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Subject[RFC v16][PATCH 35/43] c/r (ipc): export interface from ipc/shm.c to delete ipc shm
Date
Export shmctl_down() which will be used in the next patch during
restart to delete an ipc shm (the shm is mapped already, so it
won't be lost).

Signed-off-by: Oren Laadan <orenl@cs.columbia.edu>
---
include/linux/shm.h | 4 ++++
ipc/shm.c | 4 ++--
2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/linux/shm.h b/include/linux/shm.h
index eca6235..ec36e99 100644
--- a/include/linux/shm.h
+++ b/include/linux/shm.h
@@ -118,6 +118,10 @@ static inline int is_file_shm_hugepages(struct file *file)
}
#endif

+struct ipc_namespace;
+extern int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd,
+ struct shmid_ds __user *buf, int version);
+
#endif /* __KERNEL__ */

#endif /* _LINUX_SHM_H_ */
diff --git a/ipc/shm.c b/ipc/shm.c
index 7dd5f0c..8aba22f 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -598,8 +598,8 @@ static void shm_get_stat(struct ipc_namespace *ns, unsigned long *rss,
* to be held in write mode.
* NOTE: no locks must be held, the rw_mutex is taken inside this function.
*/
-static int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd,
- struct shmid_ds __user *buf, int version)
+int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd,
+ struct shmid_ds __user *buf, int version)
{
struct kern_ipc_perm *ipcp;
struct shmid64_ds shmid64;
--
1.6.0.4


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