Re: [v3 01/10] RISC-V: Remove the current perf implementation

[Nikita Shubin]

On Wed, 22 Sep 2021 08:11:44 +0300
nikita.shubin@xxxxxxxxxxx wrote:

> Hello Atish.
>  
> 10.09.2021, 22:28, "Atish Patra" <atish.patra@xxxxxxx>:
> 
> > The current perf implementation in RISC-V is not very useful as it
> > can not count any events other than cycle/instructions. Moreover,
> > perf record can not be used or the events can not be started or
> > stopped.
> > 
> > Remove the implementation now for a better platform driver in future
> > that will implement most of the missing functionality.
> Your v3 version still breaks the build with CONFIG_BPF_SYSCALL
> enabled: 
> kernel/events/core.c: In function 'bpf_overflow_handler':
> kernel/events/core.c:9914:18: error: assignment to
> 'bpf_user_pt_regs_t *' {aka 'struct user_regs_struct *'} from
> incompatible pointer type 'struct pt_regs *'
> [-Werror=incompatible-pointer-types] 9914 |         ctx.regs =
> perf_arch_bpf_user_pt_regs(regs); |                  ^ 

Sorry for the noise.

Everything complies fine - i mistaken and applied older version again. 

> Yours,
> Nikita Shubin.
>