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authorNadia Derbey <Nadia.Derbey@bull.net>2007-10-18 23:40:53 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-19 11:53:47 -0700
commitf4566f04854d78acfc74b9acb029744acde9d033 (patch)
tree6fa631076d11511e2d9685b23c195835c31f4900 /ipc/util.h
parent28028313134e9f11e49f74a4beaa47c91e5ebf06 (diff)
downloadvexpress-lsk-f4566f04854d78acfc74b9acb029744acde9d033.tar.gz
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.h18
1 files changed, 16 insertions, 2 deletions
diff --git a/ipc/util.h b/ipc/util.h
index 76f8a79902d..99414a36a25 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)
{