linux-kernel - [PATCH] fork: Fix two -Wmissing-prototypes warnings

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Date:   Tue, 13 Nov 2018 15:26:28 +0800
From:   Yi Wang <wang.yi59@....com.cn>
To:     tglx@...utronix.de
Cc:     mingo@...hat.com, bp@...en8.de, hpa@...or.com, x86@...nel.org,
        keescook@...omium.org, luto@...capital.net, wad@...omium.org,
        konrad.wilk@...cle.com, wang.yi59@....com.cn, dhowells@...hat.com,
        linux-kernel@...r.kernel.org, riel@...hat.com,
        viro@...IV.linux.org.uk, zhong.weidong@....com.cn
Subject: [PATCH] fork: Fix two -Wmissing-prototypes warnings

We get two 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.

Signed-off-by: Yi Wang <wang.yi59@....com.cn>
---
 arch/x86/include/asm/thread_info.h | 1 +
 include/linux/sched/task.h         | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h
index 2ff2a30..8621036 100644
--- a/arch/x86/include/asm/thread_info.h
+++ b/arch/x86/include/asm/thread_info.h
@@ -237,6 +237,7 @@ static inline int arch_within_stack_frames(const void * const stack,
 extern void arch_task_cache_init(void);
 extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
 extern void arch_release_task_struct(struct task_struct *tsk);
+extern void arch_release_thread_stack(unsigned long *stack);
 extern void arch_setup_new_exec(void);
 #define arch_setup_new_exec arch_setup_new_exec
 #endif	/* !__ASSEMBLY__ */
diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h
index 108ede9..44c6f15 100644
--- a/include/linux/sched/task.h
+++ b/include/linux/sched/task.h
@@ -39,6 +39,8 @@
 
 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
-- 
1.8.3.1