linux-kernel - Re: staging: r8188eu: how to handle nested mutex under spinlock

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Date:   Mon, 4 Apr 2022 16:16:31 +0200
From:   Michael Straube <straube.linux@...il.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     "Fabio M. De Francesco" <fmdefrancesco@...il.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        "open list:STAGING SUBSYSTEM" <linux-staging@...ts.linux.dev>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: staging: r8188eu: how to handle nested mutex under spinlock

On 4/4/22 15:33, Dan Carpenter wrote:
> On Sun, Apr 03, 2022 at 02:18:04PM +0200, Michael Straube wrote:
>> On 4/3/22 14:10, Fabio M. De Francesco wrote:
>>> For a list of all the paths to a given function you may use Smatch:
>>>
>>> ./smatch/smatch_data/db/smdb.py ips_leave
>>>
>>> or
>>>
>>> ./smatch/smatch_data/db/smdb.py call_tree ips_leave
>>>
>>> But perhaps you already know how to do it.
>>
>> Yes, but thank you anyway. :)
>>
> 
> My email (gmail account) has been so weird recently.  I don't know why
> I'm not getting Fabio's emails...  Presumably they will show up in a few
> days.
> 
> The other command to use is:
> 
> $ ./smatch/smatch_data/db/smdb.py preempt ips_leave
> rtw_set_802_11_disassociate() <- disables preempt
> -> _rtw_pwr_wakeup()
>     -> LeaveAllPowerSaveMode()
>        -> ips_leave()
> 
> I save that to a file, open it with with vim and run a vim function
> `hall` (for highlight all) from my .vimrc file.
> 
> " Use :hall to highlight all the words in a file (for debugging sleeping bugs)
> function HLall()
>    let a=[]
>    %s/\w\+/\=add(a, submatch(0))/gn
>    let @/ = join(a, "\\|")
> endfunction
> cnoreabbrev hall call HLall() <CR>:set hls<CR>
> 
> That highlights all the functions is the call tree, then I use cscope to
> jump to rtw_set_802_11_disassociate and follow the highlighted functions
> to ips_leave().

Thank you for this hint Dan. :)

thanks,
Michael