linux-kernel - [PATCH v1 1/4] lib/vsprintf: Declare no_hash

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Date:   Fri,  4 Aug 2023 11:26:16 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Marco Elver <elver@...gle.com>, linux-kernel@...r.kernel.org,
        kasan-dev@...glegroups.com, linux-mm@...ck.org
Cc:     Petr Mladek <pmladek@...e.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH v1 1/4] lib/vsprintf: Declare no_hash_pointers in a local header

Sparse is not happy to see non-static variable without declaration:
lib/vsprintf.c:61:6: warning: symbol 'no_hash_pointers' was not declared. Should it be static?

Declare respective variable in the local header.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 lib/test_printf.c  | 4 ++--
 lib/vsprintf.c     | 1 +
 lib/vsprintf.h     | 7 +++++++
 mm/kfence/report.c | 3 +--
 4 files changed, 11 insertions(+), 4 deletions(-)
 create mode 100644 lib/vsprintf.h

diff --git a/lib/test_printf.c b/lib/test_printf.c
index 7677ebccf3c3..9e04b5f7244a 100644
--- a/lib/test_printf.c
+++ b/lib/test_printf.c
@@ -24,6 +24,8 @@
 
 #include <linux/property.h>
 
+#include "vsprintf.h"
+
 #include "../tools/testing/selftests/kselftest_module.h"
 
 #define BUF_SIZE 256
@@ -41,8 +43,6 @@ KSTM_MODULE_GLOBALS();
 static char *test_buffer __initdata;
 static char *alloced_buffer __initdata;
 
-extern bool no_hash_pointers;
-
 static int __printf(4, 0) __init
 do_test(int bufsize, const char *expect, int elen,
 	const char *fmt, va_list ap)
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 40f560959b16..6774cf84e623 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -54,6 +54,7 @@
 
 #include <linux/string_helpers.h>
 #include "kstrtox.h"
+#include "vsprintf.h"
 
 /* Disable pointer hashing if requested */
 bool no_hash_pointers __ro_after_init;
diff --git a/lib/vsprintf.h b/lib/vsprintf.h
new file mode 100644
index 000000000000..ddffde905824
--- /dev/null
+++ b/lib/vsprintf.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LIB_VSPRINTF_H
+#define _LIB_VSPRINTF_H
+
+extern bool no_hash_pointers;
+
+#endif
diff --git a/mm/kfence/report.c b/mm/kfence/report.c
index 197430a5be4a..fb28c6abd58e 100644
--- a/mm/kfence/report.c
+++ b/mm/kfence/report.c
@@ -19,6 +19,7 @@
 
 #include <asm/kfence.h>
 
+#include "../../lib/vsprintf.h"
 #include "kfence.h"
 
 /* May be overridden by <asm/kfence.h>. */
@@ -26,8 +27,6 @@
 #define ARCH_FUNC_PREFIX ""
 #endif
 
-extern bool no_hash_pointers;
-
 /* Helper function to either print to a seq_file or to console. */
 __printf(2, 3)
 static void seq_con_printf(struct seq_file *seq, const char *fmt, ...)
-- 
2.40.0.1.gaa8946217a0b