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| author | Al Viro <viro@zeniv.linux.org.uk> | 2025-06-25 14:48:50 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2025-06-29 19:03:46 -0400 |
| commit | 725ab435ff6e31faca26b8234f9f04c19f772b18 (patch) | |
| tree | d6c3473ea3f3271eb87c9ec768ea7edd13fbbac6 /fs/pnode.h | |
| parent | aab771f34e63ef89e195b63d121abcb55eebfde6 (diff) | |
get rid of CL_SHARE_TO_SLAVE
the only difference between it and CL_SLAVE is in this predicate
in clone_mnt():
if ((flag & CL_SLAVE) ||
((flag & CL_SHARED_TO_SLAVE) && IS_MNT_SHARED(old))) {
However, in case of CL_SHARED_TO_SLAVE we have not allocated any
mount group ids since the time we'd grabbed namespace_sem, so
IS_MNT_SHARED() is equivalent to non-zero ->mnt_group_id. And
in case of CL_SLAVE old has come either from the original tree,
which had ->mnt_group_id allocated for all nodes or from result
of sequence of CL_MAKE_SHARED or CL_MAKE_SHARED|CL_SLAVE copies,
ultimately going back to the original tree. In both cases we are
guaranteed that old->mnt_group_id will be non-zero.
In other words, the predicate is always equal to
(flags & (CL_SLAVE | CL_SHARED_TO_SLAVE)) && old->mnt_group_id
and with that replacement CL_SLAVE and CL_SHARED_TO_SLAVE have exact
same behaviour.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/pnode.h')
| -rw-r--r-- | fs/pnode.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/pnode.h b/fs/pnode.h index 507e30e7a420..00ab153e3e9d 100644 --- a/fs/pnode.h +++ b/fs/pnode.h @@ -25,7 +25,6 @@ #define CL_COPY_UNBINDABLE 0x04 #define CL_MAKE_SHARED 0x08 #define CL_PRIVATE 0x10 -#define CL_SHARED_TO_SLAVE 0x20 #define CL_COPY_MNT_NS_FILE 0x40 /* |