linux-kernel - arm64: include/linux/compiler_types.h:542:38: error: call to '__compiletime_assert_1050' declared with attribute error: clamp() low limit min greater than high limit max

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Message-ID: <CA+G9fYsT34UkGFKxus63H6UVpYi5GRZkezT9MRLfAbM3f6ke0g@mail.gmail.com>
Date: Thu, 5 Dec 2024 20:15:13 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: open list <linux-kernel@...r.kernel.org>, lkft-triage@...ts.linaro.org, 
	Linux Regressions <regressions@...ts.linux.dev>, 
	Linux ARM <linux-arm-kernel@...ts.infradead.org>, netfilter-devel@...r.kernel.org
Cc: Arnd Bergmann <arnd@...db.de>, Dan Carpenter <dan.carpenter@...aro.org>, 
	Anders Roxell <anders.roxell@...aro.org>, Johannes Berg <johannes.berg@...el.com>, toke@...nel.org, 
	Al Viro <viro@...iv.linux.org.uk>, kernel@...rr.cc, kees@...nel.org
Subject: arm64: include/linux/compiler_types.h:542:38: error: call to
 '__compiletime_assert_1050' declared with attribute error: clamp() low limit
 min greater than high limit max_avail

The arm64 build started failing from Linux next-20241203 tag with gcc-8
due to following build warnings / errors.

First seen on Linux next-20241203 tag
GOOD: Linux next-20241128 tag
BAD: Linux next-20241203 tag and next-20241205 tag

* arm64, build
  - gcc-8-defconfig
  - gcc-8-defconfig-40bc7ee5

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

Build log:
===========
net/netfilter/ipvs/ip_vs_conn.c: In function 'ip_vs_conn_init':
include/linux/compiler_types.h:542:38: error: call to
'__compiletime_assert_1050' declared with attribute error: clamp() low
limit min greater than high limit max_avail
  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                                      ^
include/linux/compiler_types.h:523:4: note: in definition of macro
'__compiletime_assert'
    prefix ## suffix();    \
    ^~~~~~
include/linux/compiler_types.h:542:2: note: in expansion of macro
'_compiletime_assert'
  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
  ^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:37: note: in expansion of macro
'compiletime_assert'
 #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                     ^~~~~~~~~~~~~~~~~~
include/linux/minmax.h:188:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
  BUILD_BUG_ON_MSG(statically_true(ulo > uhi),    \
  ^~~~~~~~~~~~~~~~
include/linux/minmax.h:195:2: note: in expansion of macro '__clamp_once'
  __clamp_once(type, val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_),
__UNIQUE_ID(h_))
  ^~~~~~~~~~~~
include/linux/minmax.h:206:28: note: in expansion of macro '__careful_clamp'
 #define clamp(val, lo, hi) __careful_clamp(__auto_type, val, lo, hi)
                            ^~~~~~~~~~~~~~~
net/netfilter/ipvs/ip_vs_conn.c:1498:8: note: in expansion of macro 'clamp'
  max = clamp(max, min, max_avail);
        ^~~~~

Links:
---
- https://storage.tuxsuite.com/public/linaro/lkft/builds/2pjAOE9K3Dz9gRywrldKTyaXQoT/
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241203/testrun/26189105/suite/build/test/gcc-8-defconfig/log
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241203/testrun/26189105/suite/build/test/gcc-8-defconfig/details/
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241203/testrun/26189105/suite/build/test/gcc-8-defconfig/history/

Steps to reproduce:
------------
# tuxmake --runtime podman --target-arch arm64 --toolchain gcc-8
--kconfig defconfig

metadata:
----
  git describe: next-20241203
  git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
  git sha: c245a7a79602ccbee780c004c1e4abcda66aec32
  kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2pjAOE9K3Dz9gRywrldKTyaXQoT/config
  build url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2pjAOE9K3Dz9gRywrldKTyaXQoT/
  toolchain: gcc-8
  config: gcc-8-defconfig
  arch: arm64

--
Linaro LKFT
https://lkft.linaro.org