[dpdk-stable] [PATCH] devtools: fix check symbol change script

[Neil Horman]

On Thu, Mar 19, 2020 at 03:56:03PM +0100, David Marchand wrote:
> On Thu, Mar 19, 2020 at 3:44 PM Nithin Dabilpuram
> <ndabilpuram at marvell.com> wrote:
> >
> > Fix check symbol change script to detect new diff file when
> > it is in between  "--- /dev/null" to "b/lib/...".
> > Current awk line expects line to start with "a/..."
> > which is not always true for all diffs.
> > As a result if in_map was '1' earlier, it will not be changed
> > to '0' and we get check patch errors which are not true as the non
> > version.map files get interpreted as version map file.
> >
> > Fixes: 4bec48184e33 ("devtools: add checks for ABI symbol addition")
> > Cc: nhorman at tuxdriver.com
> > Cc: stable at dpdk.org
> 
> There was a previous attempt at fixing this that did not get a review.
> http://patchwork.dpdk.org/patch/56303/
> 
> I prefer the last submitted patch as it is simpler, but maybe I missed
> something in Bing patch.
> 
> Neil, wdyt?
> 
I'm not sure why I didn't review the previous patch you refrenced, apologies for
that.

That said, I'm not sure how this patch detects /dev/null patterns. It looks like
you still expect all lines to start with [+-] [ab]...

Neil

> 
> -- 
> David Marchand
> 
> 
> >
> > Signed-off-by: Nithin Dabilpuram <ndabilpuram at marvell.com>
> > ---
> > Note: We have two examples where checkpatch errors are because of this
> > because the version.map file change comes earlier in the diff. Because of
> > this bug, any new file change that comes after version.map file diff
> > as "/dev/null" to "b/.." gets misdetected as version.map file.
> > * http://patches.dpdk.org/patch/66878/
> > * https://patchwork.dpdk.org/patch/66900/
> >  devtools/check-symbol-change.sh | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/devtools/check-symbol-change.sh b/devtools/check-symbol-change.sh
> > index c5434f3..19ce82f 100755
> > --- a/devtools/check-symbol-change.sh
> > +++ b/devtools/check-symbol-change.sh
> > @@ -17,13 +17,13 @@ build_map_changes()
> >                 # map files are altered, and all section/symbol names
> >                 # appearing between a triggering of this rule and the
> >                 # next trigger of this rule are associated with this file
> > -               /[-+] a\/.*\.map/ {map=$2; in_map=1}
> > +               /[-+] [ab]\/.*\.map/ {map=$2; in_map=1}
> >
> >                 # Same pattern as above, only it matches on anything that
> >                 # does not end in 'map', indicating we have left the map chunk.
> >                 # When we hit this, turn off the in_map variable, which
> >                 # supresses the subordonate rules below
> > -               /[-+] a\/.*\.[^map]/ {in_map=0}
> > +               /[-+] [ab]\/.*\.[^map]/ {in_map=0}
> >
> >                 # Triggering this rule, which starts a line and ends it
> >                 # with a { identifies a versioned section.  The section name is
> > --
> > 2.8.4
> >
> 
>