linux-kernel - Re: [PATCH 1/4] xen: build infrastructure for generating hypercall depending symbols

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Date:	Mon, 15 Dec 2014 06:20:42 +0100
From:	Juergen Gross <jgross@...e.com>
To:	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	xen-devel@...ts.xensource.com, konrad.wilk@...cle.com,
	david.vrabel@...rix.com, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com, mmarek@...e.cz, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH 1/4] xen: build infrastructure for generating hypercall
 depending symbols

On 12/12/2014 11:48 PM, Boris Ostrovsky wrote:
> On 12/11/2014 01:04 PM, Juergen Gross wrote:
>> diff --git a/scripts/xen-hypercalls.sh b/scripts/xen-hypercalls.sh
>> new file mode 100644
>> index 0000000..e6447b7
>> --- /dev/null
>> +++ b/scripts/xen-hypercalls.sh
>> @@ -0,0 +1,11 @@
>> +#!/bin/sh
>> +out="$1"
>> +shift
>> +in="$@"
>> +
>> +for i in $in; do
>> +    eval $CPP $LINUXINCLUDE -dD -imacros "$i" -x c /dev/null
>> +done | \
>> +awk '$1 == "#define" && $2 ~ /__HYPERVISOR_[a-z][a-z_0-9]*/ { v[$3] =
>> $2 }
>> +    END {for (i in v) if (!(v[i] in v))
>> +        print "HYPERCALL("substr(v[i], 14)")"}' | sort -u >$out
>
> Why do you 'sort -u'? Do you expect multiple definitions of the same
> hypercall?

Paranoia related to the use of wildcards for files scanned:

$(srctree)/include/xen/interface/xen*.h


Juergen
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