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authorChristoph Hellwig <hch@lst.de>2021-06-28 19:36:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-06-29 10:53:48 -0700
commitc1e3dbe9818e3caa4e467255a348df56912ca549 (patch)
tree1b84ab33db10bade1b6e47429080062f5fff7f4c /fs/libfs.c
parent34ebcce793245e64db3b40f24486c59668e1f059 (diff)
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fs: move ramfs_aops to libfs
Move the ramfs aops to libfs and reuse them for kernfs and configfs. Thosw two did not wire up ->set_page_dirty before and now get __set_page_dirty_no_writeback, which is the right one for no-writeback address_space usage. Drop the now unused exports of the libfs helpers only used for ramfs-style pagecache usage. Link: https://lkml.kernel.org/r/20210614061512.3966143-3-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/libfs.c')
-rw-r--r--fs/libfs.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/fs/libfs.c b/fs/libfs.c
index e9b29c6ffccb..2d7f086b93d6 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -512,7 +512,7 @@ int simple_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
}
EXPORT_SYMBOL(simple_setattr);
-int simple_readpage(struct file *file, struct page *page)
+static int simple_readpage(struct file *file, struct page *page)
{
clear_highpage(page);
flush_dcache_page(page);
@@ -520,7 +520,6 @@ int simple_readpage(struct file *file, struct page *page)
unlock_page(page);
return 0;
}
-EXPORT_SYMBOL(simple_readpage);
int simple_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
@@ -568,7 +567,7 @@ EXPORT_SYMBOL(simple_write_begin);
*
* Use *ONLY* with simple_readpage()
*/
-int simple_write_end(struct file *file, struct address_space *mapping,
+static int simple_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata)
{
@@ -597,7 +596,17 @@ int simple_write_end(struct file *file, struct address_space *mapping,
return copied;
}
-EXPORT_SYMBOL(simple_write_end);
+
+/*
+ * Provides ramfs-style behavior: data in the pagecache, but no writeback.
+ */
+const struct address_space_operations ram_aops = {
+ .readpage = simple_readpage,
+ .write_begin = simple_write_begin,
+ .write_end = simple_write_end,
+ .set_page_dirty = __set_page_dirty_no_writeback,
+};
+EXPORT_SYMBOL(ram_aops);
/*
* the inodes created here are not hashed. If you use iunique to generate