From: Thomas Gleixner <tglx@kernel.org>
To: Yunhui Cui <cuiyunhui@bytedance.com>,
pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu,
alex@ghiti.fr, dennis@kernel.org, tj@kernel.org, cl@gentwo.org,
ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
martin.lau@linux.dev, eddyz87@gmail.com, memxor@gmail.com,
song@kernel.org, yonghong.song@linux.dev, jolsa@kernel.org,
bjorn@kernel.org, pulehui@huawei.com, puranjay@kernel.org,
thuth@redhat.com, ajones@ventanamicro.com,
ben.dooks@codethink.co.uk, rkrcmar@ventanamicro.com,
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linux-arch@vger.kernel.org, llvm@lists.linux.dev
Subject: Re: [PATCH v8 3/3] riscv: store percpu offset into thread_info
Date: Fri, 03 Jul 2026 23:02:28 +0200 [thread overview]
Message-ID: <87bjcnlrbv.ffs@fw13> (raw)
In-Reply-To: <20260703122832.15984-4-cuiyunhui@bytedance.com>
On Fri, Jul 03 2026 at 20:28, Yunhui Cui wrote:
> +
> extern struct task_struct *__switch_to(struct task_struct *,
> struct task_struct *);
>
> @@ -122,6 +129,7 @@ do { \
> if (switch_to_should_flush_icache(__next)) \
> local_flush_icache_all(); \
> __switch_to_envcfg(__next); \
> + __switch_to_pcpu_offset(__next); \
Why do you want to go through the indirection of current:
> +static inline void __switch_to_pcpu_offset(struct task_struct *next)
> +{
> +#ifdef CONFIG_SMP
> + next->thread_info.pcpu_offset = __my_cpu_offset;
> +#endif
> +}
instead of using __prev->.....offset, which is right there available?
prev parent reply other threads:[~2026-07-03 21:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-03 12:28 [PATCH v8 0/3] riscv: fix PIO helpers and add optimized percpu ops Yunhui Cui
2026-07-03 12:28 ` [PATCH v8 1/3] riscv: io: avoid null-pointer arithmetic in PIO helpers Yunhui Cui
2026-07-03 12:28 ` [PATCH v8 2/3] riscv: introduce percpu.h into include/asm Yunhui Cui
2026-07-03 12:28 ` [PATCH v8 3/3] riscv: store percpu offset into thread_info Yunhui Cui
2026-07-03 21:02 ` Thomas Gleixner [this message]
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