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| author | Mel Gorman <mgorman@suse.de> | 2012-07-31 16:44:57 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-31 18:42:47 -0700 |
| commit | a509bc1a9e487d952d9404318f7f990166ab57a7 (patch) | |
| tree | 40a8f8a20877da8a5b855cfbc3813c0874605093 /include | |
| parent | 62c230bc1790923a1b35da03596a68a6c9b5b100 (diff) | |
| download | linux-a509bc1a9e487d952d9404318f7f990166ab57a7.tar.gz linux-a509bc1a9e487d952d9404318f7f990166ab57a7.tar.bz2 linux-a509bc1a9e487d952d9404318f7f990166ab57a7.zip | |
mm: swap: implement generic handler for swap_activate
The version of swap_activate introduced is sufficient for swap-over-NFS
but would not provide enough information to implement a generic handler.
This patch shuffles things slightly to ensure the same information is
available for aops->swap_activate() as is available to the core.
No functionality change.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric B Munson <emunson@mgebm.net>
Cc: Eric Paris <eparis@redhat.com>
Cc: James Morris <jmorris@namei.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Cc: Neil Brown <neilb@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Xiaotian Feng <dfeng@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fs.h | 6 | ||||
| -rw-r--r-- | include/linux/swap.h | 5 |
2 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 38356ab827c9..c8667f8b5358 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -429,6 +429,7 @@ struct kstatfs; struct vm_area_struct; struct vfsmount; struct cred; +struct swap_info_struct; extern void __init inode_init(void); extern void __init inode_init_early(void); @@ -640,8 +641,9 @@ struct address_space_operations { int (*error_remove_page)(struct address_space *, struct page *); /* swapfile support */ - int (*swap_activate)(struct file *file); - int (*swap_deactivate)(struct file *file); + int (*swap_activate)(struct swap_info_struct *sis, struct file *file, + sector_t *span); + void (*swap_deactivate)(struct file *file); }; extern const struct address_space_operations empty_aops; diff --git a/include/linux/swap.h b/include/linux/swap.h index ab230b1ebf61..388e70601413 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -324,6 +324,11 @@ extern int swap_writepage(struct page *page, struct writeback_control *wbc); extern int swap_set_page_dirty(struct page *page); extern void end_swap_bio_read(struct bio *bio, int err); +int add_swap_extent(struct swap_info_struct *sis, unsigned long start_page, + unsigned long nr_pages, sector_t start_block); +int generic_swapfile_activate(struct swap_info_struct *, struct file *, + sector_t *); + /* linux/mm/swap_state.c */ extern struct address_space swapper_space; #define total_swapcache_pages swapper_space.nrpages |