linux-kernel - Re: [PATCH 1/2] pci: host: pci-hyperv: Replace GFP_ATOMIC with GFP_KERNEL in hv_pci

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Date:   Mon, 19 Mar 2018 13:29:20 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Jia-Ju Bai <baijiaju1990@...il.com>
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        bhelgaas@...gle.com, devel@...uxdriverproject.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 1/2] pci: host: pci-hyperv: Replace GFP_ATOMIC with
 GFP_KERNEL in hv_pci_onchannelcallback

Smatch tracks information about every function call.  When a function
pointer is called it maybe looks something like this:

     kernel/module.c |   SYSC_delete_module | (struct module)->exit |    INTERNAL |  -1 |  | void(*)()

So then we just have to know what functions are assigned to
module->exit.

I also filter based on the function signature "void(*)()" because
there are a couple places where we cut and pasted so the structs can
have the same name and function pointer name as a member but take
different arguments.

regards,
dan carpenter