linux-kernel - [PATCH v4 14/21] modpost: remove is_shndx_special() check from section

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Message-Id: <20230513204502.1593923-15-masahiroy@kernel.org>
Date:   Sun, 14 May 2023 05:44:55 +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 14/21] modpost: remove is_shndx_special() check from section_rel(a)

This check is unneeded. Without it, sec_name() will returns the null
string "", then section_mismatch() will return immediately.

Anyway, special section indices do not appear quite often in these
loops.

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

 scripts/mod/modpost.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 43ce35377f6a..1c5dd81c0987 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1347,7 +1347,6 @@ static int addend_mips_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
 static void section_rela(const char *modname, struct elf_info *elf,
 			 Elf_Shdr *sechdr)
 {
-	Elf_Sym  *sym;
 	Elf_Rela *rela;
 	Elf_Rela r;
 	unsigned int r_sym;
@@ -1390,11 +1389,8 @@ static void section_rela(const char *modname, struct elf_info *elf,
 				continue;
 			break;
 		}
-		sym = elf->symtab_start + r_sym;
-		/* Skip special sections */
-		if (is_shndx_special(sym->st_shndx))
-			continue;
-		check_section_mismatch(modname, elf, sym,
+
+		check_section_mismatch(modname, elf, elf->symtab_start + r_sym,
 				       fsecndx, fromsec, r.r_offset, r.r_addend);
 	}
 }
@@ -1402,7 +1398,6 @@ static void section_rela(const char *modname, struct elf_info *elf,
 static void section_rel(const char *modname, struct elf_info *elf,
 			Elf_Shdr *sechdr)
 {
-	Elf_Sym *sym;
 	Elf_Rel *rel;
 	Elf_Rela r;
 	unsigned int r_sym;
@@ -1449,11 +1444,8 @@ static void section_rel(const char *modname, struct elf_info *elf,
 		default:
 			fatal("Please add code to calculate addend for this architecture\n");
 		}
-		sym = elf->symtab_start + r_sym;
-		/* Skip special sections */
-		if (is_shndx_special(sym->st_shndx))
-			continue;
-		check_section_mismatch(modname, elf, sym,
+
+		check_section_mismatch(modname, elf, elf->symtab_start + r_sym,
 				       fsecndx, fromsec, r.r_offset, r.r_addend);
 	}
 }
-- 
2.39.2