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From:   Arnd Bergmann <arnd@kernel.org>
To:     Andrew Morton <akpm@linux-foundation.org>
Cc:     linux-mm@kvack.org, Arnd Bergmann <arnd@arndb.de>,
        Russell King <linux@armlinux.org.uk>,
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Subject: [PATCH 04/14] audit: avoid missing-prototype warnings
Date:   Wed, 17 May 2023 15:10:52 +0200
Message-Id: <20230517131102.934196-5-arnd@kernel.org>
In-Reply-To: <20230517131102.934196-1-arnd@kernel.org>
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From: Arnd Bergmann <arnd@arndb.de>

Building with 'make W=1' reveals two function definitions without
a previous prototype in the audit code:

lib/compat_audit.c:32:5: error: no previous prototype for 'audit_classify_compat_syscall' [-Werror=missing-prototypes]
kernel/audit.c:1813:14: error: no previous prototype for 'audit_serial' [-Werror=missing-prototypes]

The first one needs a declaration from linux/audit.h but cannot
include that header without causing conflicting (compat) syscall number
definitions, so move the it into linux/audit_arch.h.

The second one is declared conditionally based on CONFIG_AUDITSYSCALL
but needed as a local function even when that option is disabled, so
move the declaration out of the #ifdef block.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 include/linux/audit.h      | 2 --
 include/linux/audit_arch.h | 2 ++
 kernel/audit.h             | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/audit.h b/include/linux/audit.h
index 31086a72e32a..6a3a9e122bb5 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -130,8 +130,6 @@ extern unsigned compat_dir_class[];
 extern unsigned compat_chattr_class[];
 extern unsigned compat_signal_class[];
 
-extern int audit_classify_compat_syscall(int abi, unsigned syscall);
-
 /* audit_names->type values */
 #define	AUDIT_TYPE_UNKNOWN	0	/* we don't know yet */
 #define	AUDIT_TYPE_NORMAL	1	/* a "normal" audit record */
diff --git a/include/linux/audit_arch.h b/include/linux/audit_arch.h
index 8fdb1afe251a..0e34d673ef17 100644
--- a/include/linux/audit_arch.h
+++ b/include/linux/audit_arch.h
@@ -21,4 +21,6 @@ enum auditsc_class_t {
 	AUDITSC_NVALS /* count */
 };
 
+extern int audit_classify_compat_syscall(int abi, unsigned syscall);
+
 #endif
diff --git a/kernel/audit.h b/kernel/audit.h
index c57b008b9914..94738bce40b2 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -259,8 +259,8 @@ extern struct tty_struct *audit_get_tty(void);
 extern void audit_put_tty(struct tty_struct *tty);
 
 /* audit watch/mark/tree functions */
-#ifdef CONFIG_AUDITSYSCALL
 extern unsigned int audit_serial(void);
+#ifdef CONFIG_AUDITSYSCALL
 extern int auditsc_get_stamp(struct audit_context *ctx,
 			      struct timespec64 *t, unsigned int *serial);
 
-- 
2.39.2