linux-next: manual merge of the rcu tree with the rdma tree

linux-next: manual merge of the rcu tree with the rdma tree

[Stephen Rothwell]

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Hi all,

FIXME: Add owner of second tree to To:
       Add author(s)/SOB of conflicting commits.

Today's linux-next merge of the rcu tree got a conflict in:

  drivers/infiniband/sw/rxe/rxe_mr.c

between commit:

  5bf944f24129 ("RDMA/rxe: Add error messages")

from the rdma tree and commit:

  330f72b82ab0 ("RDMA/rxe: Rename kfree_rcu() to kvfree_rcu_mightsleep()")

from the rcu tree.

I fixed it up (the code modified by the latter was moved by the former,
so I used this files from the former and applied the following merge fix
patch) and can carry the fix as necessary. This is now fixed as far as
linux-next is concerned, but any non trivial conflicts should be mentioned
to your upstream maintainer when your tree is submitted for merging.
You may also want to consider cooperating with the maintainer of the
conflicting tree to minimise any particularly complex conflicts.

From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Tue, 28 Mar 2023 12:12:24 +1100
Subject: [PATCH] fixup for "RDMA/rxe: Add error messages"

interacting with "RDMA/rxe: Rename kfree_rcu() to kvfree_rcu_mightsleep()"

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
 drivers/infiniband/sw/rxe/rxe_verbs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index 84b53c070fc5..bbdfbff5c752 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -1341,7 +1341,7 @@ static int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
 	if (cleanup_err)
 		rxe_err_mr(mr, "cleanup failed, err = %d", cleanup_err);
 
-	kfree_rcu(mr);
+	kfree(mr);
 	return 0;
 
 err_out:
-- 
2.39.2

-- 
Cheers,
Stephen Rothwell

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Re: linux-next: manual merge of the rcu tree with the rdma tree

[Bob Pearson]

On 3/27/23 20:16, Stephen Rothwell wrote:
> Hi all,
> 
> FIXME: Add owner of second tree to To:
>        Add author(s)/SOB of conflicting commits.
> 
> Today's linux-next merge of the rcu tree got a conflict in:
> 
>   drivers/infiniband/sw/rxe/rxe_mr.c
> 
> between commit:
> 
>   5bf944f24129 ("RDMA/rxe: Add error messages")
> 
> from the rdma tree and commit:
> 
>   330f72b82ab0 ("RDMA/rxe: Rename kfree_rcu() to kvfree_rcu_mightsleep()")
> 
> from the rcu tree.
> 
> I fixed it up (the code modified by the latter was moved by the former,
> so I used this files from the former and applied the following merge fix
> patch) and can carry the fix as necessary. This is now fixed as far as
> linux-next is concerned, but any non trivial conflicts should be mentioned
> to your upstream maintainer when your tree is submitted for merging.
> You may also want to consider cooperating with the maintainer of the
> conflicting tree to minimise any particularly complex conflicts.
> 
> From: Stephen Rothwell <sfr@canb.auug.org.au>
> Date: Tue, 28 Mar 2023 12:12:24 +1100
> Subject: [PATCH] fixup for "RDMA/rxe: Add error messages"
> 
> interacting with "RDMA/rxe: Rename kfree_rcu() to kvfree_rcu_mightsleep()"
> 
> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
> ---
>  drivers/infiniband/sw/rxe/rxe_verbs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
> index 84b53c070fc5..bbdfbff5c752 100644
> --- a/drivers/infiniband/sw/rxe/rxe_verbs.c
> +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
> @@ -1341,7 +1341,7 @@ static int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
>  	if (cleanup_err)
>  		rxe_err_mr(mr, "cleanup failed, err = %d", cleanup_err);
>  
> -	kfree_rcu(mr);
> +	kfree(mr);
>  	return 0;
>  
>  err_out:

Thanks, I thought we had already done this. If not then we should. This is the correct fix
for that rcu mightsleep business.

Reviewed-by: Bob Pearson <rpearsonhpe@gmail.com>

Re: linux-next: manual merge of the rcu tree with the rdma tree

[Joel Fernandes]

On Tue, Mar 28, 2023 at 12:38 PM Bob Pearson <rpearsonhpe@gmail.com> wrote:
>
> On 3/27/23 20:16, Stephen Rothwell wrote:
> > Hi all,
> >
> > FIXME: Add owner of second tree to To:
> >        Add author(s)/SOB of conflicting commits.
> >
> > Today's linux-next merge of the rcu tree got a conflict in:
> >
> >   drivers/infiniband/sw/rxe/rxe_mr.c
> >
> > between commit:
> >
> >   5bf944f24129 ("RDMA/rxe: Add error messages")
> >
> > from the rdma tree and commit:
> >
> >   330f72b82ab0 ("RDMA/rxe: Rename kfree_rcu() to kvfree_rcu_mightsleep()")
> >
> > from the rcu tree.
> >
> > I fixed it up (the code modified by the latter was moved by the former,
> > so I used this files from the former and applied the following merge fix
> > patch) and can carry the fix as necessary. This is now fixed as far as
> > linux-next is concerned, but any non trivial conflicts should be mentioned
> > to your upstream maintainer when your tree is submitted for merging.
> > You may also want to consider cooperating with the maintainer of the
> > conflicting tree to minimise any particularly complex conflicts.
> >
> > From: Stephen Rothwell <sfr@canb.auug.org.au>
> > Date: Tue, 28 Mar 2023 12:12:24 +1100
> > Subject: [PATCH] fixup for "RDMA/rxe: Add error messages"
> >
> > interacting with "RDMA/rxe: Rename kfree_rcu() to kvfree_rcu_mightsleep()"
> >
> > Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
> > ---
> >  drivers/infiniband/sw/rxe/rxe_verbs.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
> > index 84b53c070fc5..bbdfbff5c752 100644
> > --- a/drivers/infiniband/sw/rxe/rxe_verbs.c
> > +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
> > @@ -1341,7 +1341,7 @@ static int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
> >       if (cleanup_err)
> >               rxe_err_mr(mr, "cleanup failed, err = %d", cleanup_err);
> >
> > -     kfree_rcu(mr);
> > +     kfree(mr);
> >       return 0;
> >
> >  err_out:
>
> Thanks, I thought we had already done this. If not then we should. This is the correct fix
> for that rcu mightsleep business.
>
> Reviewed-by: Bob Pearson <rpearsonhpe@gmail.com>
>

Bob, could you please squash Jon's diff into your original patch
("RDMA/rxe: Add error messages".) before you send your pull request
for 6.4? Then I can just drop my patch.

That will be best. WDYT?

thanks,

- Joel

Re: linux-next: manual merge of the rcu tree with the rdma tree

[Stephen Rothwell]

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Hi all,

On Wed, 29 Mar 2023 15:58:20 -0400 Joel Fernandes <joel@joelfernandes.org> wrote:
>
> On Tue, Mar 28, 2023 at 12:38 PM Bob Pearson <rpearsonhpe@gmail.com> wrote:
> >
> > On 3/27/23 20:16, Stephen Rothwell wrote:  
> > >
> > > Today's linux-next merge of the rcu tree got a conflict in:
> > >
> > >   drivers/infiniband/sw/rxe/rxe_mr.c
> > >
> > > between commit:
> > >
> > >   5bf944f24129 ("RDMA/rxe: Add error messages")
> > >
> > > from the rdma tree and commit:
> > >
> > >   330f72b82ab0 ("RDMA/rxe: Rename kfree_rcu() to kvfree_rcu_mightsleep()")
> > >
> > > from the rcu tree.
> > >
> > > I fixed it up (the code modified by the latter was moved by the former,
> > > so I used this files from the former and applied the following merge fix
> > > patch) and can carry the fix as necessary. This is now fixed as far as
> > > linux-next is concerned, but any non trivial conflicts should be mentioned
> > > to your upstream maintainer when your tree is submitted for merging.
> > > You may also want to consider cooperating with the maintainer of the
> > > conflicting tree to minimise any particularly complex conflicts.
> > >
> > > From: Stephen Rothwell <sfr@canb.auug.org.au>
> > > Date: Tue, 28 Mar 2023 12:12:24 +1100
> > > Subject: [PATCH] fixup for "RDMA/rxe: Add error messages"
> > >
> > > interacting with "RDMA/rxe: Rename kfree_rcu() to kvfree_rcu_mightsleep()"
> > >
> > > Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
> > > ---
> > >  drivers/infiniband/sw/rxe/rxe_verbs.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
> > > index 84b53c070fc5..bbdfbff5c752 100644
> > > --- a/drivers/infiniband/sw/rxe/rxe_verbs.c
> > > +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
> > > @@ -1341,7 +1341,7 @@ static int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
> > >       if (cleanup_err)
> > >               rxe_err_mr(mr, "cleanup failed, err = %d", cleanup_err);
> > >
> > > -     kfree_rcu(mr);
> > > +     kfree(mr);
> > >       return 0;
> > >
> > >  err_out:  
> >
> > Thanks, I thought we had already done this. If not then we should. This is the correct fix
> > for that rcu mightsleep business.
> >
> > Reviewed-by: Bob Pearson <rpearsonhpe@gmail.com>
> >  
> 
> Bob, could you please squash Jon's diff into your original patch
> ("RDMA/rxe: Add error messages".) before you send your pull request
> for 6.4? Then I can just drop my patch.
> 
> That will be best. WDYT?
> 
> thanks,

I am still applying this fix up patch to the merge of the rcu tree ...

-- 
Cheers,
Stephen Rothwell

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