linux-kernel - Re: [PATCH v8 0/8] arm64: entry: Convert to generic irq entry

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Message-ID: <aLn4LP7olb89TdbN@arm.com>
Date: Thu, 4 Sep 2025 21:35:56 +0100
From: Catalin Marinas <catalin.marinas@....com>
To: Jinjie Ruan <ruanjinjie@...wei.com>
Cc: will@...nel.org, oleg@...hat.com, sstabellini@...nel.org,
	mark.rutland@....com, ada.coupriediaz@....com, mbenes@...e.cz,
	broonie@...nel.org, anshuman.khandual@....com, ryan.roberts@....com,
	chenl311@...natelecom.cn, liaochang1@...wei.com,
	kristina.martsenko@....com, leitao@...ian.org, ardb@...nel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	xen-devel@...ts.xenproject.org
Subject: Re: [PATCH v8 0/8] arm64: entry: Convert to generic irq entry

On Fri, Aug 15, 2025 at 11:06:25AM +0800, Jinjie Ruan wrote:
> Currently, x86, Riscv, Loongarch use the generic entry which makes
> maintainers' work easier and codes more elegant. So also convert arm64
> to use the generic entry infrastructure from kernel/entry/* by
> switching it to generic IRQ entry first, which will make PREEMPT_DYNAMIC
> and PREEMPT_LAZY use the generic entry common code and remove a lot of
> duplicate code.
> 
> Since commit a70e9f647f50 ("entry: Split generic entry into generic
> exception and syscall entry") split the generic entry into generic irq
> entry and generic syscall entry, it is time to convert arm64 to use
> the generic irq entry. And ARM64 will be completely converted to generic
> entry in the upcoming patch series.
> 
> The main convert steps are as follows:
> - Split generic entry into generic irq entry and generic syscall to
>   make the single patch more concentrated in switching to one thing.
> - Make arm64 easier to use irqentry_enter/exit().
> - Make arm64 closer to the PREEMPT_DYNAMIC code of generic entry.
> - Switch to generic irq entry.

I had a read through the patches and this first step looks fine to me.
If Ada or Mark don't spot any problems, I think the series is a
candidate for 6.18.

Acked-by: Catalin Marinas <catalin.marinas@....com>