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

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Date:   Wed, 19 Dec 2018 13:37:33 +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 05:34:32PM +0530, Buland Singh wrote:
> On 12/19/18 3:16 PM, Greg KH wrote:
> > 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?
> 
> Hello Greg,
> 
> The commit id is 3d035f58. The bug is there since the initial patch which
> introduced the kernel parameter 'hpet_mmap'. The fix should go to the
> stable kernel trees.

Great, can you resend it with all of this information (a fixes: and cc:
stable tag?)

thanks,

greg k-h