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Tiezhu Yang b6f29fa5f6 objtool/LoongArch: Mark special atomic instruction as INSN_BUG type 
commit 539d7344d4 upstream.

When compiling with LLVM and CONFIG_RUST is set, there exists the
following objtool warning:

  rust/compiler_builtins.o: warning: objtool: __rust__unordsf2(): unexpected end of section .text.unlikely.

objdump shows that the end of section .text.unlikely is an atomic
instruction:

  amswap.w        $zero, $ra, $zero

According to the LoongArch Reference Manual, if the amswap.w atomic
memory access instruction has the same register number as rd and rj,
the execution will trigger an Instruction Non-defined Exception, so
mark the above instruction as INSN_BUG type to fix the warning.

Cc: stable@vger.kernel.org
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-09-25 11:13:45 +02:00
..
alpha/include tools headers uapi: Sync asm-generic/mman-common.h and linux/mman.h 2019-03-28 14:31:56 -03:00
arc/include/uapi/asm tools arch uapi: Copy missing unistd.h headers for arc, hexagon and riscv 2019-05-02 16:00:20 -04:00
arm/include tools headers kvm: Sync kvm headers with the kernel sources 2019-12-02 12:54:13 -03:00
arm64 tools headers arm64: Sync arm64's cputype.h with the kernel sources 2024-10-28 12:33:50 -03:00
csky/include/uapi/asm csky: Add support for libdw 2019-05-15 16:36:46 -03:00
hexagon/include/uapi/asm tools arch: Remove uapi bitsperlong.h of hexagon and microblaze 2023-06-22 17:04:37 +02:00
loongarch/include objtool/LoongArch: Mark special atomic instruction as INSN_BUG type 2025-09-25 11:13:45 +02:00
microblaze/include/uapi/asm tools arch: Remove uapi bitsperlong.h of hexagon and microblaze 2023-06-22 17:04:37 +02:00
mips/include perf tools: Copy uapi/asm/perf_regs.h from the kernel for MIPS 2021-06-01 10:07:46 -03:00
parisc/include/uapi/asm parisc: Drop the HP-UX ENOSYM and EREMOTERELEASE error codes 2023-11-25 09:43:18 +01:00
powerpc/include selftests: vDSO: unconditionally build chacha test 2024-10-08 15:21:29 -06:00
riscv/include tools: Add riscv barrier implementation 2024-09-20 01:46:46 -07:00
s390/include selftests: vDSO: unconditionally build chacha test 2024-10-08 15:21:29 -06:00
sh/include sh: remove sh5 support 2020-06-01 14:48:52 -04:00
sparc/include tools headers UAPI: Update tools's copy of mman.h headers 2019-07-29 09:02:58 -03:00
x86 x86/rdrand: Disable RDSEED on AMD Cyan Skillfish 2025-07-17 18:37:14 +02:00
xtensa/include tools headers uapi: Sync asm-generic/mman-common.h and linux/mman.h 2019-03-28 14:31:56 -03:00