Re: [PATCH RFC 1/2] riscv: remove irqflags.h inclusion in asm/bitops.h

[Yury Norov <yury.norov@gmail.com>]

On Wed, Jun 18, 2025 at 11:43:27AM +0800, Yunhui Cui wrote:
> The arch/riscv/include/asm/bitops.h does not functionally require
> including /linux/irqflags.h. Additionally, adding
> arch/riscv/include/asm/percpu.h causes a circular inclusion:
> kernel/bounds.c
> ->include/linux/log2.h
> ->include/linux/bitops.h
> ->arch/riscv/include/asm/bitops.h
> ->include/linux/irqflags.h
> ->include/linux/find.h
> ->return val ? __ffs(val) : size;
> ->arch/riscv/include/asm/bitops.h
> 
> The compilation log is as follows:
> CC      kernel/bounds.s
> In file included from ./include/linux/bitmap.h:11,
>                from ./include/linux/cpumask.h:12,
>                from ./arch/riscv/include/asm/processor.h:55,
>                from ./arch/riscv/include/asm/thread_info.h:42,
>                from ./include/linux/thread_info.h:60,
>                from ./include/asm-generic/preempt.h:5,
>                from ./arch/riscv/include/generated/asm/preempt.h:1,
>                from ./include/linux/preempt.h:79,
>                from ./arch/riscv/include/asm/percpu.h:8,
>                from ./include/linux/irqflags.h:19,
>                from ./arch/riscv/include/asm/bitops.h:14,
>                from ./include/linux/bitops.h:68,
>                from ./include/linux/log2.h:12,
>                from kernel/bounds.c:13:
> ./include/linux/find.h: In function 'find_next_bit':
> ./include/linux/find.h:66:30: error: implicit declaration of function '__ffs' [-Wimplicit-function-declaration]
>    66 |                 return val ? __ffs(val) : size;
>       |                              ^~~~~
> 
> Signed-off-by: Yunhui Cui <cuiyunhui@bytedance.com>

Is this patch a prerequisite for #2 or it fixes build on master for
you?

If fixes broken build, I'll take it and send an -rc pull request.
Otherwise, please work with RISC-V maintainers to move them together.

Thanks,
Yury