A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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reorganize do_make_slave()

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Make sure that clone_mnt() never returns a mount with MNT_SHARED in
flags, but without a valid ->mnt_group_id.  That allows to demystify
do_make_slave() quite a bit, among other things.

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2016-11-20 19:33:09 -05:00
commit 5235d448c4
2 changed files with 38 additions and 38 deletions
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2
fs/namespace.c
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@ -1030,6 +1030,8 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root,
if (IS_MNT_SLAVE(old))
list_add(&mnt->mnt_slave, &old->mnt_slave);
mnt->mnt_master = old->mnt_master;
} else {
CLEAR_MNT_SHARED(mnt);
}
if (flag & CL_MAKE_SHARED)
set_mnt_shared(mnt);