diff options
| author | Gerald Schaefer | 2012-10-09 01:30:09 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2012-10-09 09:22:29 +0200 |
| commit | 46dcde735c9d8953bbd8d105ca6779e5b5300c28 (patch) | |
| tree | 48298fd35d0ef0091541bad482f06202aba97ad3 /mm/huge_memory.c | |
| parent | thp: remove assumptions on pgtable_t type (diff) | |
| download | kernel-qcow2-linux-46dcde735c9d8953bbd8d105ca6779e5b5300c28.tar.gz kernel-qcow2-linux-46dcde735c9d8953bbd8d105ca6779e5b5300c28.tar.xz kernel-qcow2-linux-46dcde735c9d8953bbd8d105ca6779e5b5300c28.zip | |
thp: introduce pmdp_invalidate()
On s390, a valid page table entry must not be changed while it is attached
to any CPU. So instead of pmd_mknotpresent() and set_pmd_at(), an IDTE
operation would be necessary there. This patch introduces the
pmdp_invalidate() function, to allow architecture-specific
implementations.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 9ea6d1953765..bec6243b6965 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1361,8 +1361,7 @@ static int __split_huge_page_map(struct page *page, * SMP TLB and finally we write the non-huge version * of the pmd entry with pmd_populate. */ - set_pmd_at(mm, address, pmd, pmd_mknotpresent(*pmd)); - flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE); + pmdp_invalidate(vma, address, pmd); pmd_populate(mm, pmd, pgtable); ret = 1; } |