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checkpatch: Add warning for p0-patches

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Some people work internally with -p0-patches which has the danger that one
forgets to convert them to -p1 before mainlining.  Bitten myself and seen
p0-patches in mailing lists occasionally, this patch adds a warning to
checkpatch.pl in case a patch is -p0.  If you really want, you can fool
this check to generate false positives, this is why it just spits a
warning.  Making the check 100% proof is trickier than it looks, so let's
start with a version which catches the cases of real use.

[apw@canonical.com: update message language, handle null prefix, add tests]
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Wolfram Sang 2009-01-06 14:41:24 -08:00 committed by Linus Torvalds
parent 2a5a2c2522
commit 1e85572697
1 changed files with 7 additions and 1 deletions
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8
scripts/checkpatch.pl
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@ -1057,6 +1057,7 @@ sub process {
my $in_comment = 0;
my $comment_edge = 0;
my $first_line = 0;
my $p1_prefix = '';
my $prev_values = 'E';
@ -1205,7 +1206,12 @@ sub process {
# extract the filename as it passes
if ($line=~/^\+\+\+\s+(\S+)/) {
$realfile = $1;
$realfile =~ s@^[^/]*/@@;
$realfile =~ s@^([^/]*)/@@;
$p1_prefix = $1;
if ($tree && $p1_prefix ne '' && -e "$root/$p1_prefix") {
WARN("patch prefix '$p1_prefix' exists, appears to be a -p0 patch\n");
}
if ($realfile =~ m@^include/asm/@) {
ERROR("do not modify files in include/asm, change architecture specific files in include/asm-<architecture>\n" . "$here$rawline\n");