linux-kernel - [PATCH] exec: make prepare_bprm

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Date:   Mon, 10 Dec 2018 16:49:54 +0900
From:   Chanho Min <chanho.min@....com>
To:     Alexander Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        "David S. Miller" <davem@...emloft.net>,
        Michal Hocko <mhocko@...e.com>,
        Alexei Starovoitov <ast@...nel.org>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Seungho Park <seungho1.park@....com>,
        Chanho Min <chanho.min@....com>
Subject: [PATCH] exec: make prepare_bprm_creds static

prepare_bprm_creds is not used outside exec.c, so there's no reason for it
to have external linkage.

Signed-off-by: Chanho Min <chanho.min@....com>
---
 fs/exec.c               | 2 +-
 include/linux/binfmts.h | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/exec.c b/fs/exec.c
index fc281b7..b6c9e5f 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1399,7 +1399,7 @@ EXPORT_SYMBOL(finalize_exec);
  * Or, if exec fails before, free_bprm() should release ->cred and
  * and unlock.
  */
-int prepare_bprm_creds(struct linux_binprm *bprm)
+static int prepare_bprm_creds(struct linux_binprm *bprm)
 {
 	if (mutex_lock_interruptible(&current->signal->cred_guard_mutex))
 		return -ERESTARTNOINTR;
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h
index e9f5fe6..6a9e43d 100644
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -138,7 +138,6 @@ extern int transfer_args_to_stack(struct linux_binprm *bprm,
 extern int bprm_change_interp(const char *interp, struct linux_binprm *bprm);
 extern int copy_strings_kernel(int argc, const char *const *argv,
 			       struct linux_binprm *bprm);
-extern int prepare_bprm_creds(struct linux_binprm *bprm);
 extern void install_exec_creds(struct linux_binprm *bprm);
 extern void set_binfmt(struct linux_binfmt *new);
 extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t);
-- 
2.1.4