From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
To: Yury Norov <yury.norov@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>,
linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/2] MIPS: SGI-IP27: micro-optimize arch_init_irq()
Date: Wed, 17 Apr 2024 13:10:52 +0200 [thread overview]
Message-ID: <Zh+uPB0druail4XC@alpha.franken.de> (raw)
In-Reply-To: <20240416173711.613750-2-yury.norov@gmail.com>
On Tue, Apr 16, 2024 at 10:37:10AM -0700, Yury Norov wrote:
> The function sets adjusted groups of bits in hub_irq_map by using
> for-loops. There's a bitmap_set() function dedicated to do this.
>
> Because [0, CPU_CALL_B_IRQ] and [NI_BRDCAST_ERR_A, MSC_PANIC_INTR]
> ranges belong to the same machine word, bitmap_set() would boil down
> to an inline wrapper in both cases, avoiding generating a loop, with
> the associate overhead. Effectively, it would be a compile-time:
>
> *hub_irq_map = GENMASK() | GENMASK();
>
> Signed-off-by: Yury Norov <yury.norov@gmail.com>
> ---
> arch/mips/sgi-ip27/ip27-irq.c | 8 ++------
> 1 file changed, 2 insertions(+), 6 deletions(-)
>
> diff --git a/arch/mips/sgi-ip27/ip27-irq.c b/arch/mips/sgi-ip27/ip27-irq.c
> index 8f5299b269e7..d8acdf0439d2 100644
> --- a/arch/mips/sgi-ip27/ip27-irq.c
> +++ b/arch/mips/sgi-ip27/ip27-irq.c
> @@ -277,7 +277,6 @@ void __init arch_init_irq(void)
> {
> struct irq_domain *domain;
> struct fwnode_handle *fn;
> - int i;
I've already applied your first version, so I need an incremental
patch, which just removes the unused variable.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
next prev parent reply other threads:[~2024-04-17 11:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-16 17:37 [PATCH 0/2] MIPS: SGI-IP27: micro-optimize arch_init_irq() Yury Norov
2024-04-16 17:37 ` [PATCH v2 1/2] " Yury Norov
2024-04-17 11:10 ` Thomas Bogendoerfer [this message]
2024-04-22 23:04 ` Yury Norov
2024-05-03 12:50 ` Thomas Bogendoerfer
2024-04-16 17:37 ` [PATCH 2/2] MIPS: SGI-IP27: use WARN_ON() output Yury Norov
2024-05-03 12:50 ` Thomas Bogendoerfer
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