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authorGao Xiang <gaoxiang25@huawei.com>2020-02-20 10:46:42 +0800
committerGao Xiang <gaoxiang25@huawei.com>2020-03-03 23:27:25 +0800
commit64094a04414f0b2fb7e31e1c57a67e91e390d66c (patch)
treee39ebae96a3290a69216c187d4298c7da8bdc3a8 /fs/erofs/super.c
parent98d54f81e36ba3bf92172791eba5ca5bd813989b (diff)
erofs: convert workstn to XArray
XArray has friendly APIs and it will replace the old radix tree in the near future. This convert makes use of __xa_cmpxchg when inserting on a just inserted item by other thread. In detail, instead of totally looking up again as what we did for the old radix tree, it will try to legitimize the current in-tree item in the XArray therefore more effective. In addition, naming is rather a challenge for non-English speaker like me. The basic idea of workstn is to provide a runtime sparse array with items arranged in the physical block number order. Such items (was called workgroup) can be used to record compress clusters or for later new features. However, both workgroup and workstn seem not good names from whatever point of view, so I'd like to rename them as pslot and managed_pslots to stand for physical slots. This patch handles the second as a part of the radix tree convert. Cc: Matthew Wilcox <willy@infradead.org> Link: https://lore.kernel.org/r/20200220024642.91529-1-gaoxiang25@huawei.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Diffstat (limited to 'fs/erofs/super.c')
-rw-r--r--fs/erofs/super.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 057e6d7b5b7f..b514c67e5fc2 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -425,7 +425,7 @@ static int erofs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_flags &= ~SB_POSIXACL;
#ifdef CONFIG_EROFS_FS_ZIP
- INIT_RADIX_TREE(&sbi->workstn_tree, GFP_ATOMIC);
+ xa_init(&sbi->managed_pslots);
#endif
/* get the root inode */