diff options
Diffstat (limited to 'ipc')
-rw-r--r-- | ipc/util.c | 13 | ||||
-rw-r--r-- | ipc/util.h | 1 |
2 files changed, 3 insertions, 11 deletions
@@ -139,19 +139,10 @@ __initcall(ipc_init); */ void ipc_init_ids(struct ipc_ids *ids) { - init_rwsem(&ids->rwsem); - ids->in_use = 0; ids->seq = 0; ids->next_id = -1; - { - int seq_limit = INT_MAX/SEQ_MULTIPLIER; - if (seq_limit > USHRT_MAX) - ids->seq_max = USHRT_MAX; - else - ids->seq_max = seq_limit; - } - + init_rwsem(&ids->rwsem); idr_init(&ids->ipcs_idr); } @@ -304,7 +295,7 @@ int ipc_addid(struct ipc_ids *ids, struct kern_ipc_perm *new, int size) if (next_id < 0) { new->seq = ids->seq++; - if (ids->seq > ids->seq_max) + if (ids->seq > IPCID_SEQ_MAX) ids->seq = 0; } else { new->seq = ipcid_to_seqx(next_id); @@ -100,6 +100,7 @@ void __init ipc_init_proc_interface(const char *path, const char *header, #define ipcid_to_idx(id) ((id) % SEQ_MULTIPLIER) #define ipcid_to_seqx(id) ((id) / SEQ_MULTIPLIER) +#define IPCID_SEQ_MAX min_t(int, INT_MAX/SEQ_MULTIPLIER, USHRT_MAX) /* must be called with ids->rwsem acquired for writing */ int ipc_addid(struct ipc_ids *, struct kern_ipc_perm *, int); |