linux-kernel - Re: Build regressions/improvements in v5.18-rc1

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Date:   Mon, 4 Apr 2022 19:26:55 +1000
From:   Dave Chinner <david@...morbit.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     linux-kernel@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
        linux-parisc@...r.kernel.org, sparclinux@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
        Mike Marciniszyn <mike.marciniszyn@...nelisnetworks.com>,
        linux-rdma@...r.kernel.org, linux-um@...ts.infradead.org,
        linux-media@...r.kernel.org, netdev@...r.kernel.org,
        linux-wireless@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-serial@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-xfs@...r.kernel.org, alsa-devel@...a-project.org,
        linux-s390@...r.kernel.org
Subject: Re: Build regressions/improvements in v5.18-rc1

On Mon, Apr 04, 2022 at 10:16:08AM +0200, Geert Uytterhoeven wrote:
> On Mon, 4 Apr 2022, Geert Uytterhoeven wrote:
> > Below is the list of build error/warning regressions/improvements in
> > v5.18-rc1[1] compared to v5.17[2].
> > 
> > Summarized:
> >  - build errors: +36/-15
> >  - build warnings: +5/-38
> > 
> > Happy fixing! ;-)

Well....

> >  + /kisskb/src/fs/xfs/xfs_buf.h: error: initializer element is not constant:  => 46:23

Looking at:

http://kisskb.ellerman.id.au/kisskb/buildresult/14714961/

The build error is:

/kisskb/src/fs/xfs/./xfs_trace.h:432:2: note: in expansion of macro 'TP_printk'
  TP_printk("dev %d:%d daddr 0x%llx bbcount 0x%x hold %d pincount %d "
  ^
/kisskb/src/fs/xfs/./xfs_trace.h:440:5: note: in expansion of macro '__print_flags'
     __print_flags(__entry->flags, "|", XFS_BUF_FLAGS),
     ^
/kisskb/src/fs/xfs/xfs_buf.h:67:4: note: in expansion of macro 'XBF_UNMAPPED'
  { XBF_UNMAPPED,  "UNMAPPED" }
    ^
/kisskb/src/fs/xfs/./xfs_trace.h:440:40: note: in expansion of macro 'XFS_BUF_FLAGS'
     __print_flags(__entry->flags, "|", XFS_BUF_FLAGS),
                                        ^
/kisskb/src/fs/xfs/./xfs_trace.h: In function 'trace_raw_output_xfs_buf_flags_class':
/kisskb/src/fs/xfs/xfs_buf.h:46:23: error: initializer element is not constant
 #define XBF_UNMAPPED  (1 << 31)/* do not map the buffer */

This doesn't make a whole lotta sense to me. It's blown up in a
tracepoint macro in XFS that was not changed at all in 5.18-rc1, nor
was any of the surrounding XFS code or contexts.  Perhaps something
outside XFS changed to cause this on these platforms?

Can you bisect this, please?

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com