linux-kernel - s390: block/blk-iocost.c:1101:11: error: call to '__compiletime_assert_557' declared with 'error' attribute: clamp() low limit 1 greater than high limit active

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Message-ID: <CA+G9fYsD7mw13wredcZn0L-KBA3yeoVSTuxnss-AEWMN3ha0cA@mail.gmail.com>
Date: Wed, 4 Dec 2024 16:01:09 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: linux-s390@...r.kernel.org, clang-built-linux <llvm@...ts.linux.dev>, 
	linux-block <linux-block@...r.kernel.org>, open list <linux-kernel@...r.kernel.org>, 
	lkft-triage@...ts.linaro.org, Linux Regressions <regressions@...ts.linux.dev>
Cc: Anders Roxell <anders.roxell@...aro.org>, Arnd Bergmann <arnd@...db.de>, 
	Dan Carpenter <dan.carpenter@...aro.org>, Nathan Chancellor <nathan@...nel.org>, 
	Jens Axboe <axboe@...nel.dk>
Subject: s390: block/blk-iocost.c:1101:11: error: call to '__compiletime_assert_557'
 declared with 'error' attribute: clamp() low limit 1 greater than high limit active

The s390 builds failed with clang-19 with defconfig on the
Linux next-20241203 tag due to following build warnings / errors.
Build pass with gcc-13 defconfig for s390.

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

List of arch and toolchains :
  s390 defconfig with clang-19

s390:
  build:
    * clang-19-defconfig
    * korg-clang-19-lkftconfig-lto-full
    * korg-clang-19-lkftconfig-hardening
    * korg-clang-19-lkftconfig-lto-thing

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

Build log:
===========
block/blk-iocost.c:1101:11: error: call to '__compiletime_assert_557'
declared with 'error' attribute: clamp() low limit 1 greater than high
limit active
 1101 |                 inuse = clamp_t(u32, inuse, 1, active);
      |                         ^
include/linux/minmax.h:218:36: note: expanded from macro 'clamp_t'
  218 | #define clamp_t(type, val, lo, hi) __careful_clamp(type, val, lo, hi)
      |                                    ^
include/linux/minmax.h:195:2: note: expanded from macro '__careful_clamp'
  195 |         __clamp_once(type, val, lo, hi, __UNIQUE_ID(v_),
__UNIQUE_ID(l_), __UNIQUE_ID(h_))
      |         ^
include/linux/minmax.h:188:2: note: expanded from macro '__clamp_once'
  188 |         BUILD_BUG_ON_MSG(statically_true(ulo > uhi),
                 \
      |         ^
note: (skipping 2 expansions in backtrace; use
-fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:530:2: note: expanded from macro
'_compiletime_assert'
  530 |         __compiletime_assert(condition, msg, prefix, suffix)
      |         ^
include/linux/compiler_types.h:523:4: note: expanded from macro
'__compiletime_assert'
  523 |                         prefix ## suffix();
         \
      |                         ^
<scratch space>:38:1: note: expanded from here
   38 | __compiletime_assert_557
      | ^
block/blk-iocost.c:1101:11: error: call to '__compiletime_assert_557'
declared with 'error' attribute: clamp() low limit 1 greater than high
limit active
include/linux/minmax.h:218:36: note: expanded from macro 'clamp_t'
  218 | #define clamp_t(type, val, lo, hi) __careful_clamp(type, val, lo, hi)
      |                                    ^
include/linux/minmax.h:195:2: note: expanded from macro '__careful_clamp'
  195 |         __clamp_once(type, val, lo, hi, __UNIQUE_ID(v_),
__UNIQUE_ID(l_), __UNIQUE_ID(h_))
      |         ^
include/linux/minmax.h:188:2: note: expanded from macro '__clamp_once'
  188 |         BUILD_BUG_ON_MSG(statically_true(ulo > uhi),
                 \
      |         ^
note: (skipping 2 expansions in backtrace; use
-fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:530:2: note: expanded from macro
'_compiletime_assert'
  530 |         __compiletime_assert(condition, msg, prefix, suffix)
      |         ^
include/linux/compiler_types.h:523:4: note: expanded from macro
'__compiletime_assert'
  523 |                         prefix ## suffix();
         \
      |                         ^
<scratch space>:38:1: note: expanded from here
   38 | __compiletime_assert_557
      | ^
2 errors generated.

Links:
---
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241203/testrun/26188938/suite/build/test/clang-19-defconfig/log
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241203/testrun/26188938/suite/build/test/clang-19-defconfig/history/
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241203/testrun/26188938/suite/build/test/clang-19-defconfig/details/

Steps to reproduce:
------------
# tuxmake --runtime podman --target-arch s390 --toolchain clang-19
--kconfig defconfig LLVM_IAS=1

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/2pjAPS9UrJkbAKFHktQei7eqW4Y/config
  build url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2pjAPS9UrJkbAKFHktQei7eqW4Y/
  toolchain: clang-19
  config: clang-19-defconfig
  arch: s390

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