linux-kernel - Re: [PATCH] fs/bcachefs: Fix __wait_on_freeing

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Message-ID: <ZwZCyTx_HbPWZ8zJ@gmail.com>
Date: Wed, 9 Oct 2024 10:46:01 +0200
From: Ingo Molnar <mingo@...nel.org>
To: NeilBrown <neilb@...e.de>
Cc: Stephen Rothwell <sfr@...b.auug.org.au>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Kent Overstreet <kent.overstreet@...ux.dev>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: [PATCH] fs/bcachefs: Fix __wait_on_freeing_inode() definition of
 waitqueue entry


* NeilBrown <neilb@...e.de> wrote:

> On Wed, 09 Oct 2024, Ingo Molnar wrote:
> > * NeilBrown <neilb@...e.de> wrote:
> > 
> > > On Wed, 09 Oct 2024, Stephen Rothwell wrote:
> > > > Hi all,
> > > > 
> > > > After merging the tip tree, today's linux-next build (x86_64 allmodconfig)
> > > > failed like this:
> > > > 
> > > > In file included from include/linux/fs.h:6,
> > > >                  from include/linux/highmem.h:5,
> > > >                  from include/linux/bvec.h:10,
> > > >                  from include/linux/blk_types.h:10,
> > > >                  from include/linux/bio.h:10,
> > > >                  from fs/bcachefs/bcachefs.h:188,
> > > >                  from fs/bcachefs/fs.c:4:
> > > > fs/bcachefs/fs.c: In function '__wait_on_freeing_inode':
> > > > fs/bcachefs/fs.c:281:31: error: initialization of 'long unsigned int *' from incompatible pointer type 'u32 *' {aka 'unsigned int *'} [-Wincompatible-pointer-types]
> > > >   281 |         DEFINE_WAIT_BIT(wait, &inode->v.i_state, __I_NEW);
> > > 
> > > The fix we want is to replace that line with
> > >    struct wait_bit_queue_entry wait;
> > > I should have checked more carefully - sorry.
> > > 
> > > I guess we wait for rc3?
> > > 
> > > Kent: could you please make that change?  The inode_bit_waitqueue() does
> > > initialisation equivalent of DEFINE_WAIT_BIT() so you only need the declaration.
> > 
> > Since the breakage was introduced via tip:sched/core, I've applied the fix 
> > below.
> > 
> > Does this look good to you?
> 
> Perfect, thanks.

You are welcome!

	Ingo