+ lib-vsprintf-declare-no_hash_pointers-in-sprintfh.patch added to mm-nonmm-unstable branch

+ lib-vsprintf-declare-no_hash_pointers-in-sprintfh.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: lib/vsprintf: declare no_hash_pointers in sprintf.h
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     lib-vsprintf-declare-no_hash_pointers-in-sprintfh.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-vsprintf-declare-no_hash_pointers-in-sprintfh.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: lib/vsprintf: declare no_hash_pointers in sprintf.h
Date: Mon, 14 Aug 2023 19:33:44 +0300

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 sprintf.h.  With this, add a comment to
discourage its use if no real need.

Link: https://lkml.kernel.org/r/20230814163344.17429-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/sprintf.h |    2 ++
 lib/test_printf.c       |    2 --
 mm/kfence/report.c      |    3 +--
 3 files changed, 3 insertions(+), 4 deletions(-)

--- a/include/linux/sprintf.h~lib-vsprintf-declare-no_hash_pointers-in-sprintfh
+++ a/include/linux/sprintf.h
@@ -20,6 +20,8 @@ __printf(2, 0) const char *kvasprintf_co
 __scanf(2, 3) int sscanf(const char *, const char *, ...);
 __scanf(2, 0) int vsscanf(const char *, const char *, va_list);
 
+/* These are for specific cases, do not use without real need */
+extern bool no_hash_pointers;
 int no_hash_pointers_enable(char *str);
 
 #endif	/* _LINUX_KERNEL_SPRINTF_H */
--- a/lib/test_printf.c~lib-vsprintf-declare-no_hash_pointers-in-sprintfh
+++ a/lib/test_printf.c
@@ -42,8 +42,6 @@ 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)
--- a/mm/kfence/report.c~lib-vsprintf-declare-no_hash_pointers-in-sprintfh
+++ a/mm/kfence/report.c
@@ -13,6 +13,7 @@
 #include <linux/printk.h>
 #include <linux/sched/debug.h>
 #include <linux/seq_file.h>
+#include <linux/sprintf.h>
 #include <linux/stacktrace.h>
 #include <linux/string.h>
 #include <trace/events/error_report.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, ...)
_

Patches currently in -mm which might be from andriy.shevchenko@linux.intel.com are

lib-vsprintf-split-out-sprintf-and-friends.patch
lib-vsprintf-declare-no_hash_pointers-in-sprintfh.patch