linux-kernel - Re: [PATCH] hpet: Fix missing '=' character in the __setup() code of hpet_mmap

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Message-ID: <20181219094627.GC11441@kroah.com>
Date:   Wed, 19 Dec 2018 10:46:27 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Buland Singh <bsingh@...hat.com>
Cc:     clemens@...isch.de, arnd@...db.de, linux-kernel@...r.kernel.org,
        trivial@...nel.org, prarit@...hat.com
Subject: Re: [PATCH] hpet: Fix missing '=' character in the __setup() code of
 hpet_mmap_enable.

On Wed, Dec 19, 2018 at 02:55:02PM +0530, Buland Singh wrote:
> The kernel command parameter 'hpet_mmap' never takes effect due to missing
> '=' character in the __setup() code of hpet_mmap_enable and the memory map
> of the HPET registers never get expose to userspace.
> 
> Signed-off-by: Buland Singh <bsingh@...hat.com>
> ---
>  drivers/char/hpet.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
> index 4a22b4b41aef..9bffcd37cc7b 100644
> --- a/drivers/char/hpet.c
> +++ b/drivers/char/hpet.c
> @@ -377,7 +377,7 @@ static __init int hpet_mmap_enable(char *str)
>  	pr_info("HPET mmap %s\n", hpet_mmap_enabled ? "enabled" : "disabled");
>  	return 1;
>  }
> -__setup("hpet_mmap", hpet_mmap_enable);
> +__setup("hpet_mmap=", hpet_mmap_enable);

What commit caused this bug?  Should this go to the stable kernel trees?

thanks,

greg k-h