From: "Eric W. Biederman" pids aren't something that drivers should care about. However there are a lot of helper layers in the kernel that do care, and are built as modules. Before I can convert them to using struct pid instead of pid_t I need to export the appropriate symbols so they can continue to be built. Signed-off-by: Eric W. Biederman Signed-off-by: Andrew Morton --- kernel/pid.c | 3 +++ 1 file changed, 3 insertions(+) diff -puN kernel/pid.c~pid-export-the-symbols-needed-to-use-struct-pid kernel/pid.c --- a/kernel/pid.c~pid-export-the-symbols-needed-to-use-struct-pid +++ a/kernel/pid.c @@ -153,6 +153,7 @@ fastcall void put_pid(struct pid *pid) atomic_dec_and_test(&pid->count)) kmem_cache_free(pid_cachep, pid); } +EXPORT_SYMBOL_GPL(put_pid); static void delayed_put_pid(struct rcu_head *rhp) { @@ -217,6 +218,7 @@ struct pid * fastcall find_pid(int nr) } return NULL; } +EXPORT_SYMBOL_GPL(find_pid); int fastcall attach_pid(struct task_struct *task, enum pid_type type, int nr) { @@ -301,6 +303,7 @@ struct pid *find_get_pid(pid_t nr) return pid; } +EXPORT_SYMBOL_GPL(find_get_pid); /* * The pid hash table is scaled according to the amount of memory in the _