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Message-ID: <202106020644.UDFIJOUU-lkp@intel.com>
Date: Wed, 2 Jun 2021 06:45:55 +0800
From: kernel test robot <lkp@...el.com>
To: Stephen Boyd <swboyd@...omium.org>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
Linux Memory Management List <linux-mm@...ck.org>,
linux-kernel@...r.kernel.org,
Christoph Lameter <cl@...ux-foundation.org>,
Pekka Enberg <penberg@...nel.org>,
David Rientjes <rientjes@...gle.com>,
Joonsoo Kim <iamjoonsoo.kim@....com>,
Vlastimil Babka <vbabka@...e.cz>,
Petr Mladek <pmladek@...e.com>, Joe Perches <joe@...ches.com>
Subject: Re: [PATCH v3 4/4] slub: Force on no_hash_pointers when slub_debug
is enabled
Hi Stephen,
I love your patch! Yet something to improve:
[auto build test ERROR on d07f6ca923ea0927a1024dfccafc5b53b61cfecc]
url: https://github.com/0day-ci/linux/commits/Stephen-Boyd/slub-Print-non-hashed-pointers-in-slub-debugging/20210602-022255
base: d07f6ca923ea0927a1024dfccafc5b53b61cfecc
config: s390-randconfig-r036-20210601 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project db26cd30b6dd65e88d786e97a1e453af5cd48966)
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
# install s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
# https://github.com/0day-ci/linux/commit/ab6ede356a6f366690b4a4e9dd597b63be241ad0
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Stephen-Boyd/slub-Print-non-hashed-pointers-in-slub-debugging/20210602-022255
git checkout ab6ede356a6f366690b4a4e9dd597b63be241ad0
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
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:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:25:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:36:59: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
#define __swab16(x) (__u16)__builtin_bswap16((__u16)(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:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:25:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(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:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:25:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
>> mm/slub.c:4464:30: error: use of undeclared identifier 'slub_debug_enabled'
if (static_branch_unlikely(&slub_debug_enabled))
^
>> mm/slub.c:4464:30: error: use of undeclared identifier 'slub_debug_enabled'
>> mm/slub.c:4464:30: error: use of undeclared identifier 'slub_debug_enabled'
>> mm/slub.c:4464:30: error: use of undeclared identifier 'slub_debug_enabled'
>> mm/slub.c:4464:6: error: invalid argument type 'void' to unary expression
if (static_branch_unlikely(&slub_debug_enabled))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/jump_label.h:496:35: note: expanded from macro 'static_branch_unlikely'
#define static_branch_unlikely(x) unlikely_notrace(static_key_enabled(&(x)->key))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:80:30: note: expanded from macro 'unlikely_notrace'
# define unlikely_notrace(x) unlikely(x)
^~~~~~~~~~~
include/linux/compiler.h:78:40: note: expanded from macro 'unlikely'
# define unlikely(x) __builtin_expect(!!(x), 0)
^~~~
12 warnings and 5 errors generated.
vim +/slub_debug_enabled +4464 mm/slub.c
4453
4454 void __init kmem_cache_init(void)
4455 {
4456 static __initdata struct kmem_cache boot_kmem_cache,
4457 boot_kmem_cache_node;
4458 int node;
4459
4460 if (debug_guardpage_minorder())
4461 slub_max_order = 0;
4462
4463 /* Print slub debugging pointers without hashing */
> 4464 if (static_branch_unlikely(&slub_debug_enabled))
4465 no_hash_pointers_enable(NULL);
4466
4467 kmem_cache_node = &boot_kmem_cache_node;
4468 kmem_cache = &boot_kmem_cache;
4469
4470 /*
4471 * Initialize the nodemask for which we will allocate per node
4472 * structures. Here we don't need taking slab_mutex yet.
4473 */
4474 for_each_node_state(node, N_NORMAL_MEMORY)
4475 node_set(node, slab_nodes);
4476
4477 create_boot_cache(kmem_cache_node, "kmem_cache_node",
4478 sizeof(struct kmem_cache_node), SLAB_HWCACHE_ALIGN, 0, 0);
4479
4480 register_hotmemory_notifier(&slab_memory_callback_nb);
4481
4482 /* Able to allocate the per node structures */
4483 slab_state = PARTIAL;
4484
4485 create_boot_cache(kmem_cache, "kmem_cache",
4486 offsetof(struct kmem_cache, node) +
4487 nr_node_ids * sizeof(struct kmem_cache_node *),
4488 SLAB_HWCACHE_ALIGN, 0, 0);
4489
4490 kmem_cache = bootstrap(&boot_kmem_cache);
4491 kmem_cache_node = bootstrap(&boot_kmem_cache_node);
4492
4493 /* Now we can use the kmem_cache to allocate kmalloc slabs */
4494 setup_kmalloc_cache_index_table();
4495 create_kmalloc_caches(0);
4496
4497 /* Setup random freelists for each cache */
4498 init_freelist_randomization();
4499
4500 cpuhp_setup_state_nocalls(CPUHP_SLUB_DEAD, "slub:dead", NULL,
4501 slub_cpu_dead);
4502
4503 pr_info("SLUB: HWalign=%d, Order=%u-%u, MinObjects=%u, CPUs=%u, Nodes=%u\n",
4504 cache_line_size(),
4505 slub_min_order, slub_max_order, slub_min_objects,
4506 nr_cpu_ids, nr_node_ids);
4507 }
4508
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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