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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-17 12:00:22 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-17 12:00:22 -0700 |
| commit | bf32d52c455d933cc9a459bb94af9ea8b5850af9 (patch) | |
| tree | 0d6af119b141e46e120ad06c867fe82ac3c00f1c /mm/migrate.c | |
| parent | 0c375501be6e6dc23c11ebfa394434517444e62d (diff) | |
| parent | 7d132055814ef17a6c7b69f342244c410a5e000f (diff) | |
Merge 3.10-rc6 into tty-next
We want the changes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/migrate.c')
| -rw-r--r-- | mm/migrate.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index b1f57501de9..6f0c24438bb 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -200,15 +200,14 @@ static void remove_migration_ptes(struct page *old, struct page *new) * get to the page and wait until migration is finished. * When we return from this function the fault will be retried. */ -void migration_entry_wait(struct mm_struct *mm, pmd_t *pmd, - unsigned long address) +static void __migration_entry_wait(struct mm_struct *mm, pte_t *ptep, + spinlock_t *ptl) { - pte_t *ptep, pte; - spinlock_t *ptl; + pte_t pte; swp_entry_t entry; struct page *page; - ptep = pte_offset_map_lock(mm, pmd, address, &ptl); + spin_lock(ptl); pte = *ptep; if (!is_swap_pte(pte)) goto out; @@ -236,6 +235,20 @@ out: pte_unmap_unlock(ptep, ptl); } +void migration_entry_wait(struct mm_struct *mm, pmd_t *pmd, + unsigned long address) +{ + spinlock_t *ptl = pte_lockptr(mm, pmd); + pte_t *ptep = pte_offset_map(pmd, address); + __migration_entry_wait(mm, ptep, ptl); +} + +void migration_entry_wait_huge(struct mm_struct *mm, pte_t *pte) +{ + spinlock_t *ptl = &(mm)->page_table_lock; + __migration_entry_wait(mm, pte, ptl); +} + #ifdef CONFIG_BLOCK /* Returns true if all buffers are successfully locked */ static bool buffer_migrate_lock_buffers(struct buffer_head *head, |