diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-25 21:25:02 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-25 21:25:02 -0800 |
| commit | 8f5f90a872c38b4e78f3cc95e8a25434b98e4db2 (patch) | |
| tree | 36c50b0c97286ab89c85016f7ab281f8e843c05c /ipc/util.c | |
| parent | c0cd2da16b431a2007ea83865f3dd1530c1643a5 (diff) | |
| parent | 949db153b6466c6f7cad5a427ecea94985927311 (diff) | |
Merge 3.8-rc5 into staging-next
This resolves a merge issue with a iio driver, and the zram code.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'ipc/util.c')
| -rw-r--r-- | ipc/util.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/ipc/util.c b/ipc/util.c index 72fd0785ac9..74e1d9c7a98 100644 --- a/ipc/util.c +++ b/ipc/util.c @@ -122,6 +122,7 @@ void ipc_init_ids(struct ipc_ids *ids) ids->in_use = 0; ids->seq = 0; + ids->next_id = -1; { int seq_limit = INT_MAX/SEQ_MULTIPLIER; if (seq_limit > USHRT_MAX) @@ -252,6 +253,7 @@ int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size) kuid_t euid; kgid_t egid; int id, err; + int next_id = ids->next_id; if (size > IPCMNI) size = IPCMNI; @@ -264,7 +266,8 @@ int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size) rcu_read_lock(); spin_lock(&new->lock); - err = idr_get_new(&ids->ipcs_idr, new, &id); + err = idr_get_new_above(&ids->ipcs_idr, new, + (next_id < 0) ? 0 : ipcid_to_idx(next_id), &id); if (err) { spin_unlock(&new->lock); rcu_read_unlock(); @@ -277,9 +280,14 @@ int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size) new->cuid = new->uid = euid; new->gid = new->cgid = egid; - new->seq = ids->seq++; - if(ids->seq > ids->seq_max) - ids->seq = 0; + if (next_id < 0) { + new->seq = ids->seq++; + if (ids->seq > ids->seq_max) + ids->seq = 0; + } else { + new->seq = ipcid_to_seqx(next_id); + ids->next_id = -1; + } new->id = ipc_buildid(id, new->seq); return id; |