Re: [Qemu-devel] [PATCH v2] dump-guest-memory.py: fix "You can't do that without a process to debug"

[Fam Zheng <famz@redhat.com>]

On Tue, 12/12 18:30, Laszlo Ersek wrote:
> On 12/12/17 18:26, no-reply@patchew.org wrote:
> > Hi,
> > 
> > This series seems to have some coding style problems. See output below for
> > more information:
> > 
> > Message-id: 20171212172208.13588-1-marcandre.lureau@redhat.com
> > Subject: [Qemu-devel] [PATCH v2] dump-guest-memory.py: fix "You can't do that without a process to debug"
> > Type: series
> > 
> > === TEST SCRIPT BEGIN ===
> > #!/bin/bash
> > 
> > BASE=base
> > n=1
> > total=$(git log --oneline $BASE.. | wc -l)
> > failed=0
> > 
> > git config --local diff.renamelimit 0
> > git config --local diff.renames True
> > 
> > commits="$(git log --format=%H --reverse $BASE..)"
> > for c in $commits; do
> >     echo "Checking PATCH $n/$total: $(git log -n 1 --format=%s $c)..."
> >     if ! git show $c --format=email | ./scripts/checkpatch.pl --mailback -; then
> >         failed=1
> >         echo
> >     fi
> >     n=$((n+1))
> > done
> > 
> > exit $failed
> > === TEST SCRIPT END ===
> > 
> > Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
> > From https://github.com/patchew-project/qemu
> >  t [tag update]            patchew/20171207203036.14993-1-eblake@redhat.com -> patchew/20171207203036.14993-1-eblake@redhat.com
> >  * [new tag]               patchew/20171212172208.13588-1-marcandre.lureau@redhat.com -> patchew/20171212172208.13588-1-marcandre.lureau@redhat.com
> > Switched to a new branch 'test'
> > 7c0544b1a7 dump-guest-memory.py: fix "You can't do that without a process to debug"
> > 
> > === OUTPUT BEGIN ===
> > Checking PATCH 1/1: dump-guest-memory.py: fix "You can't do that without a process to debug"...
> > ERROR: Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt
> > #46: FILE: hw/misc/vmcoreinfo.c:39:
> > +    static VMCoreInfoState * volatile vmcoreinfo_state G_GNUC_UNUSED;
> > 
> > total: 1 errors, 0 warnings, 24 lines checked
> > 
> > Your patch has style problems, please review.  If any of these errors
> > are false positives report them to the maintainer, see
> > CHECKPATCH in MAINTAINERS.
> > 
> > === OUTPUT END ===
> > 
> > Test command exited with code: 1
> > 
> > 
> > ---
> > Email generated automatically by Patchew [http://patchew.org/].
> > Please send your feedback to patchew-devel@freelists.org
> > 
> 
> "volatile" is required in this case; otherwise GCC would be entirely
> justified to eliminate the variable.

OK, maybe we should relax it to warning instead of error for `volatile` usages,
as long as it follows a comment?

Fam