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fork: fix some -Wmissing-prototypes warnings 

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.cn
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>
This commit is contained in:
Yi Wang 2019-01-03 15:28:03 -08:00 committed by Linus Torvalds
parent 306790f75a
commit fb5bf31722
3 changed files with 2 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/sched/task.h
View File

@ -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

1
init/main.c
View File

@ -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);
/*

5
kernel/fork.c
View File

@ -164,10 +164,6 @@ 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
/*
@ -422,7 +418,6 @@ 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