diff options
| author | Andrew Morton <akpm@osdl.org> | 2004-05-14 05:43:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2004-05-14 05:43:07 -0700 |
| commit | e059d5daf158b1bde61883ee5a091cd4875864a9 (patch) | |
| tree | b81340cab05c5405a489115bd442856fdaad7e28 /include/linux | |
| parent | 485ba3c3b6da6ca02daee0f961fe70beaebd32b3 (diff) | |
[PATCH] Add blk_run_page()
From: Andrea Arcangeli <andrea@suse.de>
From: Jens Axboe
Add blk_run_page() API. This is so that we can pass the target page all the
way down to (for example) the swap unplug function. So swap can work out
which blockdevs back this particular page.
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/backing-dev.h | 4 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 17 |
2 files changed, 16 insertions, 5 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 00371734995c..3c369c6553e3 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -28,12 +28,12 @@ struct backing_dev_info { int memory_backed; /* Cannot clean pages with writepage */ congested_fn *congested_fn; /* Function pointer if device is md/dm */ void *congested_data; /* Pointer to aux data for congested func */ - void (*unplug_io_fn)(struct backing_dev_info *); + void (*unplug_io_fn)(struct backing_dev_info *, struct page *); void *unplug_io_data; }; extern struct backing_dev_info default_backing_dev_info; -void default_unplug_io_fn(struct backing_dev_info *bdi); +void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page); int writeback_acquire(struct backing_dev_info *bdi); int writeback_in_progress(struct backing_dev_info *bdi); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index e38d901a6526..03018e2f974a 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -532,16 +532,27 @@ static inline request_queue_t *bdev_get_queue(struct block_device *bdev) return bdev->bd_disk->queue; } -static inline void blk_run_backing_dev(struct backing_dev_info *bdi) +static inline void blk_run_backing_dev(struct backing_dev_info *bdi, + struct page *page) { if (bdi && bdi->unplug_io_fn) - bdi->unplug_io_fn(bdi); + bdi->unplug_io_fn(bdi, page); } static inline void blk_run_address_space(struct address_space *mapping) { if (mapping) - blk_run_backing_dev(mapping->backing_dev_info); + blk_run_backing_dev(mapping->backing_dev_info, NULL); +} + +static inline void blk_run_page(struct page *page) +{ + struct address_space *mapping; + + smp_mb(); + mapping = page->mapping; + if (mapping) + blk_run_backing_dev(mapping->backing_dev_info, page); } /* |