The patch titled
Subject: mm/rmap: calculate page offset when needed
has been removed from the -mm tree. Its filename was
mm-rmap-calculate-page-offset-when-needed.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Subject: mm/rmap: calculate page offset when needed
Call page_to_pgoff() to get the page offset once we are sure we actually
need it, and any very obvious initial function checks have passed.
Trivial micro-optimization, and potentially save some cycles.
Signed-off-by: Davidlohr Bueso <dbueso@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/rmap.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff -puN mm/rmap.c~mm-rmap-calculate-page-offset-when-needed mm/rmap.c
--- a/mm/rmap.c~mm-rmap-calculate-page-offset-when-needed
+++ a/mm/rmap.c
@@ -1635,7 +1635,7 @@ static struct anon_vma *rmap_walk_anon_l
static int rmap_walk_anon(struct page *page, struct rmap_walk_control *rwc)
{
struct anon_vma *anon_vma;
- pgoff_t pgoff = page_to_pgoff(page);
+ pgoff_t pgoff;
struct anon_vma_chain *avc;
int ret = SWAP_AGAIN;
@@ -1643,6 +1643,7 @@ static int rmap_walk_anon(struct page *p
if (!anon_vma)
return ret;
+ pgoff = page_to_pgoff(page);
anon_vma_interval_tree_foreach(avc, &anon_vma->rb_root, pgoff, pgoff) {
struct vm_area_struct *vma = avc->vma;
unsigned long address = vma_address(page, vma);
@@ -1676,7 +1677,7 @@ static int rmap_walk_anon(struct page *p
static int rmap_walk_file(struct page *page, struct rmap_walk_control *rwc)
{
struct address_space *mapping = page->mapping;
- pgoff_t pgoff = page_to_pgoff(page);
+ pgoff_t pgoff;
struct vm_area_struct *vma;
int ret = SWAP_AGAIN;
@@ -1691,6 +1692,7 @@ static int rmap_walk_file(struct page *p
if (!mapping)
return ret;
+ pgoff = page_to_pgoff(page);
i_mmap_lock_read(mapping);
vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) {
unsigned long address = vma_address(page, vma);
_
Patches currently in -mm which might be from dave@xxxxxxxxxxxx are
origin.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
