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authorChristoph Hellwig <hch@lst.de>2021-06-28 19:36:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-06-29 10:53:48 -0700
commit0af573780b0b13fceb7fabd49dc1b073cee9a507 (patch)
tree54d4fea3fca5b5f4ac90f89b554f4c13a1f79a39 /fs/ecryptfs/mmap.c
parentc1e3dbe9818e3caa4e467255a348df56912ca549 (diff)
mm: require ->set_page_dirty to be explicitly wired up
Remove the CONFIG_BLOCK default to __set_page_dirty_buffers and just wire that method up for the missing instances. [hch@lst.de: ecryptfs: add a ->set_page_dirty cludge] Link: https://lkml.kernel.org/r/20210624125250.536369-1-hch@lst.de Link: https://lkml.kernel.org/r/20210614061512.3966143-4-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> Cc: Tyler Hicks <code@tyhicks.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ecryptfs/mmap.c')
-rw-r--r--fs/ecryptfs/mmap.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 392e721b50a3..7d85e64ea62f 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -533,7 +533,20 @@ static sector_t ecryptfs_bmap(struct address_space *mapping, sector_t block)
return block;
}
+#include <linux/buffer_head.h>
+
const struct address_space_operations ecryptfs_aops = {
+ /*
+ * XXX: This is pretty broken for multiple reasons: ecryptfs does not
+ * actually use buffer_heads, and ecryptfs will crash without
+ * CONFIG_BLOCK. But it matches the behavior before the default for
+ * address_space_operations without the ->set_page_dirty method was
+ * cleaned up, so this is the best we can do without maintainer
+ * feedback.
+ */
+#ifdef CONFIG_BLOCK
+ .set_page_dirty = __set_page_dirty_buffers,
+#endif
.writepage = ecryptfs_writepage,
.readpage = ecryptfs_readpage,
.write_begin = ecryptfs_write_begin,