| Message ID | 1451907395-15978-2-git-send-email-mst@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, 2016-01-04 at 13:36 +0200, Michael S. Tsirkin wrote: > SMP-only barriers were missing in checkpatch.pl > > Refactor code slightly to make adding more variants easier. > > Signed-off-by: Michael S. Tsirkin <mst@redhat.com> > --- > scripts/checkpatch.pl | 9 ++++++++- > 1 file changed, 8 insertions(+), 1 deletion(-) > > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl > index 2b3c228..0245bbe 100755 > --- a/scripts/checkpatch.pl > +++ b/scripts/checkpatch.pl > @@ -5116,7 +5116,14 @@ sub process { > } > } > # check for memory barriers without a comment. > - if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) { > + > + my @barriers = ('mb', 'rmb', 'wmb', 'read_barrier_depends'); > + my @smp_barriers = ('smp_store_release', 'smp_load_acquire', 'smp_store_mb'); > + > + @smp_barriers = (@smp_barriers, map {"smp_" . $_} @barriers); I think using map, which so far checkpatch doesn't use, makes smp_barriers harder to understand and it'd be better to enumerate them. > + my $all_barriers = join('|', (@barriers, @smp_barriers)); > + > + if ($line =~ /\b($all_barriers)\(/) { It would be better to use /\b$all_barriers\s*\(/ as there's no reason for the capture and there could be a space between the function and the open parenthesis. > if (!ctx_has_comment($first_line, $linenr)) { > WARN("MEMORY_BARRIER", > "memory barrier without comment\n" . $herecurr);
On Mon, Jan 04, 2016 at 08:07:40AM -0800, Joe Perches wrote: > On Mon, 2016-01-04 at 13:36 +0200, Michael S. Tsirkin wrote: > > + my $all_barriers = join('|', (@barriers, @smp_barriers)); > > + > > + if ($line =~ /\b($all_barriers)\(/) { > > It would be better to use /\b$all_barriers\s*\(/ > as there's no reason for the capture and there > could be a space between the function and the > open parenthesis. I think you mean /\b(?:$all_barriers)\s*\(/ as 'all_barriers' will be: mb|wmb|rmb|smp_mb|smp_wmb|smp_rmb and putting that into your suggestion results in: /\bmb|wmb|rmb|smp_mb|smp_wmb|smp_rmb\s*\(/ which is clearly wrong - the \b only applies to 'mb' and the \s*\( only applies to smp_rmb.
On Mon, 2016-01-04 at 16:11 +0000, Russell King - ARM Linux wrote: > On Mon, Jan 04, 2016 at 08:07:40AM -0800, Joe Perches wrote: > > On Mon, 2016-01-04 at 13:36 +0200, Michael S. Tsirkin wrote: > > > + my $all_barriers = join('|', (@barriers, @smp_barriers)); > > > + > > > + if ($line =~ /\b($all_barriers)\(/) { > > > > It would be better to use /\b$all_barriers\s*\(/ > > as there's no reason for the capture and there > > could be a space between the function and the > > open parenthesis. > > I think you mean > > /\b(?:$all_barriers)\s*\(/ > > as 'all_barriers' will be: > > mb|wmb|rmb|smp_mb|smp_wmb|smp_rmb > > and putting that into your suggestion results in: > > /\bmb|wmb|rmb|smp_mb|smp_wmb|smp_rmb\s*\(/ > > which is clearly wrong - the \b only applies to 'mb' and the \s*\( only > applies to smp_rmb. right, thanks.
On Mon, Jan 04, 2016 at 08:07:40AM -0800, Joe Perches wrote: > On Mon, 2016-01-04 at 13:36 +0200, Michael S. Tsirkin wrote: > > SMP-only barriers were missing in checkpatch.pl > > > > Refactor code slightly to make adding more variants easier. > > > > Signed-off-by: Michael S. Tsirkin <mst@redhat.com> > > --- > > scripts/checkpatch.pl | 9 ++++++++- > > 1 file changed, 8 insertions(+), 1 deletion(-) > > > > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl > > index 2b3c228..0245bbe 100755 > > --- a/scripts/checkpatch.pl > > +++ b/scripts/checkpatch.pl > > @@ -5116,7 +5116,14 @@ sub process { > > } > > } > > # check for memory barriers without a comment. > > - if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) { > > + > > + my @barriers = ('mb', 'rmb', 'wmb', 'read_barrier_depends'); > > + my @smp_barriers = ('smp_store_release', 'smp_load_acquire', 'smp_store_mb'); > > + > > + @smp_barriers = (@smp_barriers, map {"smp_" . $_} @barriers); > > I think using map, which so far checkpatch doesn't use, > makes smp_barriers harder to understand and it'd be > better to enumerate them. Okay - I'll rewrite using foreach. > > + my $all_barriers = join('|', (@barriers, @smp_barriers)); > > + > > + if ($line =~ /\b($all_barriers)\(/) { > > It would be better to use /\b$all_barriers\s*\(/ > as there's no reason for the capture and there > could be a space between the function and the > open parenthesis. That's the way it was - space before ( will trigger other warnings. But sure, ok. > > > if (!ctx_has_comment($first_line, $linenr)) { > > WARN("MEMORY_BARRIER", > > "memory barrier without comment\n" . $herecurr);
On Mon, 2016-01-04 at 22:45 +0200, Michael S. Tsirkin wrote: > On Mon, Jan 04, 2016 at 08:07:40AM -0800, Joe Perches wrote: > > On Mon, 2016-01-04 at 13:36 +0200, Michael S. Tsirkin wrote: > > > SMP-only barriers were missing in checkpatch.pl > > > > > > Refactor code slightly to make adding more variants easier. > > > > > > Signed-off-by: Michael S. Tsirkin <mst@redhat.com> > > > --- > > > scripts/checkpatch.pl | 9 ++++++++- > > > 1 file changed, 8 insertions(+), 1 deletion(-) > > > > > > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl > > > index 2b3c228..0245bbe 100755 > > > --- a/scripts/checkpatch.pl > > > +++ b/scripts/checkpatch.pl > > > @@ -5116,7 +5116,14 @@ sub process { > > > } > > > } > > > # check for memory barriers without a comment. > > > - if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) { > > > + > > > + my @barriers = ('mb', 'rmb', 'wmb', 'read_barrier_depends'); > > > + my @smp_barriers = ('smp_store_release', 'smp_load_acquire', 'smp_store_mb'); > > > + > > > + @smp_barriers = (@smp_barriers, map {"smp_" . $_} @barriers); > > > > I think using map, which so far checkpatch doesn't use, > > makes smp_barriers harder to understand and it'd be > > better to enumerate them. > > Okay - I'll rewrite using foreach. > I think using the qr form (like 'our $Attribute' and a bunch of others) is the general style that should be used for checkpatch.
On Mon, Jan 04, 2016 at 02:15:50PM -0800, Joe Perches wrote: > On Mon, 2016-01-04 at 22:45 +0200, Michael S. Tsirkin wrote: > > On Mon, Jan 04, 2016 at 08:07:40AM -0800, Joe Perches wrote: > > > On Mon, 2016-01-04 at 13:36 +0200, Michael S. Tsirkin wrote: > > > > SMP-only barriers were missing in checkpatch.pl > > > > > > > > Refactor code slightly to make adding more variants easier. > > > > > > > > Signed-off-by: Michael S. Tsirkin <mst@redhat.com> > > > > --- > > > > scripts/checkpatch.pl | 9 ++++++++- > > > > 1 file changed, 8 insertions(+), 1 deletion(-) > > > > > > > > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl > > > > index 2b3c228..0245bbe 100755 > > > > --- a/scripts/checkpatch.pl > > > > +++ b/scripts/checkpatch.pl > > > > @@ -5116,7 +5116,14 @@ sub process { > > > > } > > > > } > > > > # check for memory barriers without a comment. > > > > - if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) { > > > > + > > > > + my @barriers = ('mb', 'rmb', 'wmb', 'read_barrier_depends'); > > > > + my @smp_barriers = ('smp_store_release', 'smp_load_acquire', 'smp_store_mb'); > > > > + > > > > + @smp_barriers = (@smp_barriers, map {"smp_" . $_} @barriers); > > > > > > I think using map, which so far checkpatch doesn't use, > > > makes smp_barriers harder to understand and it'd be > > > better to enumerate them. > > > > Okay - I'll rewrite using foreach. > > > > I think using the qr form (like 'our $Attribute' and > a bunch of others) is the general style that should > be used for checkpatch. Thanks - that's what I did in the new version (included in v3 of the arch cleanup patchset now).
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 2b3c228..0245bbe 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -5116,7 +5116,14 @@ sub process { } } # check for memory barriers without a comment. - if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) { + + my @barriers = ('mb', 'rmb', 'wmb', 'read_barrier_depends'); + my @smp_barriers = ('smp_store_release', 'smp_load_acquire', 'smp_store_mb'); + + @smp_barriers = (@smp_barriers, map {"smp_" . $_} @barriers); + my $all_barriers = join('|', (@barriers, @smp_barriers)); + + if ($line =~ /\b($all_barriers)\(/) { if (!ctx_has_comment($first_line, $linenr)) { WARN("MEMORY_BARRIER", "memory barrier without comment\n" . $herecurr);
SMP-only barriers were missing in checkpatch.pl Refactor code slightly to make adding more variants easier. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- scripts/checkpatch.pl | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)