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vm_area_operations: kill ->migrate()

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the only instance this method has ever grown was one in kernfs -
one that call ->migrate() of another vm_ops if it exists.

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2014-05-15 05:06:42 -04:00
commit 50062175ff
5 changed files with 0 additions and 60 deletions
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21
mm/migrate.c
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@ -1536,27 +1536,6 @@ out:
return err;
}
/*
* Call migration functions in the vma_ops that may prepare
* memory in a vm for migration. migration functions may perform
* the migration for vmas that do not have an underlying page struct.
*/
int migrate_vmas(struct mm_struct *mm, const nodemask_t *to,
const nodemask_t *from, unsigned long flags)
{
struct vm_area_struct *vma;
int err = 0;
for (vma = mm->mmap; vma && !err; vma = vma->vm_next) {
if (vma->vm_ops && vma->vm_ops->migrate) {
err = vma->vm_ops->migrate(vma, to, from, flags);
if (err)
break;
}
}
return err;
}
#ifdef CONFIG_NUMA_BALANCING
/*
* Returns true if this is a safe migration target node for misplaced NUMA