This is a note to let you know that I've just added the patch titled
erofs: fix ztailpacking for subpage compressed blocks
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
erofs-fix-ztailpacking-for-subpage-compressed-blocks.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 090a3e4bbf79ff565581365f93f900258f36c13f
Author: Gao Xiang <xiang@xxxxxxxxxx>
Date: Fri Dec 15 00:13:37 2023 +0800
erofs: fix ztailpacking for subpage compressed blocks
[ Upstream commit e5aba911dee5e20fa82efbe13e0af8f38ea459e7 ]
`pageofs_in` should be the compressed data offset of the page rather
than of the block.
Acked-by: Chao Yu <chao@xxxxxxxxxx>
Reviewed-by: Yue Hu <huyue2@xxxxxxxxxxx>
Signed-off-by: Gao Xiang <hsiangkao@xxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231214161337.753049-1-hsiangkao@xxxxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index cf9a2fa7f55d..47e71964eeff 100644
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -652,7 +652,6 @@ static int z_erofs_register_pcluster(struct z_erofs_decompress_frontend *fe)
if (ztailpacking) {
pcl->obj.index = 0; /* which indicates ztailpacking */
- pcl->pageofs_in = erofs_blkoff(map->m_pa);
pcl->tailpacking_size = map->m_plen;
} else {
pcl->obj.index = map->m_pa >> PAGE_SHIFT;
@@ -852,6 +851,7 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
get_page(fe->map.buf.page);
WRITE_ONCE(fe->pcl->compressed_bvecs[0].page,
fe->map.buf.page);
+ fe->pcl->pageofs_in = map->m_pa & ~PAGE_MASK;
fe->mode = Z_EROFS_PCLUSTER_FOLLOWED_NOINPLACE;
} else {
/* bind cache first when cached decompression is preferred */
