgprot_t pgprot) { unsigned long pgprot_pmd = 0; -- 1.7.11.7
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