diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/bio.c | 2 | ||||
| -rw-r--r-- | fs/buffer.c | 11 | ||||
| -rw-r--r-- | fs/fs-writeback.c | 4 | ||||
| -rw-r--r-- | fs/mpage.c | 92 | ||||
| -rw-r--r-- | fs/proc/base.c | 2 | ||||
| -rw-r--r-- | fs/seq_file.c | 9 | ||||
| -rw-r--r-- | fs/sysfs/file.c | 4 |
7 files changed, 67 insertions, 57 deletions
@@ -140,6 +140,7 @@ inline void bio_init(struct bio *bio) * bio_alloc_bioset - allocate a bio for I/O * @gfp_mask: the GFP_ mask given to the slab allocator * @nr_iovecs: number of iovecs to pre-allocate + * @bs: the bio_set to allocate from * * Description: * bio_alloc_bioset will first try it's on mempool to satisfy the allocation. @@ -629,6 +630,7 @@ out: /** * bio_map_user - map user address into bio + * @q: the request_queue_t for the bio * @bdev: destination block device * @uaddr: start of user address * @len: length in bytes diff --git a/fs/buffer.c b/fs/buffer.c index 792cbac..5f525b3 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -774,15 +774,14 @@ repeat: /** * sync_mapping_buffers - write out and wait upon a mapping's "associated" * buffers - * @buffer_mapping - the mapping which backs the buffers' data - * @mapping - the mapping which wants those buffers written + * @mapping: the mapping which wants those buffers written * * Starts I/O against the buffers at mapping->private_list, and waits upon * that I/O. * - * Basically, this is a convenience function for fsync(). @buffer_mapping is - * the blockdev which "owns" the buffers and @mapping is a file or directory - * which needs those buffers to be written for a successful fsync(). + * Basically, this is a convenience function for fsync(). + * @mapping is a file or directory which needs those buffers to be written for + * a successful fsync(). */ int sync_mapping_buffers(struct address_space *mapping) { @@ -1263,6 +1262,7 @@ __getblk_slow(struct block_device *bdev, sector_t block, int size) /** * mark_buffer_dirty - mark a buffer_head as needing writeout + * @bh: the buffer_head to mark dirty * * mark_buffer_dirty() will set the dirty bit against the buffer, then set its * backing page dirty, then tag the page as dirty in its address_space's radix @@ -1501,6 +1501,7 @@ EXPORT_SYMBOL(__breadahead); /** * __bread() - reads a specified block and returns the bh + * @bdev: the block_device to read from * @block: number of block * @size: size (in bytes) to read * diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index d6efb36..8e050fa 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -512,7 +512,8 @@ restart: } /** - * sync_inodes + * sync_inodes - writes all inodes to disk + * @wait: wait for completion * * sync_inodes() goes through each super block's dirty inode list, writes the * inodes out, waits on the writeout and puts the inodes back on the normal @@ -604,6 +605,7 @@ EXPORT_SYMBOL(sync_inode); /** * generic_osync_inode - flush all dirty data for a given inode to disk * @inode: inode to write + * @mapping: the address_space that should be flushed * @what: what to write and wait upon * * This can be called by file_write functions for files which have the @@ -160,52 +160,6 @@ map_buffer_to_page(struct page *page, struct buffer_head *bh, int page_block) } while (page_bh != head); } -/** - * mpage_readpages - populate an address space with some pages, and - * start reads against them. - * - * @mapping: the address_space - * @pages: The address of a list_head which contains the target pages. These - * pages have their ->index populated and are otherwise uninitialised. - * - * The page at @pages->prev has the lowest file offset, and reads should be - * issued in @pages->prev to @pages->next order. - * - * @nr_pages: The number of pages at *@pages - * @get_block: The filesystem's block mapper function. - * - * This function walks the pages and the blocks within each page, building and - * emitting large BIOs. - * - * If anything unusual happens, such as: - * - * - encountering a page which has buffers - * - encountering a page which has a non-hole after a hole - * - encountering a page with non-contiguous blocks - * - * then this code just gives up and calls the buffer_head-based read function. - * It does handle a page which has holes at the end - that is a common case: - * the end-of-file on blocksize < PAGE_CACHE_SIZE setups. - * - * BH_Boundary explanation: - * - * There is a problem. The mpage read code assembles several pages, gets all - * their disk mappings, and then submits them all. That's fine, but obtaining - * the disk mappings may require I/O. Reads of indirect blocks, for example. - * - * So an mpage read of the first 16 blocks of an ext2 file will cause I/O to be - * submitted in the following order: - * 12 0 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16 - * because the indirect block has to be read to get the mappings of blocks - * 13,14,15,16. Obviously, this impacts performance. - * - * So what we do it to allow the filesystem's get_block() function to set - * BH_Boundary when it maps block 11. BH_Boundary says: mapping of the block - * after this one will require I/O against a block which is probably close to - * this one. So you should push what I/O you have currently accumulated. - * - * This all causes the disk requests to be issued in the correct order. - */ static struct bio * do_mpage_readpage(struct bio *bio, struct page *page, unsigned nr_pages, sector_t *last_block_in_bio, get_block_t get_block) @@ -320,6 +274,52 @@ confused: goto out; } +/** + * mpage_readpages - populate an address space with some pages, and + * start reads against them. + * + * @mapping: the address_space + * @pages: The address of a list_head which contains the target pages. These + * pages have their ->index populated and are otherwise uninitialised. + * + * The page at @pages->prev has the lowest file offset, and reads should be + * issued in @pages->prev to @pages->next order. + * + * @nr_pages: The number of pages at *@pages + * @get_block: The filesystem's block mapper function. + * + * This function walks the pages and the blocks within each page, building and + * emitting large BIOs. + * + * If anything unusual happens, such as: + * + * - encountering a page which has buffers + * - encountering a page which has a non-hole after a hole + * - encountering a page with non-contiguous blocks + * + * then this code just gives up and calls the buffer_head-based read function. + * It does handle a page which has holes at the end - that is a common case: + * the end-of-file on blocksize < PAGE_CACHE_SIZE setups. + * + * BH_Boundary explanation: + * + * There is a problem. The mpage read code assembles several pages, gets all + * their disk mappings, and then submits them all. That's fine, but obtaining + * the disk mappings may require I/O. Reads of indirect blocks, for example. + * + * So an mpage read of the first 16 blocks of an ext2 file will cause I/O to be + * submitted in the following order: + * 12 0 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16 + * because the indirect block has to be read to get the mappings of blocks + * 13,14,15,16. Obviously, this impacts performance. + * + * So what we do it to allow the filesystem's get_block() function to set + * BH_Boundary when it maps block 11. BH_Boundary says: mapping of the block + * after this one will require I/O against a block which is probably close to + * this one. So you should push what I/O you have currently accumulated. + * + * This all causes the disk requests to be issued in the correct order. + */ int mpage_readpages(struct address_space *mapping, struct list_head *pages, unsigned nr_pages, get_block_t get_block) diff --git a/fs/proc/base.c b/fs/proc/base.c index 2b8cd04..07cafdf 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1742,7 +1742,7 @@ struct dentry *proc_pid_unhash(struct task_struct *p) /** * proc_pid_flush - recover memory used by stale /proc/@pid/x entries - * @proc_entry: directoy to prune. + * @proc_dentry: directoy to prune. * * Shrink the /proc directory that was used by the just killed thread. */ diff --git a/fs/seq_file.c b/fs/seq_file.c index 650c43b..38ef913 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -51,7 +51,10 @@ EXPORT_SYMBOL(seq_open); /** * seq_read - ->read() method for sequential files. - * @file, @buf, @size, @ppos: see file_operations method + * @file: the file to read from + * @buf: the buffer to read to + * @size: the maximum number of bytes to read + * @ppos: the current position in the file * * Ready-made ->f_op->read() */ @@ -219,7 +222,9 @@ Eoverflow: /** * seq_lseek - ->llseek() method for sequential files. - * @file, @offset, @origin: see file_operations method + * @file: the file in question + * @offset: new position + * @origin: 0 for absolute, 1 for relative position * * Ready-made ->f_op->llseek() */ diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index da25aeb..3642080 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -96,7 +96,7 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer /** * flush_read_buffer - push buffer to userspace. * @buffer: data buffer for file. - * @userbuf: user-passed buffer. + * @buf: user-passed buffer. * @count: number of bytes requested. * @ppos: file position. * @@ -164,7 +164,7 @@ out: /** * fill_write_buffer - copy buffer from userspace. * @buffer: data buffer for file. - * @userbuf: data from user. + * @buf: data from user. * @count: number of bytes in @userbuf. * * Allocate @buffer->page if it hasn't been already, then |
