Messages in this thread | | | Date | Sun, 8 Jun 2008 12:41:22 +0200 | From | Sam Ravnborg <> | Subject | Re: [PATCH] Speed up "make headers_*" |
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On Sun, Jun 08, 2008 at 12:12:35PM +0200, Vegard Nossum wrote: > On Sun, Jun 8, 2008 at 11:47 AM, Sam Ravnborg <sam@ravnborg.org> wrote: > > This is just a heads up patch if anyone is interested. > > I finally took the time needed to optimize the > > make headers_* targets. > > > > On my box it now takes less than 10 seconds to run > > the full install + check cycle. > > And it generates roughtly one screen full of output. > > > > Compare that to ~31 seconds and output filling up > > my scroll back buffer. > > Nice :-) > > > Comments (especially to the perl scripts) are welcome. > > Will do! Some of my comments are a bit on the pedantic side, so you > choose yourself which ones you want to heed!
Thnaks!
headers_install.pl looks like this now. I am not happy about the way I call unifdef - can it be done better? No error handling and I like to avid the extra tmp file.
Sam
#!/usr/bin/perl # # headers_install prepare the listed header files for use in # user space and copy the files to their destination. # # Usage: headers_install.pl odir installdir [files...] # odir: dir to open files # install: dir to install the files # files: list of files to check # # Step in preparation for users space: # 1) Drop all use of compiler.h definitions # 2) Drop include of compiler.h # 3) Drop all sections defined out by __KERNEL__
use strict; use warnings;
my ($odir, $installdir, @files) = @ARGV;
my $ret = 0;
foreach my $file (@files) { open(my $infile, '<', "$odir/$file") or die "$odir/$file: $!\n"; open(my $outfile, '>', "$installdir/$file.tmp") or die "$installdir/$file.tmp: $!\n"; while (my $line = <$infile>) { $line =~ s/([\s(])__user\s/$1/g; $line =~ s/([\s(])__force\s/$1/g; $line =~ s/([\s(])__iomem\s/$1/g; $line =~ s/\s__attribute_const__\s/ /g; $line =~ s/\s__attribute_const__$//g; $line =~ s/^#include <linux\/compiler.h>//; printf $outfile "%s", $line; } close($outfile); close($outfile); system "scripts/unifdef -U__KERNEL__ $installdir/$file.tmp > $installdir/$file" }
exit $ret;
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