diff options
| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2016-08-02 23:05:25 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-03 01:35:20 +0200 |
| commit | ad980c9ab77cc4e0edc5dd3361fd69daabeb99f9 (patch) | |
| tree | 4758726d573e01f8861e31a0b29eeb434e57af2c /fs/nilfs2/the_nilfs.h | |
| parent | nilfs2: refactor parser of snapshot mount option (diff) | |
| download | linux-ad980c9ab77cc4e0edc5dd3361fd69daabeb99f9.tar.xz linux-ad980c9ab77cc4e0edc5dd3361fd69daabeb99f9.zip | |
nilfs2: fix misuse of a semaphore in sysfs code
Variables ns_seg_seq, ns_segnum, ns_nextnum, ns_pseg_offset, ns_cno,
ns_ctime, ns_nongc_ctime, and ns_ndirtyblks, are protected by
ns_segctor_sem, but ns_sem is wrongly used by the nilfs sysfs code when
reading these variables. This fixes the misuse and clarifies which
semaphore protects them in the comment of the_nilfs struct.
Link: http://lkml.kernel.org/r/1465825507-3407-2-git-send-email-konishi.ryusuke@lab.ntt.co.jp
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2/the_nilfs.h')
| -rw-r--r-- | fs/nilfs2/the_nilfs.h | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h index 79d1421896d0..b305c6f033e7 100644 --- a/fs/nilfs2/the_nilfs.h +++ b/fs/nilfs2/the_nilfs.h @@ -122,11 +122,8 @@ struct the_nilfs { unsigned int ns_sb_update_freq; /* - * Following fields are dedicated to a writable FS-instance. - * Except for the period seeking checkpoint, code outside the segment - * constructor must lock a segment semaphore while accessing these - * fields. - * The writable FS-instance is sole during a lifetime of the_nilfs. + * The following fields are updated by a writable FS-instance. + * These fields are protected by ns_segctor_sem outside load_nilfs(). */ u64 ns_seg_seq; __u64 ns_segnum; |