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Message-ID: <2025101905-matter-freezable-39e5@gregkh>
Date: Sun, 19 Oct 2025 14:38:26 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Nathan Chancellor <nathan@...nel.org>
Cc: Eliav Farber <farbere@...zon.com>, stable@...r.kernel.org,
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Subject: Re: [PATCH v2 00/27 5.10.y] Backport minmax.h updates from v6.17-rc7
On Fri, Oct 17, 2025 at 05:09:24PM +0100, Nathan Chancellor wrote:
> On Fri, Oct 17, 2025 at 05:03:02PM +0200, Greg KH wrote:
> > On Fri, Oct 17, 2025 at 09:04:52AM +0000, Eliav Farber wrote:
> > > This series backports 27 patches to update minmax.h in the 5.10.y
> > > branch, aligning it with v6.17-rc7.
> > >
> > > The ultimate goal is to synchronize all long-term branches so that they
> > > include the full set of minmax.h changes.
> > >
> > > - 6.12.y has already been backported; the changes are included in
> > > v6.12.49.
> > > - 6.6.y has already been backported; the changes are included in
> > > v6.6.109.
> > > - 6.1.y has already been backported; the changes are currently in the
> > > 6.1-stable tree.
> > > - 5.15.y has already been backported; the changes are currently in the
> > > 5.15-stable tree.
> >
> > With this series applied, on an arm64 server, building 'allmodconfig', I
> > get the following build error.
> >
> > Oddly I don't see it on my x86 server, perhaps due to different compiler
> > versions?
> >
> > Any ideas?
> >
> > thanks,
> >
> > greg k-h
> >
> > ------------------------
> >
> > In function ‘rt2800_txpower_to_dev’,
> > inlined from ‘rt2800_config_channel’ at ../drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4022:25:
> > ./../include/linux/compiler_types.h:309:45: error: call to ‘__compiletime_assert_1168’ declared with attribute error: clamp() low limit -7 greater than high limit 15
> > 309 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> > | ^
> > ./../include/linux/compiler_types.h:290:25: note: in definition of macro ‘__compiletime_assert’
> > 290 | prefix ## suffix(); \
> > | ^~~~~~
> > ./../include/linux/compiler_types.h:309:9: note: in expansion of macro ‘_compiletime_assert’
> > 309 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> > | ^~~~~~~~~~~~~~~~~~~
> > ../include/linux/build_bug.h:39:37: note: in expansion of macro ‘compiletime_assert’
> > 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
> > | ^~~~~~~~~~~~~~~~~~
> > ../include/linux/minmax.h:188:9: note: in expansion of macro ‘BUILD_BUG_ON_MSG’
> > 188 | BUILD_BUG_ON_MSG(statically_true(ulo > uhi), \
> > | ^~~~~~~~~~~~~~~~
> > ../include/linux/minmax.h:195:9: note: in expansion of macro ‘__clamp_once’
> > 195 | __clamp_once(type, val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
> > | ^~~~~~~~~~~~
> > ../include/linux/minmax.h:218:36: note: in expansion of macro ‘__careful_clamp’
> > 218 | #define clamp_t(type, val, lo, hi) __careful_clamp(type, val, lo, hi)
> > | ^~~~~~~~~~~~~~~
> > ../drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3980:24: note: in expansion of macro ‘clamp_t’
> > 3980 | return clamp_t(char, txpower, MIN_A_TXPOWER, MAX_A_TXPOWER);
> > | ^~~~~~~
>
> Missing commit 3bc753c06dd0 ("kbuild: treat char as always unsigned")?
That's going to be messy to backport, it's not even in 6.1.y, so let's
leave that alone if at all possible.
thanks,
greg k-h
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