linux-kernel - [PATCH 2/3] module: Move is_arm_mapping_symbol() to module

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Date:   Fri, 31 Mar 2023 17:15:52 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Luis Chamberlain <mcgrof@...nel.org>
Cc:     linux-modules@...r.kernel.org, linux-kernel@...r.kernel.org,
        loongson-kernel@...ts.loongnix.cn
Subject: [PATCH 2/3] module: Move is_arm_mapping_symbol() to module_symbol.h

In order to avoid duplicated code, move is_arm_mapping_symbol() to
include/linux/module_symbol.h, then remove is_arm_mapping_symbol()
in the other places.

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 include/linux/module_symbol.h | 15 +++++++++++++++
 kernel/module/kallsyms.c      | 14 +-------------
 scripts/mod/modpost.c         | 10 +---------
 3 files changed, 17 insertions(+), 22 deletions(-)
 create mode 100644 include/linux/module_symbol.h

diff --git a/include/linux/module_symbol.h b/include/linux/module_symbol.h
new file mode 100644
index 0000000..9fa4173
--- /dev/null
+++ b/include/linux/module_symbol.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _LINUX_MODULE_SYMBOL_H
+#define _LINUX_MODULE_SYMBOL_H
+
+/* This ignores the intensely annoying "mapping symbols" found in ELF files. */
+static inline int is_arm_mapping_symbol(const char *str)
+{
+	if (str[0] == '.' && str[1] == 'L')
+		return true;
+	return str[0] == '$' &&
+	       (str[1] == 'a' || str[1] == 'd' || str[1] == 't' || str[1] == 'x')
+	       && (str[2] == '\0' || str[2] == '.');
+}
+
+#endif /* _LINUX_MODULE_SYMBOL_H */
diff --git a/kernel/module/kallsyms.c b/kernel/module/kallsyms.c
index a9045fe..5de3207 100644
--- a/kernel/module/kallsyms.c
+++ b/kernel/module/kallsyms.c
@@ -6,6 +6,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/module_symbol.h>
 #include <linux/kallsyms.h>
 #include <linux/buildid.h>
 #include <linux/bsearch.h>
@@ -243,19 +244,6 @@ void init_build_id(struct module *mod, const struct load_info *info)
 }
 #endif
 
-/*
- * This ignores the intensely annoying "mapping symbols" found
- * in ARM ELF files: $a, $t and $d.
- */
-static inline int is_arm_mapping_symbol(const char *str)
-{
-	if (str[0] == '.' && str[1] == 'L')
-		return true;
-	return str[0] == '$' &&
-	       (str[1] == 'a' || str[1] == 'd' || str[1] == 't' || str[1] == 'x')
-	       && (str[2] == '\0' || str[2] == '.');
-}
-
 static const char *kallsyms_symbol_name(struct mod_kallsyms *kallsyms, unsigned int symnum)
 {
 	return kallsyms->strtab + kallsyms->symtab[symnum].st_name;
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 79a27cc..7241db8 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -22,6 +22,7 @@
 #include <errno.h>
 #include "modpost.h"
 #include "../../include/linux/license.h"
+#include "../../include/linux/module_symbol.h"
 
 /* Are we using CONFIG_MODVERSIONS? */
 static bool modversions;
@@ -1112,15 +1113,6 @@ static int secref_whitelist(const struct sectioncheck *mismatch,
 	return 1;
 }
 
-static inline int is_arm_mapping_symbol(const char *str)
-{
-	if (str[0] == '.' && str[1] == 'L')
-		return true;
-	return str[0] == '$' &&
-	       (str[1] == 'a' || str[1] == 'd' || str[1] == 't' || str[1] == 'x')
-	       && (str[2] == '\0' || str[2] == '.');
-}
-
 /*
  * If there's no name there, ignore it; likewise, ignore it if it's
  * one of the magic symbols emitted used by current ARM tools.
-- 
2.1.0