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restore killability of old mutex_lock_killable(&inode->i_mutex) users 

The ones that are taking it exclusive, that is...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
steinar/wifi_calib_4_9_kernel
Al Viro 2016-05-26 00:05:12 -04:00
parent 887bddfa90
commit 002354112f
3 changed files with 14 additions and 20 deletions
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18
fs/btrfs/ioctl.c
View File

@ -846,11 +846,9 @@ static noinline int btrfs_mksubvol(struct path *parent,
struct dentry *dentry;
int error;
inode_lock_nested(dir, I_MUTEX_PARENT);
// XXX: should've been
// mutex_lock_killable_nested(&dir->i_mutex, I_MUTEX_PARENT);
// if (error == -EINTR)
// return error;
error = down_write_killable_nested(&dir->i_rwsem, I_MUTEX_PARENT);
if (error == -EINTR)
return error;
dentry = lookup_one_len(name, parent->dentry, namelen);
error = PTR_ERR(dentry);
@ -2377,11 +2375,9 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
goto out;
inode_lock_nested(dir, I_MUTEX_PARENT);
// XXX: should've been
// err = mutex_lock_killable_nested(&dir->i_mutex, I_MUTEX_PARENT);
// if (err == -EINTR)
// goto out_drop_write;
err = down_write_killable_nested(&dir->i_rwsem, I_MUTEX_PARENT);
if (err == -EINTR)
goto out_drop_write;
dentry = lookup_one_len(vol_args->name, parent, namelen);
if (IS_ERR(dentry)) {
err = PTR_ERR(dentry);
@ -2571,7 +2567,7 @@ out_dput:
dput(dentry);
out_unlock_dir:
inode_unlock(dir);
//out_drop_write:
out_drop_write:
mnt_drop_write_file(file);
out:
kfree(vol_args);

4
fs/overlayfs/readdir.c
View File

@ -218,9 +218,7 @@ static int ovl_check_whiteouts(struct dentry *dir, struct ovl_readdir_data *rdd)
cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE);
old_cred = override_creds(override_cred);
inode_lock(dir->d_inode);
err = 0;
// XXX: err = mutex_lock_killable(&dir->d_inode->i_mutex);
err = down_write_killable(&dir->d_inode->i_rwsem);
if (!err) {
while (rdd->first_maybe_whiteout) {
p = rdd->first_maybe_whiteout;

12
fs/readdir.c
View File

@ -35,13 +35,13 @@ int iterate_dir(struct file *file, struct dir_context *ctx)
if (res)
goto out;
if (shared)
if (shared) {
inode_lock_shared(inode);
else
inode_lock(inode);
// res = mutex_lock_killable(&inode->i_mutex);
// if (res)
// goto out;
} else {
res = down_write_killable(&inode->i_rwsem);
if (res)
goto out;
}
res = -ENOENT;
if (!IS_DEADDIR(inode)) {