[PATCH] riscv: Fix build errors using binutils2.37 toolchains

[Palmer Dabbelt]

On Thu, 24 Aug 2023 12:25:36 PDT (-0700), Conor Dooley wrote:
> On Fri, Aug 25, 2023 at 03:08:52AM +0800, Mingzheng Xing wrote:
>> When building the kernel with binutils 2.37 and GCC-11.1.0/GCC-11.2.0,
>> the following error occurs:
>> 
>>   Assembler messages:
>>   Error: cannot find default versions of the ISA extension `zicsr'
>>   Error: cannot find default versions of the ISA extension `zifencei'
>> 
>> The above error originated from this commit of binutils[0], which has been
>> resolved and backported by GCC-12.1.0[1] and GCC-11.3.0[2].
>> 
>> So fix this by change the GCC version in
>> CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC to GCC-11.3.0.
>> 
>> Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=f0bae2552db1dd4f1995608fbf6648fcee4e9e0c [0]
>> Link: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=ca2bbb88f999f4d3cc40e89bc1aba712505dd598 [1]
>> Link: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=d29f5d6ab513c52fd872f532c492e35ae9fd6671 [2]
>> Fixes: ca09f772ccca ("riscv: Handle zicsr/zifencei issue between gcc and binutils")
>> Reported-by: Conor Dooley <conor.dooley at microchip.com>
>
> Closes: https://lore.kernel.org/all/20230823-captive-abdomen-befd942a4a73@wendy/
> Reviewed-by: Conor Dooley <conor.dooley at microchip.com>
> Tested-by: Conor Dooley <conor.dooley at microchip.com>

Thanks.  I queued this up into staging, it's building -- so is Linus' 
master, so it might take a bit to get through everything.