linux-kernel - [PATCH v4 12/21] modpost: unify 'sym' and 'to' in default_mismatch

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Date:   Sun, 14 May 2023 05:44:53 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Pitre <npitre@...libre.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        Masahiro Yamada <masahiroy@...nel.org>
Subject: [PATCH v4 12/21] modpost: unify 'sym' and 'to' in default_mismatch_handler()

find_better_symbol() takes 'sym' and stores the return value to
another variable 'to'.

We can use the same variable because we want to replace the original
one if possible.

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 scripts/mod/modpost.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index d2a9c655f6ea..9e81cd6803a7 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1160,11 +1160,10 @@ static bool is_executable_section(struct elf_info *elf, unsigned int secndx)
 
 static void default_mismatch_handler(const char *modname, struct elf_info *elf,
 				     const struct sectioncheck* const mismatch,
-				     Elf_Rela *r, Elf_Sym *sym,
+				     Elf_Rela *r, Elf_Sym *tsym,
 				     unsigned int fsecndx, const char *fromsec,
 				     const char *tosec)
 {
-	Elf_Sym *to;
 	Elf_Sym *from;
 	const char *tosym;
 	const char *fromsym;
@@ -1172,8 +1171,8 @@ static void default_mismatch_handler(const char *modname, struct elf_info *elf,
 	from = find_nearest_symbol(elf, r->r_offset, fsecndx);
 	fromsym = sym_name(elf, from);
 
-	to = find_better_symbol(elf, r->r_addend, sym);
-	tosym = sym_name(elf, to);
+	tsym = find_better_symbol(elf, r->r_addend, tsym);
+	tosym = sym_name(elf, tsym);
 
 	/* check whitelist - we may ignore it */
 	if (!secref_whitelist(mismatch, fromsec, fromsym, tosec, tosym))
@@ -1208,7 +1207,7 @@ static void default_mismatch_handler(const char *modname, struct elf_info *elf,
 			      "You might get more information about where this is\n"
 			      "coming from by using scripts/check_extable.sh %s\n",
 			      fromsec, (long)r->r_offset, tosec, modname);
-		else if (is_executable_section(elf, get_secindex(elf, sym)))
+		else if (is_executable_section(elf, get_secindex(elf, tsym)))
 			warn("The relocation at %s+0x%lx references\n"
 			     "section \"%s\" which is not in the list of\n"
 			     "authorized sections.  If you're adding a new section\n"
-- 
2.39.2