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ipc/util.c: further variable name cleanups

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The varable names got a mess, thus standardize them again:

id: user space id. Called semid, shmid, msgid if the type is known.
    Most functions use "id" already.
idx: "index" for the idr lookup
    Right now, some functions use lid, ipc_addid() already uses idx as
    the variable name.
seq: sequence number, to avoid quick collisions of the user space id
key: user space key, used for the rhash tree

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Manfred Spraul <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Davidlohr Bueso <[email protected]>
Cc: Davidlohr Bueso <[email protected]>
Cc: Herbert Xu <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Michael Kerrisk <[email protected]>
Cc: Michal Hocko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Manfred Spraul 2018-08-21 22:02:00 -07:00 • committed by Linus Torvalds
commit 27c331a174
6 changed files with 27 additions and 27 deletions
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26
ipc/util.c
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@ -119,7 +119,7 @@ void ipc_init_ids(struct ipc_ids *ids)
init_rwsem(&ids->rwsem);
rhashtable_init(&ids->key_ht, &ipc_kht_params);
idr_init(&ids->ipcs_idr);
ids->max_id = -1;
ids->max_idx = -1;
#ifdef CONFIG_CHECKPOINT_RESTORE
ids->next_id = -1;
#endif
@ -237,7 +237,7 @@ static inline int ipc_idr_alloc(struct ipc_ids *ids, struct kern_ipc_perm *new)
* @limit: limit for the number of used ids
*
* Add an entry 'new' to the ipc ids idr. The permissions object is
* initialised and the first free entry is set up and the id assigned
* initialised and the first free entry is set up and the index assigned
* is returned. The 'new' entry is returned in a locked state on success.
*
* On failure the entry is not locked and a negative err-code is returned.
@ -291,8 +291,8 @@ int ipc_addid(struct ipc_ids *ids, struct kern_ipc_perm *new, int limit)
}
ids->in_use++;
if (idx > ids->max_id)
ids->max_id = idx;
if (idx > ids->max_idx)
ids->max_idx = idx;
return idx;
}
@ -431,20 +431,20 @@ static void ipc_kht_remove(struct ipc_ids *ids, struct kern_ipc_perm *ipcp)
*/
void ipc_rmid(struct ipc_ids *ids, struct kern_ipc_perm *ipcp)
{
int lid = ipcid_to_idx(ipcp->id);
int idx = ipcid_to_idx(ipcp->id);
idr_remove(&ids->ipcs_idr, lid);
idr_remove(&ids->ipcs_idr, idx);
ipc_kht_remove(ids, ipcp);
ids->in_use--;
ipcp->deleted = true;
if (unlikely(lid == ids->max_id)) {
if (unlikely(idx == ids->max_idx)) {
do {
lid--;
if (lid == -1)
idx--;
if (idx == -1)
break;
} while (!idr_find(&ids->ipcs_idr, lid));
ids->max_id = lid;
} while (!idr_find(&ids->ipcs_idr, idx));
ids->max_idx = idx;
}
}
@ -564,9 +564,9 @@ void ipc64_perm_to_ipc_perm(struct ipc64_perm *in, struct ipc_perm *out)
struct kern_ipc_perm *ipc_obtain_object_idr(struct ipc_ids *ids, int id)
{
struct kern_ipc_perm *out;
int lid = ipcid_to_idx(id);
int idx = ipcid_to_idx(id);
out = idr_find(&ids->ipcs_idr, lid);
out = idr_find(&ids->ipcs_idr, idx);
if (!out)
return ERR_PTR(-EINVAL);