From: Yi Wang wang.yi59@zte.com.cn
[ Upstream commit fb5bf31722d0805a3f394f7d59f2e8cd07acccb7 ]
We get a warning when building kernel with W=1:
kernel/fork.c:167:13: warning: no previous prototype for `arch_release_thread_stack' [-Wmissing-prototypes] kernel/fork.c:779:13: warning: no previous prototype for `fork_init' [-Wmissing-prototypes]
Add the missing declaration in head file to fix this.
Also, remove arch_release_thread_stack() completely because no arch seems to implement it since bb9d81264 (arch: remove tile port).
Link: http://lkml.kernel.org/r/1542170087-23645-1-git-send-email-wang.yi59@zte.com... Signed-off-by: Yi Wang wang.yi59@zte.com.cn Acked-by: Michal Hocko mhocko@suse.com Acked-by: Mike Rapoport rppt@linux.ibm.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/sched/task.h | 2 ++ init/main.c | 1 - kernel/fork.c | 5 ----- 3 files changed, 2 insertions(+), 6 deletions(-)
diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h index 108ede99e5335..44c6f15800ff5 100644 --- a/include/linux/sched/task.h +++ b/include/linux/sched/task.h @@ -39,6 +39,8 @@ void __noreturn do_task_dead(void);
extern void proc_caches_init(void);
+extern void fork_init(void); + extern void release_task(struct task_struct * p);
#ifdef CONFIG_HAVE_COPY_THREAD_TLS diff --git a/init/main.c b/init/main.c index 020972fed1171..38a603f62b7bb 100644 --- a/init/main.c +++ b/init/main.c @@ -105,7 +105,6 @@ static int kernel_init(void *);
extern void init_IRQ(void); -extern void fork_init(void); extern void radix_tree_init(void);
/* diff --git a/kernel/fork.c b/kernel/fork.c index aef1430bdce0b..8cb5cd7c97e19 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -163,10 +163,6 @@ static inline void free_task_struct(struct task_struct *tsk) } #endif
-void __weak arch_release_thread_stack(unsigned long *stack) -{ -} - #ifndef CONFIG_ARCH_THREAD_STACK_ALLOCATOR
/* @@ -376,7 +372,6 @@ static void release_task_stack(struct task_struct *tsk) return; /* Better to leak the stack than to free prematurely */
account_kernel_stack(tsk, -1); - arch_release_thread_stack(tsk->stack); free_thread_stack(tsk); tsk->stack = NULL; #ifdef CONFIG_VMAP_STACK