Messages in this thread |  | | Date | Sun, 31 Oct 2021 13:24:56 +0800 | From | kernel test robot <> | Subject | [rt-devel:linux-5.15.y-rt-rebase 95/160] mm/vmalloc.c:1884:24: error: variable 'cpu' set but not used |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.15.y-rt-rebase head: 72f25aab248815ab9e3b9dd088d3c8b3e93fb6d6 commit: 045e9ea1f791ae6c4c54495c7c6b86ed86f702d7 [95/160] mm/vmalloc: Another preempt disable region which sucks config: arm-buildonly-randconfig-r005-20211031 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/commit/?id=045e9ea1f791ae6c4c54495c7c6b86ed86f702d7 git remote add rt-devel https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git git fetch --no-tags rt-devel linux-5.15.y-rt-rebase git checkout 045e9ea1f791ae6c4c54495c7c6b86ed86f702d7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
mm/vmalloc.c: In function 'new_vmap_block': >> mm/vmalloc.c:1884:24: error: variable 'cpu' set but not used [-Werror=unused-but-set-variable] 1884 | int node, err, cpu; | ^~~ mm/vmalloc.c: In function 'vb_alloc': mm/vmalloc.c:1991:13: error: variable 'cpu' set but not used [-Werror=unused-but-set-variable] 1991 | int cpu; | ^~~ cc1: all warnings being treated as errors
vim +/cpu +1884 mm/vmalloc.c
1869 1870 /** 1871 * new_vmap_block - allocates new vmap_block and occupies 2^order pages in this 1872 * block. Of course pages number can't exceed VMAP_BBMAP_BITS 1873 * @order: how many 2^order pages should be occupied in newly allocated block 1874 * @gfp_mask: flags for the page level allocator 1875 * 1876 * Return: virtual address in a newly allocated block or ERR_PTR(-errno) 1877 */ 1878 static void *new_vmap_block(unsigned int order, gfp_t gfp_mask) 1879 { 1880 struct vmap_block_queue *vbq; 1881 struct vmap_block *vb; 1882 struct vmap_area *va; 1883 unsigned long vb_idx; > 1884 int node, err, cpu; 1885 void *vaddr; 1886 1887 node = numa_node_id(); 1888 1889 vb = kmalloc_node(sizeof(struct vmap_block), 1890 gfp_mask & GFP_RECLAIM_MASK, node); 1891 if (unlikely(!vb)) 1892 return ERR_PTR(-ENOMEM); 1893 1894 va = alloc_vmap_area(VMAP_BLOCK_SIZE, VMAP_BLOCK_SIZE, 1895 VMALLOC_START, VMALLOC_END, 1896 node, gfp_mask); 1897 if (IS_ERR(va)) { 1898 kfree(vb); 1899 return ERR_CAST(va); 1900 } 1901 1902 vaddr = vmap_block_vaddr(va->va_start, 0); 1903 spin_lock_init(&vb->lock); 1904 vb->va = va; 1905 /* At least something should be left free */ 1906 BUG_ON(VMAP_BBMAP_BITS <= (1UL << order)); 1907 vb->free = VMAP_BBMAP_BITS - (1UL << order); 1908 vb->dirty = 0; 1909 vb->dirty_min = VMAP_BBMAP_BITS; 1910 vb->dirty_max = 0; 1911 INIT_LIST_HEAD(&vb->free_list); 1912 1913 vb_idx = addr_to_vb_idx(va->va_start); 1914 err = xa_insert(&vmap_blocks, vb_idx, vb, gfp_mask); 1915 if (err) { 1916 kfree(vb); 1917 free_vmap_area(va); 1918 return ERR_PTR(err); 1919 } 1920 1921 cpu = get_cpu_light(); 1922 vbq = this_cpu_ptr(&vmap_block_queue); 1923 spin_lock(&vbq->lock); 1924 list_add_tail_rcu(&vb->free_list, &vbq->free); 1925 spin_unlock(&vbq->lock); 1926 put_cpu_light(); 1927 1928 return vaddr; 1929 } 1930
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