tree: https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git slub-percpu-caches-v1 head: 23793c9cd4b2fc31144dba68dd67554b8e4308e9 commit: 88f3fc9382220fb76fbd700a74cce623dadf8138 [2/5] mm, slub: add opt-in slub_percpu_array config: hexagon-randconfig-r016-20230808 (https://download.01.org/0day-ci/archive/20230808/202308082130.CSS5uQs2-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce: (https://download.01.org/0day-ci/archive/20230808/202308082130.CSS5uQs2-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202308082130.CSS5uQs2-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from mm/slub.c:14: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:334: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 547 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from mm/slub.c:14: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:334: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from mm/slub.c:14: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:334: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 584 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ mm/slub.c:2351:15: warning: variable 'partial_slabs' set but not used [-Wunused-but-set-variable] 2351 | unsigned int partial_slabs = 0; | ^ >> mm/slub.c:3568:12: error: call to undeclared function 'alloc_from_pca'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 3568 | object = alloc_from_pca(s); | ^ >> mm/slub.c:3568:10: error: incompatible integer to pointer conversion assigning to 'void *' from 'int' [-Wint-conversion] 3568 | object = alloc_from_pca(s); | ^ ~~~~~~~~~~~~~~~~~ 7 warnings and 2 errors generated. vim +/alloc_from_pca +3568 mm/slub.c 3541 3542 /* 3543 * Inlined fastpath so that allocation functions (kmalloc, kmem_cache_alloc) 3544 * have the fastpath folded into their functions. So no function call 3545 * overhead for requests that can be satisfied on the fastpath. 3546 * 3547 * The fastpath works by first checking if the lockless freelist can be used. 3548 * If not then __slab_alloc is called for slow processing. 3549 * 3550 * Otherwise we can simply pick the next object from the lockless free list. 3551 */ 3552 static __fastpath_inline void *slab_alloc_node(struct kmem_cache *s, struct list_lru *lru, 3553 gfp_t gfpflags, int node, unsigned long addr, size_t orig_size) 3554 { 3555 void *object; 3556 struct obj_cgroup *objcg = NULL; 3557 bool init = false; 3558 3559 s = slab_pre_alloc_hook(s, lru, &objcg, 1, gfpflags); 3560 if (!s) 3561 return NULL; 3562 3563 object = kfence_alloc(s, orig_size, gfpflags); 3564 if (unlikely(object)) 3565 goto out; 3566 3567 if (s->cpu_array) > 3568 object = alloc_from_pca(s); 3569 3570 if (!object) 3571 object = __slab_alloc_node(s, gfpflags, node, addr, orig_size); 3572 3573 maybe_wipe_obj_freeptr(s, object); 3574 init = slab_want_init_on_alloc(gfpflags, s); 3575 3576 out: 3577 /* 3578 * When init equals 'true', like for kzalloc() family, only 3579 * @orig_size bytes might be zeroed instead of s->object_size 3580 */ 3581 slab_post_alloc_hook(s, objcg, gfpflags, 1, &object, init, orig_size); 3582 3583 return object; 3584 } 3585 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
