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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2016-12-12 16:44:29 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-12 18:55:08 -0800 |
| commit | 1dd38b6c27d59414e89c08dd1ae9677a8e12cbc4 (patch) | |
| tree | 77d216598637e2365570434268ffff5bde987045 /include/asm-generic | |
| parent | 763b218ddfaf56761c19923beb7e16656f66ec62 (diff) | |
| download | lwn-1dd38b6c27d59414e89c08dd1ae9677a8e12cbc4.tar.gz lwn-1dd38b6c27d59414e89c08dd1ae9677a8e12cbc4.zip | |
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.h | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index 41b95d82a185..2065e81701fc 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 |