mm/balloon_compaction: remove balloon mapping and flag AS_BALLOON_MAP
Now ballooned pages are detected using PageBalloon(). Fake mapping is no
longer required. This patch links ballooned pages to balloon device using
field page->private instead of page->mapping. Also this patch embeds
balloon_dev_info directly into struct virtio_balloon.
Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
Cc: Rafael Aquini <aquini@redhat.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 19191d3..7ea069c 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -24,8 +24,7 @@
AS_ENOSPC = __GFP_BITS_SHIFT + 1, /* ENOSPC on async write */
AS_MM_ALL_LOCKS = __GFP_BITS_SHIFT + 2, /* under mm_take_all_locks() */
AS_UNEVICTABLE = __GFP_BITS_SHIFT + 3, /* e.g., ramdisk, SHM_LOCK */
- AS_BALLOON_MAP = __GFP_BITS_SHIFT + 4, /* balloon page special map */
- AS_EXITING = __GFP_BITS_SHIFT + 5, /* final truncate in progress */
+ AS_EXITING = __GFP_BITS_SHIFT + 4, /* final truncate in progress */
};
static inline void mapping_set_error(struct address_space *mapping, int error)
@@ -55,21 +54,6 @@
return !!mapping;
}
-static inline void mapping_set_balloon(struct address_space *mapping)
-{
- set_bit(AS_BALLOON_MAP, &mapping->flags);
-}
-
-static inline void mapping_clear_balloon(struct address_space *mapping)
-{
- clear_bit(AS_BALLOON_MAP, &mapping->flags);
-}
-
-static inline int mapping_balloon(struct address_space *mapping)
-{
- return mapping && test_bit(AS_BALLOON_MAP, &mapping->flags);
-}
-
static inline void mapping_set_exiting(struct address_space *mapping)
{
set_bit(AS_EXITING, &mapping->flags);