The patch titled
Subject: ecryptfs: add a ->set_page_dirty cludge
has been added to the -mm tree. Its filename is
mm-require-set_page_dirty-to-be-explicitly-wire-up-fix.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-require-set_page_dirty-to-be-explicitly-wire-up-fix.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-require-set_page_dirty-to-be-explicitly-wire-up-fix.patch
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------------------------------------------------------
From: Christoph Hellwig <hch@xxxxxx>
Subject: ecryptfs: add a ->set_page_dirty cludge
"fix" ecryptfs to work the same as before the recent change to the
behavior without a ->set_page_dirty method.
Link: https://lkml.kernel.org/r/20210624125250.536369-1-hch@xxxxxx
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Acked-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Tyler Hicks <code@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ecryptfs/mmap.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
--- a/fs/ecryptfs/mmap.c~mm-require-set_page_dirty-to-be-explicitly-wire-up-fix
+++ a/fs/ecryptfs/mmap.c
@@ -533,7 +533,20 @@ static sector_t ecryptfs_bmap(struct add
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,
_
Patches currently in -mm which might be from hch@xxxxxx are
fs-unexport-__set_page_dirty.patch
fs-move-ramfs_aops-to-libfs.patch
mm-require-set_page_dirty-to-be-explicitly-wire-up.patch
mm-require-set_page_dirty-to-be-explicitly-wire-up-fix.patch
