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wrappers for ->i_mutex access

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parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).

Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-01-22 15:40:57 -05:00
parent 57b8f112cf
commit 5955102c99
177 changed files with 908 additions and 883 deletions
Download patch file Download diff file Expand all files Collapse all files

8
ipc/mqueue.c
View file

@ -795,7 +795,7 @@ SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, umode_t, mode,
ro = mnt_want_write(mnt); /* we'll drop it in any case */
error = 0;
mutex_lock(&d_inode(root)->i_mutex);
inode_lock(d_inode(root));
path.dentry = lookup_one_len(name->name, root, strlen(name->name));
if (IS_ERR(path.dentry)) {
error = PTR_ERR(path.dentry);
@ -841,7 +841,7 @@ out_putfd:
put_unused_fd(fd);
fd = error;
}
mutex_unlock(&d_inode(root)->i_mutex);
inode_unlock(d_inode(root));
if (!ro)
mnt_drop_write(mnt);
out_putname:
@ -866,7 +866,7 @@ SYSCALL_DEFINE1(mq_unlink, const char __user *, u_name)
err = mnt_want_write(mnt);
if (err)
goto out_name;
mutex_lock_nested(&d_inode(mnt->mnt_root)->i_mutex, I_MUTEX_PARENT);
inode_lock_nested(d_inode(mnt->mnt_root), I_MUTEX_PARENT);
dentry = lookup_one_len(name->name, mnt->mnt_root,
strlen(name->name));
if (IS_ERR(dentry)) {
@ -884,7 +884,7 @@ SYSCALL_DEFINE1(mq_unlink, const char __user *, u_name)
dput(dentry);
out_unlock:
mutex_unlock(&d_inode(mnt->mnt_root)->i_mutex);
inode_unlock(d_inode(mnt->mnt_root));
if (inode)
iput(inode);
mnt_drop_write(mnt);