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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2016-12-12 16:44:29 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-12 18:55:08 -0800
commit1dd38b6c27d59414e89c08dd1ae9677a8e12cbc4 (patch)
tree77d216598637e2365570434268ffff5bde987045 /include/asm-generic
parent763b218ddfaf56761c19923beb7e16656f66ec62 (diff)
downloadop-kernel-dev-1dd38b6c27d59414e89c08dd1ae9677a8e12cbc4.zip
op-kernel-dev-1dd38b6c27d59414e89c08dd1ae9677a8e12cbc4.tar.gz
mm: move vma_is_anonymous check within pmd_move_must_withdraw
Independent of whether the vma is for anonymous memory, some arches like ppc64 would like to override pmd_move_must_withdraw(). One option is to encapsulate the vma_is_anonymous() check for general architectures inside pmd_move_must_withdraw() so that is always called and architectures that need unconditional overriding can override this function. ppc64 needs to override the function when the MMU is configured to use hash PTE's. [bsingharora@gmail.com: reworked changelog] Link: http://lkml.kernel.org/r/20161113150025.17942-1-aneesh.kumar@linux.vnet.ibm.com Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michael Neuling <mikey@neuling.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/pgtable.h12
1 files changed, 0 insertions, 12 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 41b95d8..2065e81 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -652,18 +652,6 @@ static inline pmd_t pmd_read_atomic(pmd_t *pmdp)
}
#endif
-#ifndef pmd_move_must_withdraw
-static inline int pmd_move_must_withdraw(spinlock_t *new_pmd_ptl,
- spinlock_t *old_pmd_ptl)
-{
- /*
- * With split pmd lock we also need to move preallocated
- * PTE page table if new_pmd is on different PMD page table.
- */
- return new_pmd_ptl != old_pmd_ptl;
-}
-#endif
-
/*
* This function is meant to be used by sites walking pagetables with
* the mmap_sem hold in read mode to protect against MADV_DONTNEED and
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