linux-kernel - [PATCH] kernel/cred.c: make init

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Message-Id: <20191009082953.8864-1-linux@rasmusvillemoes.dk>
Date:   Wed,  9 Oct 2019 10:29:52 +0200
From:   Rasmus Villemoes <linux@...musvillemoes.dk>
To:     James Morris <jamorris@...ux.microsoft.com>,
        Paul Moore <paul@...l-moore.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Thomas Gleixner <tglx@...utronix.de>,
        Frederic Weisbecker <frederic@...nel.org>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] kernel/cred.c: make init_groups static

init_groups is declared in both cred.h and init_task.h, but it is not
actually referenced anywhere outside of cred.c where it is defined. So
make it static and remove the declarations.

Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
---
 include/linux/cred.h      | 1 -
 include/linux/init_task.h | 1 -
 kernel/cred.c             | 2 +-
 3 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/include/linux/cred.h b/include/linux/cred.h
index 18639c069263..4f4af62fe8f9 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -53,7 +53,6 @@ do {							\
 		groups_free(group_info);		\
 } while (0)
 
-extern struct group_info init_groups;
 #ifdef CONFIG_MULTIUSER
 extern struct group_info *groups_alloc(int);
 extern void groups_free(struct group_info *);
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 2c620d7ac432..6a046030ffad 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -25,7 +25,6 @@
 extern struct files_struct init_files;
 extern struct fs_struct init_fs;
 extern struct nsproxy init_nsproxy;
-extern struct group_info init_groups;
 extern struct cred init_cred;
 
 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
diff --git a/kernel/cred.c b/kernel/cred.c
index c0a4c12d38b2..87983c9f82e9 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -33,7 +33,7 @@ do {									\
 static struct kmem_cache *cred_jar;
 
 /* init to 2 - one for init_task, one to ensure it is never freed */
-struct group_info init_groups = { .usage = ATOMIC_INIT(2) };
+static struct group_info init_groups = { .usage = ATOMIC_INIT(2) };
 
 /*
  * The initial credentials for the initial task
-- 
2.20.1