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| author | David Woodhouse <dwmw2@infradead.org> | 2008-05-01 15:53:28 +0100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2008-05-01 15:53:28 +0100 |
| commit | 590fe34c47cb5c2d836ac76fabc5f160bf31a3f1 (patch) | |
| tree | 9a5d9a855629b916597582796391564891acf9a4 /fs/jffs2 | |
| parent | 4e571aba7bb25a3a069a7b88c0f63fe5a14c05c6 (diff) | |
| download | linux-590fe34c47cb5c2d836ac76fabc5f160bf31a3f1.tar.gz linux-590fe34c47cb5c2d836ac76fabc5f160bf31a3f1.tar.bz2 linux-590fe34c47cb5c2d836ac76fabc5f160bf31a3f1.zip | |
[JFFS2] Quiet lockdep false positive.
Don't hold f->sem while calling into jffs2_do_create(). It makes lockdep
unhappy, and we don't really need it -- the _reason_ it's a false
positive is because nobody else can see this inode yet and so nobody
will be trying to lock it anyway.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'fs/jffs2')
| -rw-r--r-- | fs/jffs2/dir.c | 7 | ||||
| -rw-r--r-- | fs/jffs2/write.c | 6 |
2 files changed, 10 insertions, 3 deletions
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c index c63e7a96af0d..2bba3d3435be 100644 --- a/fs/jffs2/dir.c +++ b/fs/jffs2/dir.c @@ -208,6 +208,13 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode, f = JFFS2_INODE_INFO(inode); dir_f = JFFS2_INODE_INFO(dir_i); + /* jffs2_do_create() will want to lock it, _after_ reserving + space and taking c-alloc_sem. If we keep it locked here, + lockdep gets unhappy (although it's a false positive; + nothing else will be looking at this inode yet so there's + no chance of AB-BA deadlock involving its f->sem). */ + mutex_unlock(&f->sem); + ret = jffs2_do_create(c, dir_f, f, ri, dentry->d_name.name, dentry->d_name.len); if (ret) diff --git a/fs/jffs2/write.c b/fs/jffs2/write.c index 665fce9797d3..87891bdd7915 100644 --- a/fs/jffs2/write.c +++ b/fs/jffs2/write.c @@ -438,10 +438,10 @@ int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, str ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); - if (ret) { - mutex_unlock(&f->sem); + if (ret) return ret; - } + + mutex_lock(&f->sem); ri->data_crc = cpu_to_je32(0); ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); |