linux-kernel - [PATCH] vmlinux.lds.h: catch .bss..L* sections into BSS")

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Message-ID: <1f28df2a177cf632ac70162b345dc59711959f48.1720763318.git.christophe.leroy@csgroup.eu>
Date: Fri, 12 Jul 2024 07:51:58 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Arnd Bergmann <arnd@...db.de>,
	Alexander Lobakin <alobakin@...me>,
	Nathan Chancellor <nathan@...nel.org>,
	Kees Cook <kees@...nel.org>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>,
	linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org,
	linux-arch@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	kernel test robot <lkp@...el.com>
Subject: [PATCH] vmlinux.lds.h: catch .bss..L* sections into BSS")

Commit 9a427556fb8e ("vmlinux.lds.h: catch compound literals into
data and BSS") added catches for .data..L* and .rodata..L* but missed
.bss..L*

Since commit 5431fdd2c181 ("ptrace: Convert ptrace_attach() to use
lock guards") the following appears at build:

  LD      .tmp_vmlinux.kallsyms1
powerpc64-linux-ld: warning: orphan section `.bss..Lubsan_data33' from `kernel/ptrace.o' being placed in section `.bss..Lubsan_data33'
  NM      .tmp_vmlinux.kallsyms1.syms
  KSYMS   .tmp_vmlinux.kallsyms1.S
  AS      .tmp_vmlinux.kallsyms1.S
  LD      .tmp_vmlinux.kallsyms2
powerpc64-linux-ld: warning: orphan section `.bss..Lubsan_data33' from `kernel/ptrace.o' being placed in section `.bss..Lubsan_data33'
  NM      .tmp_vmlinux.kallsyms2.syms
  KSYMS   .tmp_vmlinux.kallsyms2.S
  AS      .tmp_vmlinux.kallsyms2.S
  LD      vmlinux
powerpc64-linux-ld: warning: orphan section `.bss..Lubsan_data33' from `kernel/ptrace.o' being placed in section `.bss..Lubsan_data33'

Lets add .bss..L* to BSS_MAIN macro to catch those sections into BSS.

Fixes: 9a427556fb8e ("vmlinux.lds.h: catch compound literals into data and BSS")
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202404031349.nmKhyuUG-lkp@intel.com/
---
 include/asm-generic/vmlinux.lds.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 5703526d6ebf..70bf1004076b 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -103,7 +103,7 @@
 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L*
 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L*
-#define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..compoundliteral*
+#define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..L* .bss..compoundliteral*
 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
 #else
 #define TEXT_MAIN .text
-- 
2.44.0