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Date: Tue, 5 Oct 2010 10:13:04 +0900
From: Stephen Hemminger <shemminger@...tta.com>
To: Ævar Arnfjörð Bjarmason <avarab@...il.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Michal Marek <mmarek@...e.cz>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] namespace.pl : update file exclusion list
On Sun, 3 Oct 2010 03:29:43 +0000
Ævar Arnfjörð Bjarmason <avarab@...il.com> wrote:
> On Tue, Sep 28, 2010 at 08:44, Stephen Hemminger <shemminger@...tta.com> wrote:
> > The list of exceptions in kernel tree was out of date. Convert
> > the long list of if clauses to a hashes which is more efficient
> > and more common in perl.
> >
> > Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
> >
> > --- a/scripts/namespace.pl 2010-09-28 09:28:52.251563058 +0900
> > +++ b/scripts/namespace.pl 2010-09-28 15:13:38.092073114 +0900
> > @@ -84,6 +84,58 @@ my %ksymtab = (); # names that appear in
> > my %ref = (); # $ref{$name} exists if there is a true external reference to $name
> > my %export = (); # $export{$name} exists if there is an EXPORT_... of $name
> >
> > +my %nmexception = (
> > + 'fs/ext3/bitmap' => 1,
> > + 'fs/ext4/bitmap' => 1,
> > + 'arch/x86/lib/thunk_32' => 1,
> > + 'arch/x86/lib/cmpxchg' => 1,
> > + 'arch/x86/vdso/vdso32/note' => 1,
> > + 'lib/irq_regs' => 1,
> > + 'usr/initramfs_data' => 1,
> > + 'drivers/scsi/aic94xx/aic94xx_dump' => 1,
> > + 'drivers/scsi/libsas/sas_dump' => 1,
> > + 'lib/dec_and_lock' => 1,
> > + 'drivers/ide/ide-probe-mini' => 1,
> > + 'usr/initramfs_data' => 1,
> > + 'drivers/acpi/acpia/exdump' => 1,
> > + 'drivers/acpi/acpia/rsdump' => 1,
> > + 'drivers/acpi/acpia/nsdumpdv' => 1,
> > + 'drivers/acpi/acpia/nsdump' => 1,
> > + 'arch/ia64/sn/kernel/sn2/io' => 1,
> > + 'arch/ia64/kernel/gate-data' => 1,
> > + 'security/capability' => 1,
> > + 'fs/ntfs/sysctl' => 1,
> > + 'fs/jfs/jfs_debug' => 1,
> > +);
> > +
> > +my %nameexception = (
> > + 'mod_use_count_' => 1,
> > + '__initramfs_end' => 1,
> > + '__initramfs_start' => 1,
> > + '_einittext' => 1,
> > + '_sinittext' => 1,
> > + 'kallsyms_names' => 1,
> > + 'kallsyms_num_syms' => 1,
> > + 'kallsyms_addresses'=> 1,
> > + '__this_module' => 1,
> > + '_etext' => 1,
> > + '_edata' => 1,
> > + '_end' => 1,
> > + '__bss_start' => 1,
> > + '_text' => 1,
> > + '_stext' => 1,
> > + '__gp' => 1,
> > + 'ia64_unw_start' => 1,
> > + 'ia64_unw_end' => 1,
> > + '__init_begin' => 1,
> > + '__init_end' => 1,
> > + '__bss_stop' => 1,
> > + '__nosave_begin' => 1,
> > + '__nosave_end' => 1,
> > + 'pg0' => 1,
> > +);
> > +
> > +
> > &find(\&linux_objects, '.'); # find the objects and do_nm on them
> > &list_multiply_defined();
> > &resolve_external_references();
> > @@ -272,27 +324,9 @@ sub do_nm
> > close($nmdata);
> >
> > if ($#nmdata < 0) {
> > - if (
> > - $fullname ne "lib/brlock.o"
> > - && $fullname ne "lib/dec_and_lock.o"
> > - && $fullname ne "fs/xfs/xfs_macros.o"
> > - && $fullname ne "drivers/ide/ide-probe-mini.o"
> > - && $fullname ne "usr/initramfs_data.o"
> > - && $fullname ne "drivers/acpi/executer/exdump.o"
> > - && $fullname ne "drivers/acpi/resources/rsdump.o"
> > - && $fullname ne "drivers/acpi/namespace/nsdumpdv.o"
> > - && $fullname ne "drivers/acpi/namespace/nsdump.o"
> > - && $fullname ne "arch/ia64/sn/kernel/sn2/io.o"
> > - && $fullname ne "arch/ia64/kernel/gate-data.o"
> > - && $fullname ne "drivers/ieee1394/oui.o"
> > - && $fullname ne "security/capability.o"
> > - && $fullname ne "sound/core/wrappers.o"
> > - && $fullname ne "fs/ntfs/sysctl.o"
> > - && $fullname ne "fs/jfs/jfs_debug.o"
> > - ) {
> > - printf "No nm data for $fullname\n";
> > - }
> > - return;
> > + printf "No nm data for $fullname\n"
> > + unless $nmexception{$fullname};
> > + return;
>
>
> This would be more readable and easier to update:
>
> my @nmexception = qw(
> fs/ext3/bitmap
> fs/ext4/bitmap
> arch/x86/lib/thunk_32
> arch/x86/lib/cmpxchg
> arch/x86/vdso/vdso32/note
> lib/irq_regs
> usr/initramfs_data
> drivers/scsi/aic94xx/aic94xx_dump
> drivers/scsi/libsas/sas_dump
> lib/dec_and_lock
> drivers/ide/ide-probe-mini
> usr/initramfs_data
> drivers/acpi/acpia/exdump
> drivers/acpi/acpia/rsdump
> drivers/acpi/acpia/nsdumpdv
> drivers/acpi/acpia/nsdump
> arch/ia64/sn/kernel/sn2/io
> arch/ia64/kernel/gate-data
> security/capability
> fs/ntfs/sysctl
> fs/jfs/jfs_debug
> );
>
> my @nameexception = qw(
> mod_use_count_
> __initramfs_end
> __initramfs_start
> _einittext
> _sinittext
> kallsyms_names
> kallsyms_num_syms
> kallsyms_addresses
> __this_module
> _etext
> _edata
> _end
> __bss_start
> _text
> _stext
> __gp
> ia64_unw_start
> ia64_unw_end
> __init_begin
> __init_end
> __bss_stop
> __nosave_begin
> __nosave_end
> pg0
> );
>
> my (%nmexception, %nameexception);
> @nmexception{@...xception} = ();
> @nameexception{@...eexception} = ();
>
> Then later:
>
> print "No nm data for $fullname\n"
> unless exists $nmexception{$fullname};
>
> I.e. use print (not printf) and exists().
But the kernel developers are often not perl wizards
and like things written out.
Maybe use map to simplify?
my %nmexception = map { $_ => 1 } qw (
);
--
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