"git reset --hard" on riscv for-linux-next branch

"git reset --hard" on riscv for-linux-next branch

[Palmer Dabbelt]

Is it OK to rewrite history on my for-linux-next branch?  Since we got upstream 
I've started getting patches from various people and as a result I now have a 
bunch of branches with independent commits on them.  In an ideal world I'd like to 
do something like

  git checkout for-linux-next
  git reset --hard torvalds/master # or maybe the latest tag?
  for branch in $(list-staging-branches-for-linux-next)
  do
    git merge $branch
  done
  git push --force palmer for-linux-next

Is that an OK thing to do regularly in the branch I give to you?  I can find a 
bunch of information on how to use linux-next, but not for people in it.

Re: "git reset --hard" on riscv for-linux-next branch

[Stephen Rothwell]

Hi Palmer,

[Sorry for the slow reply]

On Wed, 22 Nov 2017 11:01:57 -0800 (PST) Palmer Dabbelt <palmer@sifive.com> wrote:
>
> Is it OK to rewrite history on my for-linux-next branch?  Since we got upstream 
> I've started getting patches from various people and as a result I now have a 
> bunch of branches with independent commits on them.  In an ideal world I'd like to 
> do something like
> 
>   git checkout for-linux-next
>   git reset --hard torvalds/master # or maybe the latest tag?

Resetting to a tag is preferred.  Though once you choose a tag (-rc1 or
-rc2 maybe) its nice to stick to it.  If some commits are based on
later places in Linus' tree, they will bring the necessary commits with
them.

>   for branch in $(list-staging-branches-for-linux-next)
>   do
>     git merge $branch
>   done
>   git push --force palmer for-linux-next
> 
> Is that an OK thing to do regularly in the branch I give to you?  I can find a 
> bunch of information on how to use linux-next, but not for people in it.

Seems fine, a few other linux-next included branches are managed just
like that.  Alternatively, if the branches you are merging never rebase
(and they really shouldn't in most cases), you could just remerge the
ones that change every now and then (rather than stating from
scratch).  This may mean that you need to tidy up your tree a week or
so before sending it to Linus, but it will give your developers
something a bit more stable to work with.

Either works for me.
-- 
Cheers,
Stephen Rothwell