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ipc: fix wrong comments

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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>
This commit is contained in:
Nadia Derbey 2007-10-18 23:40:53 -07:00 • committed by Linus Torvalds
parent 2802831313
commit f4566f0485
5 changed files with 118 additions and 45 deletions
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18
ipc/util.h
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@ -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)
{