The patch titled
ipc-namespace-remove-config_ipc_ns linkage fix
has been added to the -mm tree. Its filename is
ipc-namespace-remove-config_ipc_ns-linkage-fix.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: ipc-namespace-remove-config_ipc_ns linkage fix
From: Andrew Morton <akpm@xxxxxxxx>
Documentation/SubmitChecklist, item 2.
kernel/built-in.o: In function `sys_unshare':
: undefined reference to `unshare_ipcs'
kernel/built-in.o: In function `sys_unshare':
: undefined reference to `free_ipc_ns'
kernel/built-in.o: In function `free_nsproxy':
: undefined reference to `free_ipc_ns'
kernel/built-in.o: In function `copy_namespaces':
: undefined reference to `copy_ipcs'
kernel/built-in.o: In function `copy_namespaces':
: undefined reference to `free_ipc_ns'
make: *** [.tmp_vmlinux1] Error 1
Cc: Cedric Le Goater <clg@xxxxxxxxxx>
Cc: "Serge E. Hallyn" <serue@xxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Herbert Poetzl <herbert@xxxxxxxxxxxx>
Cc: Pavel Emelianov <xemul@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/ipc.h | 27 ++++++++++++++++++++++++---
1 file changed, 24 insertions(+), 3 deletions(-)
diff -puN include/linux/ipc.h~ipc-namespace-remove-config_ipc_ns-linkage-fix include/linux/ipc.h
--- a/include/linux/ipc.h~ipc-namespace-remove-config_ipc_ns-linkage-fix
+++ a/include/linux/ipc.h
@@ -52,6 +52,7 @@ struct ipc_perm
#ifdef __KERNEL__
#include <linux/kref.h>
+#include <linux/sched.h>
#define IPCMNI 32768 /* <= MAX_INT limit for ipc arrays (including sysctl changes) */
@@ -92,24 +93,44 @@ extern struct ipc_namespace init_ipc_ns;
#ifdef CONFIG_SYSVIPC
#define INIT_IPC_NS(ns) .ns = &init_ipc_ns,
-#else
-#define INIT_IPC_NS(ns)
-#endif
extern void free_ipc_ns(struct kref *kref);
extern int copy_ipcs(unsigned long flags, struct task_struct *tsk);
extern int unshare_ipcs(unsigned long flags, struct ipc_namespace **ns);
+#else
+#define INIT_IPC_NS(ns)
+
+static inline void free_ipc_ns(struct kref *kref)
+{
+}
+static inline int copy_ipcs(unsigned long flags, struct task_struct *tsk)
+{
+ return 0;
+}
+static inline int unshare_ipcs(unsigned long flags, struct ipc_namespace **ns)
+{
+ if (flags & CLONE_NEWIPC)
+ return -EINVAL;
+
+ return 0;
+}
+#endif
+
static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
{
+#ifdef CONFIG_SYSVIPC
if (ns)
kref_get(&ns->kref);
+#endif
return ns;
}
static inline void put_ipc_ns(struct ipc_namespace *ns)
{
+#ifdef CONFIG_SYSVIPC
kref_put(&ns->kref, free_ipc_ns);
+#endif
}
#endif /* __KERNEL__ */
_
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