Re: [PATCH] riscv: Fix build with CONFIG_CC_OPTIMIZE_FOR_SIZE=y

Palmer Dabbelt
2023-02-01T07:22:16Z

On Thu, 22 Sep 2022 01:09:58 -0500, Samuel Holland wrote:
> commit 8eb060e10185 ("arch/riscv: add Zihintpause support") broke
> building with CONFIG_CC_OPTIMIZE_FOR_SIZE enabled (gcc 11.1.0):
>
> CC arch/riscv/kernel/vdso/vgettimeofday.o
> In file included from <command-line>:
> ./arch/riscv/include/asm/jump_label.h: In function 'cpu_relax':
> ././include/linux/compiler_types.h:285:33: warning: 'asm' operand 0 probably does not match constraints
> 285 | #define asm_volatile_goto(x...) asm goto(x)
> | ^~~
> ./arch/riscv/include/asm/jump_label.h:41:9: note: in expansion of macro 'asm_volatile_goto'
> 41 | asm_volatile_goto(
> | ^~~~~~~~~~~~~~~~~
> ././include/linux/compiler_types.h:285:33: error: impossible constraint in 'asm'
> 285 | #define asm_volatile_goto(x...) asm goto(x)
> | ^~~
> ./arch/riscv/include/asm/jump_label.h:41:9: note: in expansion of macro 'asm_volatile_goto'
> 41 | asm_volatile_goto(
> | ^~~~~~~~~~~~~~~~~
> make[1]: *** [scripts/Makefile.build:249: arch/riscv/kernel/vdso/vgettimeofday.o] Error 1
> make: *** [arch/riscv/Makefile:128: vdso_prepare] Error 2
>
> [...]

Applied, thanks!

[1/1] riscv: Fix build with CONFIG_CC_OPTIMIZE_FOR_SIZE=y
https://git.kernel.org/palmer/c/3c349eacc559

Best regards,
--
Palmer Dabbelt <palmer@rivosinc.com>