[Linux-kernel-mentees] [PATCH] checkpatch: add fix for BAD_SIGN_OFF

Lukas Bulwahn lukas.bulwahn at gmail.com
Sun Nov 8 06:47:42 UTC 2020

On Sun, 8 Nov 2020, Aditya wrote:

> On 8/11/20 12:08 am, Lukas Bulwahn wrote:
> > 
> > Can you share the six commits?
> > 
> > Then we check if the fix is really the right fix of if something different
> > is wrong with these commits.
> > 
> These are the commits where this warning for BAD_SIGN_OFF was getting
> triggered(over 4.13..5.8):
> 1) Commit 1d1f898df658 ("rcu: Do RCU GP kthread self-wakeup from
> softirq and interrupt")
> 2) Commit 6e88559470f5 ("Documentation: Add section about CPU
> vulnerabilities for Spectre")
> 3) Commit a35d16905efc ("rcu: Add basic support for kfree_rcu() batching")
> 4) Commit b7e4aadef28f ("locking/spinlocks: Document the semantics of
> spin_is_locked()")
> 5) Commit 621df431b0ac ("Documentation/memory-barriers.txt:
> Cross-reference "tools/memory-model/"")
> 6) Commit 1c27b644c0fd ("Automate memory-barriers.txt; provide
> Linux-kernel memory model")

I checked all six cases and think the proposed fix is always okay.

I guess there is still the warning that Co-developed-by: should 
immediately be followed up the Signed-off-by:, right?

A possible fix for that would be to check if the needed Signed-off-by: 
follows somewhere and then just move that to the appropriate place in the 

When your patch includes this information on how many occurrences, you 
found and that all of the fixes are correct in those cases, this patch is 
ready for lkml and Joe Perches.

Joe will possibly ask to name the six commits, so he can check himself. 
But no need to add them in the commit message or so.


> > This certainly needs to be mentioned in the commit message.
> >
> Okay.
> Thanks
> Aditya
> >
> > Lukas
> >
> >

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