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From: Linus Walleij <>
To: Kent Gibson <>
Cc: "" <>,
	"open list:GPIO SUBSYSTEM" <>,
	Bartosz Golaszewski <>,
	kernel test robot <>
Subject: Re: [PATCH] gpiolib: cdev: fix frame size warning in gpio_ioctl()
Date: Sun, 27 Dec 2020 22:37:09 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Sun, Dec 27, 2020 at 5:11 PM Kent Gibson <> wrote:

> The kernel test robot reports the following warning in [1]:
>  drivers/gpio/gpiolib-cdev.c: In function 'gpio_ioctl':
>  >>drivers/gpio/gpiolib-cdev.c:1437:1: warning: the frame size of 1040 bytes is larger than 1024 bytes [-Wframe-larger-than=]
> Refactor gpio_ioctl() to handle each ioctl in its own helper function
> and so reduce the variables stored on the stack to those explicitly
> required to service the ioctl at hand.
> The lineinfo_get_v1() helper handles both the GPIO_GET_LINEINFO_IOCTL
> and GPIO_GET_LINEINFO_WATCH_IOCTL, as per the corresponding v2
> implementation - lineinfo_get().
> [1]
> Fixes: aad955842d1c ("gpiolib: cdev: support GPIO_V2_GET_LINEINFO_IOCTL and GPIO_V2_GET_LINEINFO_WATCH_IOCTL")
> Reported-by: kernel test robot <>
> Signed-off-by: Kent Gibson <>

That's an interesting regression.
Anyway the kernel look better after than before the patch, so
Reviewed-by: Linus Walleij <>

Bartosz will pick patches for Torvalds this kernel cycle.

Linus Walleij

  reply	other threads:[~2020-12-27 21:38 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-27 16:10 [PATCH] gpiolib: cdev: fix frame size warning in gpio_ioctl() Kent Gibson
2020-12-27 21:37 ` Linus Walleij [this message]
2021-01-03 15:34   ` Bartosz Golaszewski

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