Messages in this thread | | | Date | Sun, 5 Nov 2023 12:29:24 +0800 | From | kernel test robot <> | Subject | kernel/dma/contiguous.c:45:26: warning: 'size_bytes' defined but not used |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: aea6bf908d730b01bd264a8821159db9463c111c commit: cf65a0f6f6ff7631ba0ac0513a14ca5b65320d80 dma-mapping: move all DMA mapping code to kernel/dma date: 5 years ago config: x86_64-buildonly-randconfig-r006-20211211 (https://download.01.org/0day-ci/archive/20231105/202311051203.BxWQ2ZeM-lkp@intel.com/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231105/202311051203.BxWQ2ZeM-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@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202311051203.BxWQ2ZeM-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> kernel/dma/contiguous.c:45:26: warning: 'size_bytes' defined but not used [-Wunused-const-variable=] 45 | static const phys_addr_t size_bytes = (phys_addr_t)CMA_SIZE_MBYTES * SZ_1M; | ^~~~~~~~~~
vim +/size_bytes +45 kernel/dma/contiguous.c
a254129e8686bf drivers/base/dma-contiguous.c Joonsoo Kim 2014-08-06 34 c64be2bb1c6eb4 drivers/base/dma-contiguous.c Marek Szyprowski 2011-12-29 35 /* c64be2bb1c6eb4 drivers/base/dma-contiguous.c Marek Szyprowski 2011-12-29 36 * Default global CMA area size can be defined in kernel's .config. 73678804f4e525 drivers/base/dma-contiguous.c Michael Opdenacker 2013-09-18 37 * This is useful mainly for distro maintainers to create a kernel c64be2bb1c6eb4 drivers/base/dma-contiguous.c Marek Szyprowski 2011-12-29 38 * that works correctly for most supported systems. c64be2bb1c6eb4 drivers/base/dma-contiguous.c Marek Szyprowski 2011-12-29 39 * The size can be set in bytes or as a percentage of the total memory c64be2bb1c6eb4 drivers/base/dma-contiguous.c Marek Szyprowski 2011-12-29 40 * in the system. c64be2bb1c6eb4 drivers/base/dma-contiguous.c Marek Szyprowski 2011-12-29 41 * c64be2bb1c6eb4 drivers/base/dma-contiguous.c Marek Szyprowski 2011-12-29 42 * Users, who want to set the size of global CMA area for their system c64be2bb1c6eb4 drivers/base/dma-contiguous.c Marek Szyprowski 2011-12-29 43 * should use cma= kernel parameter. c64be2bb1c6eb4 drivers/base/dma-contiguous.c Marek Szyprowski 2011-12-29 44 */ a785ce9c90bc7d drivers/base/dma-contiguous.c Tan Xiaojun 2015-09-24 @45 static const phys_addr_t size_bytes = (phys_addr_t)CMA_SIZE_MBYTES * SZ_1M; 4009793e15d444 drivers/base/dma-contiguous.c Vitaly Andrianov 2012-12-05 46 static phys_addr_t size_cmdline = -1; 5ea3b1b2f8ad91 drivers/base/dma-contiguous.c Akinobu Mita 2014-06-04 47 static phys_addr_t base_cmdline; 5ea3b1b2f8ad91 drivers/base/dma-contiguous.c Akinobu Mita 2014-06-04 48 static phys_addr_t limit_cmdline; c64be2bb1c6eb4 drivers/base/dma-contiguous.c Marek Szyprowski 2011-12-29 49
:::::: The code at line 45 was first introduced by commit :::::: a785ce9c90bc7d73b5cae4388641b310948509cb CMA: fix CONFIG_CMA_SIZE_MBYTES overflow in 64bit
:::::: TO: Tan Xiaojun <tanxiaojun@huawei.com> :::::: CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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