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author | David Sterba <dsterba@suse.cz> | 2011-05-05 10:44:41 (GMT) |
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committer | David Sterba <dsterba@suse.cz> | 2011-05-06 10:34:03 (GMT) |
commit | f2a97a9dbd86eb1ef956bdf20e05c507b32beb96 (patch) | |
tree | 756c2db8fee9c02df0e3217ea208a82b5f1d5e78 /fs/btrfs/extent_io.c | |
parent | 621496f4fd56195b7b273521f467c2945165481f (diff) | |
download | linux-fsl-qoriq-f2a97a9dbd86eb1ef956bdf20e05c507b32beb96.tar.xz |
btrfs: remove all unused functions
Remove static and global declarations and/or definitions. Reduces size
of btrfs.ko by ~3.4kB.
text data bss dec hex filename
402081 7464 200 409745 64091 btrfs.ko.base
398620 7144 200 405964 631cc btrfs.ko.remove-all
Signed-off-by: David Sterba <dsterba@suse.cz>
Diffstat (limited to 'fs/btrfs/extent_io.c')
-rw-r--r-- | fs/btrfs/extent_io.c | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 9369289..9120829 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -941,13 +941,6 @@ int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, NULL, mask); } -static int clear_extent_new(struct extent_io_tree *tree, u64 start, u64 end, - gfp_t mask) -{ - return clear_extent_bit(tree, start, end, EXTENT_NEW, 0, 0, - NULL, mask); -} - int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached_state, gfp_t mask) { @@ -963,11 +956,6 @@ static int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, cached_state, mask); } -int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end) -{ - return wait_extent_bit(tree, start, end, EXTENT_WRITEBACK); -} - /* * either insert or lock state struct between start and end use mask to tell * us if waiting is desired. @@ -1028,25 +1016,6 @@ int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask) } /* - * helper function to set pages and extents in the tree dirty - */ -int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end) -{ - unsigned long index = start >> PAGE_CACHE_SHIFT; - unsigned long end_index = end >> PAGE_CACHE_SHIFT; - struct page *page; - - while (index <= end_index) { - page = find_get_page(tree->mapping, index); - BUG_ON(!page); - __set_page_dirty_nobuffers(page); - page_cache_release(page); - index++; - } - return 0; -} - -/* * helper function to set both pages and extents in the tree writeback */ static int set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end) @@ -1819,46 +1788,6 @@ static void end_bio_extent_readpage(struct bio *bio, int err) bio_put(bio); } -/* - * IO done from prepare_write is pretty simple, we just unlock - * the structs in the extent tree when done, and set the uptodate bits - * as appropriate. - */ -static void end_bio_extent_preparewrite(struct bio *bio, int err) -{ - const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); - struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; - struct extent_io_tree *tree; - u64 start; - u64 end; - - do { - struct page *page = bvec->bv_page; - struct extent_state *cached = NULL; - tree = &BTRFS_I(page->mapping->host)->io_tree; - - start = ((u64)page->index << PAGE_CACHE_SHIFT) + - bvec->bv_offset; - end = start + bvec->bv_len - 1; - - if (--bvec >= bio->bi_io_vec) - prefetchw(&bvec->bv_page->flags); - - if (uptodate) { - set_extent_uptodate(tree, start, end, &cached, - GFP_ATOMIC); - } else { - ClearPageUptodate(page); - SetPageError(page); - } - - unlock_extent_cached(tree, start, end, &cached, GFP_ATOMIC); - - } while (bvec >= bio->bi_io_vec); - - bio_put(bio); -} - struct bio * btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, gfp_t gfp_flags) @@ -2720,128 +2649,6 @@ int extent_invalidatepage(struct extent_io_tree *tree, } /* - * simple commit_write call, set_range_dirty is used to mark both - * the pages and the extent records as dirty - */ -int extent_commit_write(struct extent_io_tree *tree, - struct inode *inode, struct page *page, - unsigned from, unsigned to) -{ - loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to; - - set_page_extent_mapped(page); - set_page_dirty(page); - - if (pos > inode->i_size) { - i_size_write(inode, pos); - mark_inode_dirty(inode); - } - return 0; -} - -int extent_prepare_write(struct extent_io_tree *tree, - struct inode *inode, struct page *page, - unsigned from, unsigned to, get_extent_t *get_extent) -{ - u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT; - u64 page_end = page_start + PAGE_CACHE_SIZE - 1; - u64 block_start; - u64 orig_block_start; - u64 block_end; - u64 cur_end; - struct extent_map *em; - unsigned blocksize = 1 << inode->i_blkbits; - size_t pg_offset = 0; - size_t block_off_start; - size_t block_off_end; - int err = 0; - int iocount = 0; - int ret = 0; - int isnew; - - set_page_extent_mapped(page); - - block_start = (page_start + from) & ~((u64)blocksize - 1); - block_end = (page_start + to - 1) | (blocksize - 1); - orig_block_start = block_start; - - lock_extent(tree, page_start, page_end, GFP_NOFS); - while (block_start <= block_end) { - em = get_extent(inode, page, pg_offset, block_start, - block_end - block_start + 1, 1); - if (IS_ERR_OR_NULL(em)) - goto err; - - cur_end = min(block_end, extent_map_end(em) - 1); - block_off_start = block_start & (PAGE_CACHE_SIZE - 1); - block_off_end = block_off_start + blocksize; - isnew = clear_extent_new(tree, block_start, cur_end, GFP_NOFS); - - if (!PageUptodate(page) && isnew && - (block_off_end > to || block_off_start < from)) { - void *kaddr; - - kaddr = kmap_atomic(page, KM_USER0); - if (block_off_end > to) - memset(kaddr + to, 0, block_off_end - to); - if (block_off_start < from) - memset(kaddr + block_off_start, 0, - from - block_off_start); - flush_dcache_page(page); - kunmap_atomic(kaddr, KM_USER0); - } - if ((em->block_start != EXTENT_MAP_HOLE && - em->block_start != EXTENT_MAP_INLINE) && - !isnew && !PageUptodate(page) && - (block_off_end > to || block_off_start < from) && - !test_range_bit(tree, block_start, cur_end, - EXTENT_UPTODATE, 1, NULL)) { - u64 sector; - u64 extent_offset = block_start - em->start; - size_t iosize; - sector = (em->block_start + extent_offset) >> 9; - iosize = (cur_end - block_start + blocksize) & - ~((u64)blocksize - 1); - /* - * we've already got the extent locked, but we - * need to split the state such that our end_bio - * handler can clear the lock. - */ - set_extent_bit(tree, block_start, - block_start + iosize - 1, - EXTENT_LOCKED, 0, NULL, NULL, GFP_NOFS); - ret = submit_extent_page(READ, tree, page, - sector, iosize, pg_offset, em->bdev, - NULL, 1, - end_bio_extent_preparewrite, 0, - 0, 0); - if (ret && !err) - err = ret; - iocount++; - block_start = block_start + iosize; - } else { - struct extent_state *cached = NULL; - - set_extent_uptodate(tree, block_start, cur_end, &cached, - GFP_NOFS); - unlock_extent_cached(tree, block_start, cur_end, - &cached, GFP_NOFS); - block_start = cur_end + 1; - } - pg_offset = block_start & (PAGE_CACHE_SIZE - 1); - free_extent_map(em); - } - if (iocount) { - wait_extent_bit(tree, orig_block_start, - block_end, EXTENT_LOCKED); - } - check_page_uptodate(tree, page); -err: - /* FIXME, zero out newly allocated blocks on error */ - return err; -} - -/* * a helper for releasepage, this tests for areas of the page that * are locked or under IO and drops the related state bits if it is safe * to drop the page. @@ -2927,33 +2734,6 @@ int try_release_extent_mapping(struct extent_map_tree *map, return try_release_extent_state(map, tree, page, mask); } -sector_t extent_bmap(struct address_space *mapping, sector_t iblock, - get_extent_t *get_extent) -{ - struct inode *inode = mapping->host; - struct extent_state *cached_state = NULL; - u64 start = iblock << inode->i_blkbits; - sector_t sector = 0; - size_t blksize = (1 << inode->i_blkbits); - struct extent_map *em; - - lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + blksize - 1, - 0, &cached_state, GFP_NOFS); - em = get_extent(inode, NULL, 0, start, blksize, 0); - unlock_extent_cached(&BTRFS_I(inode)->io_tree, start, - start + blksize - 1, &cached_state, GFP_NOFS); - if (IS_ERR_OR_NULL(em)) - return 0; - - if (em->block_start > EXTENT_MAP_LAST_BYTE) - goto out; - - sector = (em->block_start + start - em->start) >> inode->i_blkbits; -out: - free_extent_map(em); - return sector; -} - /* * helper function for fiemap, which doesn't want to see any holes. * This maps until we find something past 'last' @@ -3437,13 +3217,6 @@ int clear_extent_buffer_dirty(struct extent_io_tree *tree, return 0; } -int wait_on_extent_buffer_writeback(struct extent_io_tree *tree, - struct extent_buffer *eb) -{ - return wait_on_extent_writeback(tree, eb->start, - eb->start + eb->len - 1); -} - int set_extent_buffer_dirty(struct extent_io_tree *tree, struct extent_buffer *eb) { |