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| author | Jens Axboe <jaxboe@fusionio.com> | 2011-04-05 21:51:48 (GMT) |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2011-04-05 21:51:48 (GMT) |
| commit | 7dcda1c96d7c643101d4a05579ef4512a4baa7ef (patch) | |
| tree | 62051d63c47a3df7381cdc294815e79da5ebdc93 | |
| parent | 929e27252e8ca69363f81f26af5eaba62cb4c572 (diff) | |
| download | linux-7dcda1c96d7c643101d4a05579ef4512a4baa7ef.tar.xz | |
fs: export empty_aops
With the ->sync_page() hook gone, we have a few users that
add their own static address_space_operations without any
functions defined.
fs/inode.c already has an empty_aops that it uses for init
purposes. Lets export that and use it in the places where
an otherwise empty aops was defined.
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
| -rw-r--r-- | fs/inode.c | 9 | ||||
| -rw-r--r-- | fs/nilfs2/page.c | 2 | ||||
| -rw-r--r-- | fs/ubifs/xattr.c | 4 | ||||
| -rw-r--r-- | include/linux/fs.h | 2 |
4 files changed, 12 insertions, 5 deletions
@@ -125,6 +125,14 @@ __cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_wb_list_lock); static DECLARE_RWSEM(iprune_sem); /* + * Empty aops. Can be used for the cases where the user does not + * define any of the address_space operations. + */ +const struct address_space_operations empty_aops = { +}; +EXPORT_SYMBOL(empty_aops); + +/* * Statistics gathering.. */ struct inodes_stat_t inodes_stat; @@ -176,7 +184,6 @@ int proc_nr_inodes(ctl_table *table, int write, */ int inode_init_always(struct super_block *sb, struct inode *inode) { - static const struct address_space_operations empty_aops; static const struct inode_operations empty_iops; static const struct file_operations empty_fops; struct address_space *const mapping = &inode->i_data; diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c index 9d2dc6b..1168059 100644 --- a/fs/nilfs2/page.c +++ b/fs/nilfs2/page.c @@ -495,8 +495,6 @@ unsigned nilfs_page_count_clean_buffers(struct page *page, void nilfs_mapping_init(struct address_space *mapping, struct backing_dev_info *bdi) { - static const struct address_space_operations empty_aops; - mapping->host = NULL; mapping->flags = 0; mapping_set_gfp_mask(mapping, GFP_NOFS); diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c index c74400f..3299f46 100644 --- a/fs/ubifs/xattr.c +++ b/fs/ubifs/xattr.c @@ -56,6 +56,7 @@ */ #include "ubifs.h" +#include <linux/fs.h> #include <linux/slab.h> #include <linux/xattr.h> #include <linux/posix_acl_xattr.h> @@ -80,7 +81,6 @@ enum { }; static const struct inode_operations none_inode_operations; -static const struct address_space_operations none_address_operations; static const struct file_operations none_file_operations; /** @@ -130,7 +130,7 @@ static int create_xattr(struct ubifs_info *c, struct inode *host, } /* Re-define all operations to be "nothing" */ - inode->i_mapping->a_ops = &none_address_operations; + inode->i_mapping->a_ops = &empty_aops; inode->i_op = &none_inode_operations; inode->i_fop = &none_file_operations; diff --git a/include/linux/fs.h b/include/linux/fs.h index 52f283c..1b95af3 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -613,6 +613,8 @@ struct address_space_operations { int (*error_remove_page)(struct address_space *, struct page *); }; +extern const struct address_space_operations empty_aops; + /* * pagecache_write_begin/pagecache_write_end must be used by general code * to write into the pagecache. |