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authorMichel Lespinasse <walken@google.com>2012-10-08 16:31:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-09 16:22:39 +0900
commit6b2dbba8b6ac4df26f72eda1e5ea7bab9f950e08 (patch)
tree422ed8d7ac2fe45069f20cfba84a9a097bf444af /mm/filemap_xip.c
parentfff3fd8a1210a165252cd7cd01206da7a90d3a06 (diff)
downloadlinux-6b2dbba8b6ac4df26f72eda1e5ea7bab9f950e08.tar.gz
mm: replace vma prio_tree with an interval tree
Implement an interval tree as a replacement for the VMA prio_tree. The algorithms are similar to lib/interval_tree.c; however that code can't be directly reused as the interval endpoints are not explicitly stored in the VMA. So instead, the common algorithm is moved into a template and the details (node type, how to get interval endpoints from the node, etc) are filled in using the C preprocessor. Once the interval tree functions are available, using them as a replacement to the VMA prio tree is a relatively simple, mechanical job. Signed-off-by: Michel Lespinasse <walken@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: Hillf Danton <dhillf@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/filemap_xip.c')
-rw-r--r--mm/filemap_xip.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index 91750227a19..a52daee11d3 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -167,7 +167,6 @@ __xip_unmap (struct address_space * mapping,
{
struct vm_area_struct *vma;
struct mm_struct *mm;
- struct prio_tree_iter iter;
unsigned long address;
pte_t *pte;
pte_t pteval;
@@ -184,7 +183,7 @@ __xip_unmap (struct address_space * mapping,
retry:
mutex_lock(&mapping->i_mmap_mutex);
- vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
+ vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) {
mm = vma->vm_mm;
address = vma->vm_start +
((pgoff - vma->vm_pgoff) << PAGE_SHIFT);