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| author | Ryusuke Konishi <konishi.ryusuke@gmail.com> | 2023-11-27 23:30:21 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-13 12:51:11 +0100 |
| commit | e5606b783307b76b2d76feb8719a3ca7f036438b (patch) | |
| tree | d025063b9e955256fc3e6398e242c42d8ee077ed /fs/nilfs2 | |
| parent | 1fa500f494f1a84e52c749ec36d5960df3eacc68 (diff) | |
| download | linux-e5606b783307b76b2d76feb8719a3ca7f036438b.tar.gz linux-e5606b783307b76b2d76feb8719a3ca7f036438b.tar.bz2 linux-e5606b783307b76b2d76feb8719a3ca7f036438b.zip | |
nilfs2: eliminate staggered calls to kunmap in nilfs_rename
commit 8cf57c6df818f58fdad16a909506be213623a88e upstream.
In nilfs_rename(), calls to nilfs_put_page() to release pages obtained
with nilfs_find_entry() or nilfs_dotdot() are alternated in the normal
path.
When replacing the kernel memory mapping method from kmap to
kmap_local_{page,folio}, this violates the constraint on the calling order
of kunmap_local().
Swap the order of nilfs_put_page calls where the kmap sections of multiple
pages overlap so that they are nested, allowing direct replacement of
nilfs_put_page() -> unmap_and_put_page().
Without this reordering, that replacement will cause a kernel WARNING in
kunmap_local_indexed() on architectures with high memory mapping.
Link: https://lkml.kernel.org/r/20231127143036.2425-3-konishi.ryusuke@gmail.com
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Stable-dep-of: ee70999a988b ("nilfs2: handle errors that nilfs_prepare_chunk() may return")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/nilfs2')
| -rw-r--r-- | fs/nilfs2/namei.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c index cadf8914ad95..9dd4527d8f69 100644 --- a/fs/nilfs2/namei.c +++ b/fs/nilfs2/namei.c @@ -431,13 +431,14 @@ static int nilfs_rename(struct user_namespace *mnt_userns, old_inode->i_ctime = current_time(old_inode); nilfs_delete_entry(old_de, old_page); - nilfs_put_page(old_page); if (dir_de) { nilfs_set_link(old_inode, dir_de, dir_page, new_dir); nilfs_put_page(dir_page); drop_nlink(old_dir); } + nilfs_put_page(old_page); + nilfs_mark_inode_dirty(old_dir); nilfs_mark_inode_dirty(old_inode); |