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Message-ID: <202602081252.5GSGYfhI-lkp@intel.com>
Date: Sun, 8 Feb 2026 12:22:51 +0800
From: kernel test robot <lkp@...el.com>
To: Rajveer Chaudhari <rajveer.chaudhari.linux@...il.com>,
parthiban.veerasooran@...rochip.com, christian.gromm@...rochip.com
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
gregkh@...uxfoundation.org, linux-staging@...ts.linux.dev,
linux-kernel@...r.kernel.org,
Rajveer Chaudhari <rajveer.chaudhari.linux@...il.com>
Subject: Re: [PATCH] staging: most: dim2: remove unused header includes
Hi Rajveer,
kernel test robot noticed the following build errors:
[auto build test ERROR on staging/staging-testing]
url: https://github.com/intel-lab-lkp/linux/commits/Rajveer-Chaudhari/staging-most-dim2-remove-unused-header-includes/20260208-052613
base: staging/staging-testing
patch link: https://lore.kernel.org/r/20260207212354.51694-1-rajveer.chaudhari.linux%40gmail.com
patch subject: [PATCH] staging: most: dim2: remove unused header includes
config: um-allmodconfig (https://download.01.org/0day-ci/archive/20260208/202602081252.5GSGYfhI-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260208/202602081252.5GSGYfhI-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/202602081252.5GSGYfhI-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from drivers/staging/most/dim2/hal.c:14:
In file included from include/linux/io.h:12:
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/staging/most/dim2/hal.c:114:22: error: call to undeclared function 'DIV_ROUND_UP'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
114 | u32 const blocks = DIV_ROUND_UP(size, DBR_BLOCK_SIZE);
| ^
drivers/staging/most/dim2/hal.c:134:21: error: call to undeclared function 'DIV_ROUND_UP'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
134 | u32 const blocks = DIV_ROUND_UP(size, DBR_BLOCK_SIZE);
| ^
drivers/staging/most/dim2/hal.c:759:18: error: call to undeclared function 'DIV_ROUND_UP'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
759 | ch->dbr_size = ROUND_UP_TO(hw_buffer_size, DBR_BLOCK_SIZE);
| ^
drivers/staging/most/dim2/hal.c:46:29: note: expanded from macro 'ROUND_UP_TO'
46 | #define ROUND_UP_TO(x, d) (DIV_ROUND_UP(x, (d)) * (d))
| ^
1 warning and 3 errors generated.
vim +/DIV_ROUND_UP +114 drivers/staging/most/dim2/hal.c
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 95
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 96 /**
51ca97af82af8a drivers/staging/most/dim2/hal.c Lee Jones 2021-04-14 97 * alloc_dbr() - Allocates DBR memory.
7af9b4444fab2e drivers/staging/most/dim2/hal.c Lee Jones 2021-04-14 98 * @size: Allocating memory size.
51ca97af82af8a drivers/staging/most/dim2/hal.c Lee Jones 2021-04-14 99 * Returns: Offset in DBR memory by success or DBR_SIZE if out of memory.
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 100 */
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 101 static int alloc_dbr(u16 size)
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 102 {
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 103 int mask_size;
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 104 int i, block_idx = 0;
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 105
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 106 if (size <= 0)
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 107 return DBR_SIZE; /* out of memory */
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 108
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 109 mask_size = dbr_get_mask_size(size);
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 110 if (mask_size == 0)
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 111 return DBR_SIZE; /* out of memory */
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 112
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 113 for (i = 0; i < DBR_MAP_SIZE; i++) {
bdc58e3bef647b drivers/staging/most/hdm-dim2/dim2_hal.c simran singhal 2017-02-22 @114 u32 const blocks = DIV_ROUND_UP(size, DBR_BLOCK_SIZE);
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 115 u32 mask = ~((~(u32)0) << blocks);
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 116
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 117 do {
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 118 if ((g.dbr_map[i] & mask) == 0) {
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 119 g.dbr_map[i] |= mask;
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 120 return block_idx * DBR_BLOCK_SIZE;
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 121 }
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 122 block_idx += mask_size;
9158d33a5d38d1 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-10-15 123 /* do shift left with 2 steps in case mask_size == 32 */
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 124 mask <<= mask_size - 1;
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 125 } while ((mask <<= 1) != 0);
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 126 }
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 127
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 128 return DBR_SIZE; /* out of memory */
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 129 }
ba3d7ddfb5c6a2 drivers/staging/most/hdm-dim2/dim2_hal.c Christian Gromm 2015-07-24 130
--
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