Re: linux-next: build failure after merge of the vfs-brauner tree

[Christian Brauner]

On Tue, Sep 10, 2024 at 10:23:32AM GMT, Stephen Rothwell wrote:
> Hi all,
> 
> On Thu, 5 Sep 2024 10:58:09 +1000 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> >
> > On Tue, 3 Sep 2024 12:41:08 +1000 Aleksa Sarai <cyphar@xxxxxxxxxx> wrote:
> > >
> > > On 2024-09-03, Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:  
> > > > Hi all,
> > > > 
> > > > After merging the vfs-brauner tree, today's linux-next build (native perf)
> > > > failed like this:
> > > > 
> > > > In file included from trace/beauty/fs_at_flags.c:21:
> > > > perf/trace/beauty/generated/fs_at_flags_array.c:10:31: error: initialized field overwritten [-Werror=override-init]
> > > >    10 |         [ilog2(0x0001) + 1] = "RENAME_NOREPLACE",
> > > >       |                               ^~~~~~~~~~~~~~~~~~
> > > > perf/trace/beauty/generated/fs_at_flags_array.c:10:31: note: (near initialization for 'fs_at_flags[1]')
> > > > perf/trace/beauty/generated/fs_at_flags_array.c:14:30: error: initialized field overwritten [-Werror=override-init]
> > > >    14 |         [ilog2(0x200) + 1] = "HANDLE_FID",
> > > >       |                              ^~~~~~~~~~~~
> > > > perf/trace/beauty/generated/fs_at_flags_array.c:14:30: note: (near initialization for 'fs_at_flags[10]')
> > > > perf/trace/beauty/generated/fs_at_flags_array.c:15:30: error: initialized field overwritten [-Werror=override-init]
> > > >    15 |         [ilog2(0x001) + 1] = "HANDLE_MNT_ID_UNIQUE",
> > > >       |                              ^~~~~~~~~~~~~~~~~~~~~~
> > > > perf/trace/beauty/generated/fs_at_flags_array.c:15:30: note: (near initialization for 'fs_at_flags[1]')
> > > > 
> > > > Caused by commit
> > > > 
> > > >   34cf40849654 ("uapi: explain how per-syscall AT_* flags should be allocated")
> > > > 
> > > > I have used the vfs-brauner tree from next-20240902 for today.    
> > > 
> > > Ah okay, the overlapping flag definitions in the copied over fcntl.h are
> > > causing issues. We could just drop that part of the patch, or (since the
> > > new flags aren't handled by perf/trace/beauty) we could just do
> > > something simple like:
> > > 
> > > diff --git a/tools/perf/trace/beauty/fs_at_flags.sh b/tools/perf/trace/beauty/fs_at_flags.sh
> > > index 456f59addf74..930384029599 100755
> > > --- a/tools/perf/trace/beauty/fs_at_flags.sh
> > > +++ b/tools/perf/trace/beauty/fs_at_flags.sh
> > > @@ -13,9 +13,13 @@ printf "static const char *fs_at_flags[] = {\n"
> > >  regex='^[[:space:]]*#[[:space:]]*define[[:space:]]+AT_([^_]+[[:alnum:]_]+)[[:space:]]+(0x[[:xdigit:]]+)[[:space:]]*.*'
> > >  # AT_EACCESS is only meaningful to faccessat, so we will special case it there...
> > >  # AT_STATX_SYNC_TYPE is not a bit, its a mask of AT_STATX_SYNC_AS_STAT, AT_STATX_FORCE_SYNC and AT_STATX_DONT_SYNC
> > > +# AT_RENAME_* flags are just aliases of RENAME_* flags and we don't need to include them.
> > > +# AT_HANDLE_* flags are only meaningful for name_to_handle_at, which we don't support.
> > >  grep -E $regex ${linux_fcntl} | \
> > >         grep -v AT_EACCESS | \
> > >         grep -v AT_STATX_SYNC_TYPE | \
> > > +       grep -Ev "AT_RENAME_(NOREPLACE|EXCHANGE|WHITEOUT)" | \
> > > +       grep -Ev "AT_HANDLE_(FID|MNT_ID_UNIQUE)" | \
> > >         sed -r "s/$regex/\2 \1/g"       | \
> > >         xargs printf "\t[ilog2(%s) + 1] = \"%s\",\n"
> > >  printf "};\n"  
> > 
> > I have applied that by hand for today.  Please submit it and get it
> > applied.
> 
> I am still applying this build fix patch.

That's weird as I removed everything that touches tools/ from that
commit as the tools/ repository is updated after uapi changes
separately. That's what I've been told multiple times. I can add this
change but it feels odd.