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X-CSE-ConnectionGUID: +gAV04UOSImK5W1swbtv5A== X-CSE-MsgGUID: /ku5DQFQSjmqjFn9VOy/Dw== X-IronPort-AV: E=McAfee;i="6800,10657,11668"; a="87023224" X-IronPort-AV: E=Sophos;i="6.21,218,1763452800"; d="scan'208";a="87023224" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jan 2026 05:42:45 -0800 X-CSE-ConnectionGUID: O04x6UXhTrKn0aRfUPFHag== X-CSE-MsgGUID: p2q+HO5gR32pMc7VgNNUdA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,218,1763452800"; d="scan'208";a="208406568" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by orviesa004.jf.intel.com with ESMTP; 11 Jan 2026 05:42:39 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1veviH-00000000A74-0Vqt; Sun, 11 Jan 2026 13:42:37 +0000 Date: Sun, 11 Jan 2026 21:42:05 +0800 From: kernel test robot To: Arnd Bergmann Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Hans Verkuil Subject: arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress' Message-ID: <202601112156.tjNlDnmO-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Hi Arnd, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 755bc1335e3b116b702205b72eb57b7b8aef2bb2 commit: 8d46603eeeb4c6abff1d2e49f2a6ae289dac765e media: cxd2841er: fix 64-bit division on gcc-9 date: 1 year, 1 month ago config: powerpc-randconfig-r063-20260111 (https://download.01.org/0day-ci/archive/20260111/202601112156.tjNlDnmO-lkp@intel.com/config) compiler: powerpc-linux-gcc (GCC) 9.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260111/202601112156.tjNlDnmO-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202601112156.tjNlDnmO-lkp@intel.com/ All errors (new ones prefixed by >>): powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress': >> arch/powerpc/boot/decompress.c:132: undefined reference to `__decompress' Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for HOTPLUG_CPU Depends on [n]: SMP [=y] && (PPC_PSERIES [=n] || PPC_PMAC [=n] || PPC_POWERNV [=n] || FSL_SOC_BOOKE [=n]) Selected by [y]: - PM_SLEEP_SMP [=y] && SMP [=y] && (ARCH_SUSPEND_POSSIBLE [=y] || ARCH_HIBERNATION_POSSIBLE [=y]) && PM_SLEEP [=y] vim +132 arch/powerpc/boot/decompress.c 1b7898ee276b39 Oliver O'Halloran 2016-09-22 97 1b7898ee276b39 Oliver O'Halloran 2016-09-22 98 /** 1b7898ee276b39 Oliver O'Halloran 2016-09-22 99 * partial_decompress - decompresses part or all of a compressed buffer 1b7898ee276b39 Oliver O'Halloran 2016-09-22 100 * @inbuf: input buffer 1b7898ee276b39 Oliver O'Halloran 2016-09-22 101 * @input_size: length of the input buffer 930a77c3ad79c3 Zhang Jianhua 2021-05-10 102 * @outbuf: output buffer 930a77c3ad79c3 Zhang Jianhua 2021-05-10 103 * @output_size: length of the output buffer 6efc2f1a64ef62 Yang Li 2024-04-08 104 * @_skip: number of output bytes to ignore 1b7898ee276b39 Oliver O'Halloran 2016-09-22 105 * 1b7898ee276b39 Oliver O'Halloran 2016-09-22 106 * This function takes compressed data from inbuf, decompresses and write it to 1b7898ee276b39 Oliver O'Halloran 2016-09-22 107 * outbuf. Once output_size bytes are written to the output buffer, or the 1b7898ee276b39 Oliver O'Halloran 2016-09-22 108 * stream is exhausted the function will return the number of bytes that were 1b7898ee276b39 Oliver O'Halloran 2016-09-22 109 * decompressed. Otherwise it will return whatever error code the decompressor 1b7898ee276b39 Oliver O'Halloran 2016-09-22 110 * reported (NB: This is specific to each decompressor type). 1b7898ee276b39 Oliver O'Halloran 2016-09-22 111 * 1b7898ee276b39 Oliver O'Halloran 2016-09-22 112 * The skip functionality is mainly there so the program and discover 1b7898ee276b39 Oliver O'Halloran 2016-09-22 113 * the size of the compressed image so that it can ask firmware (if present) 1b7898ee276b39 Oliver O'Halloran 2016-09-22 114 * for an appropriately sized buffer. 1b7898ee276b39 Oliver O'Halloran 2016-09-22 115 */ 1b7898ee276b39 Oliver O'Halloran 2016-09-22 116 long partial_decompress(void *inbuf, unsigned long input_size, 1b7898ee276b39 Oliver O'Halloran 2016-09-22 117 void *outbuf, unsigned long output_size, unsigned long _skip) 1b7898ee276b39 Oliver O'Halloran 2016-09-22 118 { 1b7898ee276b39 Oliver O'Halloran 2016-09-22 119 int ret; 1b7898ee276b39 Oliver O'Halloran 2016-09-22 120 1b7898ee276b39 Oliver O'Halloran 2016-09-22 121 /* 1b7898ee276b39 Oliver O'Halloran 2016-09-22 122 * The skipped bytes needs to be included in the size of data we want 1b7898ee276b39 Oliver O'Halloran 2016-09-22 123 * to decompress. 1b7898ee276b39 Oliver O'Halloran 2016-09-22 124 */ 1b7898ee276b39 Oliver O'Halloran 2016-09-22 125 output_size += _skip; 1b7898ee276b39 Oliver O'Halloran 2016-09-22 126 1b7898ee276b39 Oliver O'Halloran 2016-09-22 127 decompressed_bytes = 0; 1b7898ee276b39 Oliver O'Halloran 2016-09-22 128 output_buffer = outbuf; 1b7898ee276b39 Oliver O'Halloran 2016-09-22 129 limit = output_size; 1b7898ee276b39 Oliver O'Halloran 2016-09-22 130 skip = _skip; 1b7898ee276b39 Oliver O'Halloran 2016-09-22 131 1b7898ee276b39 Oliver O'Halloran 2016-09-22 @132 ret = __decompress(inbuf, input_size, NULL, flush, outbuf, :::::: The code at line 132 was first introduced by commit :::::: 1b7898ee276b39e54d870dc4ef3374f663d0b426 powerpc/boot: Use the pre-boot decompression API :::::: TO: Oliver O'Halloran :::::: CC: Michael Ellerman -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki