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Message-ID: <202512202146.FY586zON-lkp@intel.com>
Date: Sat, 20 Dec 2025 22:34:07 +0800
From: kernel test robot <lkp@...el.com>
To: Lukas Zapolskas <lukas.zapolskas@....com>,
Boris Brezillon <bbrezillon@...nel.org>,
Liviu Dudau <liviu.dudau@....com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Adrián Larumbe <adrian.larumbe@...labora.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev, nd@....com,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Mihail Atanassov <mihail.atanassov@....com>,
Lukas Zapolskas <lukas.zapolskas@....com>
Subject: Re: [PATCH v6 5/7] drm/panthor: Implement the counter sampler and
sample handling
Hi Lukas,
kernel test robot noticed the following build errors:
[auto build test ERROR on drm-misc/drm-misc-next]
[also build test ERROR on next-20251219]
[cannot apply to linus/master v6.19-rc1]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Lukas-Zapolskas/drm-panthor-Add-performance-counter-uAPI/20251216-012117
base: https://gitlab.freedesktop.org/drm/misc/kernel.git drm-misc-next
patch link: https://lore.kernel.org/r/20251215171453.2506348-6-lukas.zapolskas%40arm.com
patch subject: [PATCH v6 5/7] drm/panthor: Implement the counter sampler and sample handling
config: um-randconfig-001-20251217 (https://download.01.org/0day-ci/archive/20251220/202512202146.FY586zON-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 1335a05ab8bc8339ce24be3a9da89d8c3f4e0571)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251220/202512202146.FY586zON-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 <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512202146.FY586zON-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from drivers/gpu/drm/panthor/panthor_perf.c:5:
In file included from include/drm/drm_file.h:39:
In file included from include/drm/drm_prime.h:37:
In file included from include/linux/scatterlist.h:9:
In file included from arch/um/include/asm/io.h:24:
include/asm-generic/io.h:1209:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
1209 | return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
| ~~~~~~~~~~ ^
>> drivers/gpu/drm/panthor/panthor_perf.c:1045:19: error: incompatible pointer types passing '__u64 (*)[2]' (aka 'unsigned long long (*)[2]') to parameter of type 'u64 *' (aka 'unsigned long long *') [-Wincompatible-pointer-types]
1045 | bitmap_to_arr64(&blk->header.enable_mask, blk_em, PANTHOR_PERF_EM_BITS);
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/bitmap.h:316:27: note: passing argument to parameter 'buf' here
316 | void bitmap_to_arr64(u64 *buf, const unsigned long *bitmap, unsigned int nbits);
| ^
1 warning and 1 error generated.
vim +1045 drivers/gpu/drm/panthor/panthor_perf.c
991
992 /**
993 * session_populate_sample - Write out a new sample into a previously populated slot in the user
994 * ringbuffer and update both the header of the block and the PRFCNT_EN
995 * counter to contain only the selected subset of counters for that block.
996 *
997 * @ptdev: Panthor device
998 * @session: Perf session
999 * @session_sample: Pointer aligned to the start of the data section of the sample in the targeted
1000 * slot.
1001 * @sampler_sample: Pointer aligned to the start of the data section of the intermediate sampler
1002 * buffer.
1003 *
1004 * When a new sample slot is targeted, it must be cleared of the data already existing there,
1005 * enabling a direct copy from the intermediate buffer and then zeroing out any counters
1006 * that are not required for the current session.
1007 */
1008 static void session_populate_sample(struct panthor_device *ptdev,
1009 struct panthor_perf_session *session, u8 *session_sample,
1010 u8 *sampler_sample)
1011 {
1012 const struct drm_panthor_perf_info *const perf_info = &ptdev->perf_info;
1013 const size_t block_size = get_annotated_block_size(perf_info->counters_per_block);
1014 const size_t sample_size = perf_info->sample_size;
1015 const size_t sample_header_size = perf_info->sample_header_size;
1016 const size_t data_size = sample_size - sample_header_size;
1017 const u32 counters = perf_info->counters_per_block;
1018
1019 session_populate_sample_header(session,
1020 (struct drm_panthor_perf_sample_header *)session_sample,
1021 ptdev->perf->sampler.set_config);
1022
1023 session_sample += sample_header_size;
1024
1025 memcpy(session_sample, sampler_sample + sample_header_size, data_size);
1026
1027 for (size_t i = 0; i < data_size; i += block_size) {
1028 DECLARE_BITMAP(em_diff, PANTHOR_PERF_EM_BITS);
1029 struct panthor_perf_counter_block *blk = (typeof(blk))(session_sample + i);
1030 enum drm_panthor_perf_block_type type = blk->header.block_type;
1031 unsigned long *blk_em = session->enabled_counters->mask[type];
1032
1033 bitmap_from_arr64(em_diff, blk->header.enable_mask, PANTHOR_PERF_EM_BITS);
1034
1035 bitmap_andnot(em_diff, em_diff, blk_em, PANTHOR_PERF_EM_BITS);
1036 bitmap_clear(em_diff, 0, PANTHOR_HEADER_COUNTERS);
1037
1038 blk->counters[PANTHOR_CTR_PRFCNT_EN] = compress_enable_mask(counters, blk_em);
1039
1040 for (size_t ctr_idx = PANTHOR_HEADER_COUNTERS; ctr_idx < counters; ctr_idx++) {
1041 if (test_bit(ctr_idx, em_diff))
1042 blk->counters[ctr_idx] = 0;
1043 }
1044
> 1045 bitmap_to_arr64(&blk->header.enable_mask, blk_em, PANTHOR_PERF_EM_BITS);
1046 }
1047 }
1048
--
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