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| author | Nadia Derbey <Nadia.Derbey@bull.net> | 2007-10-18 23:40:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-19 11:53:47 -0700 |
| commit | f4566f04854d78acfc74b9acb029744acde9d033 (patch) | |
| tree | 6fa631076d11511e2d9685b23c195835c31f4900 /ipc/util.h | |
| parent | 28028313134e9f11e49f74a4beaa47c91e5ebf06 (diff) | |
| download | lwn-f4566f04854d78acfc74b9acb029744acde9d033.tar.gz lwn-f4566f04854d78acfc74b9acb029744acde9d033.zip | |
ipc: fix wrong comments
This patch fixes the wrong / obsolete comments in the ipc code. Also adds
a missing lock around ipc_get_maxid() in shm_get_stat().
Signed-off-by: Nadia Derbey <Nadia.Derbey@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc/util.h')
| -rw-r--r-- | ipc/util.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/ipc/util.h b/ipc/util.h index 76f8a79902de..99414a36a250 100644 --- a/ipc/util.h +++ b/ipc/util.h @@ -54,7 +54,7 @@ struct ipc_params { * the calls to sys_msgget(), sys_semget(), sys_shmget() * . routine to call to create a new ipc object. Can be one of newque, * newary, newseg - * . routine to call to call to check permissions for a new ipc object. + * . routine to call to check permissions for a new ipc object. * Can be one of security_msg_associate, security_sem_associate, * security_shm_associate * . routine to call for an extra check if needed @@ -88,7 +88,8 @@ int ipc_get_maxid(struct ipc_ids *); /* must be called with both locks acquired. */ void ipc_rmid(struct ipc_ids *, struct kern_ipc_perm *); -int ipcperms (struct kern_ipc_perm *ipcp, short flg); +/* must be called with ipcp locked */ +int ipcperms(struct kern_ipc_perm *ipcp, short flg); /* for rare, potentially huge allocations. * both function can sleep @@ -131,6 +132,9 @@ static inline int ipc_buildid(struct ipc_ids *ids, int id, int seq) return SEQ_MULTIPLIER * seq + id; } +/* + * Must be called with ipcp locked + */ static inline int ipc_checkid(struct ipc_ids *ids, struct kern_ipc_perm *ipcp, int uid) { @@ -168,6 +172,16 @@ static inline struct kern_ipc_perm *ipc_lock_check(struct ipc_ids *ids, return out; } +/** + * ipcget - Common sys_*get() code + * @ns : namsepace + * @ids : IPC identifier set + * @ops : operations to be called on ipc object creation, permission checks + * and further checks + * @params : the parameters needed by the previous operations. + * + * Common routine called by sys_msgget(), sys_semget() and sys_shmget(). + */ static inline int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids, struct ipc_ops *ops, struct ipc_params *params) { |