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Message-ID: <202308162118.motJd6aG-lkp@intel.com>
Date: Wed, 16 Aug 2023 21:14:55 +0800
From: kernel test robot <lkp@...el.com>
To: Qi Zheng <zhengqi.arch@...edance.com>, akpm@...ux-foundation.org,
david@...morbit.com, tkhai@...ru, vbabka@...e.cz,
roman.gushchin@...ux.dev, djwong@...nel.org, brauner@...nel.org,
paulmck@...nel.org, tytso@....edu, steven.price@....com,
cel@...nel.org, senozhatsky@...omium.org, yujie.liu@...el.com,
gregkh@...uxfoundation.org, muchun.song@...ux.dev,
joel@...lfernandes.org, christian.koenig@....com
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org, linux-mm@...ck.org,
dri-devel@...ts.freedesktop.org, linux-fsdevel@...r.kernel.org,
Qi Zheng <zhengqi.arch@...edance.com>,
Muchun Song <songmuchun@...edance.com>
Subject: Re: [PATCH 1/5] mm: move some shrinker-related function declarations
to mm/internal.h
Hi Qi,
kernel test robot noticed the following build warnings:
[auto build test WARNING on brauner-vfs/vfs.all]
[also build test WARNING on linus/master v6.5-rc6 next-20230816]
[cannot apply to akpm-mm/mm-everything drm-misc/drm-misc-next vfs-idmapping/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Qi-Zheng/mm-move-some-shrinker-related-function-declarations-to-mm-internal-h/20230816-163833
base: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git vfs.all
patch link: https://lore.kernel.org/r/20230816083419.41088-2-zhengqi.arch%40bytedance.com
patch subject: [PATCH 1/5] mm: move some shrinker-related function declarations to mm/internal.h
config: riscv-randconfig-r015-20230816 (https://download.01.org/0day-ci/archive/20230816/202308162118.motJd6aG-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce: (https://download.01.org/0day-ci/archive/20230816/202308162118.motJd6aG-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/202308162118.motJd6aG-lkp@intel.com/
All warnings (new ones prefixed by >>):
~~~~~~~~~~ ^
In file included from mm/shrinker_debug.c:7:
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/riscv/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/riscv/include/asm/io.h:136:
include/asm-generic/io.h:751:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insw(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from mm/shrinker_debug.c:7:
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/riscv/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/riscv/include/asm/io.h:136:
include/asm-generic/io.h:759:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insl(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from mm/shrinker_debug.c:7:
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/riscv/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/riscv/include/asm/io.h:136:
include/asm-generic/io.h:768:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsb(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from mm/shrinker_debug.c:7:
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/riscv/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/riscv/include/asm/io.h:136:
include/asm-generic/io.h:777:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsw(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from mm/shrinker_debug.c:7:
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/riscv/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/riscv/include/asm/io.h:136:
include/asm-generic/io.h:786:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsl(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from mm/shrinker_debug.c:7:
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/riscv/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/riscv/include/asm/io.h:136:
include/asm-generic/io.h:1134:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
~~~~~~~~~~ ^
>> mm/shrinker_debug.c:174:5: warning: no previous prototype for function 'shrinker_debugfs_add' [-Wmissing-prototypes]
int shrinker_debugfs_add(struct shrinker *shrinker)
^
mm/shrinker_debug.c:174:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int shrinker_debugfs_add(struct shrinker *shrinker)
^
static
>> mm/shrinker_debug.c:249:16: warning: no previous prototype for function 'shrinker_debugfs_detach' [-Wmissing-prototypes]
struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker,
^
mm/shrinker_debug.c:249:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker,
^
static
>> mm/shrinker_debug.c:265:6: warning: no previous prototype for function 'shrinker_debugfs_remove' [-Wmissing-prototypes]
void shrinker_debugfs_remove(struct dentry *debugfs_entry, int debugfs_id)
^
mm/shrinker_debug.c:265:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void shrinker_debugfs_remove(struct dentry *debugfs_entry, int debugfs_id)
^
static
16 warnings generated.
vim +/shrinker_debugfs_add +174 mm/shrinker_debug.c
bbf535fd6f06b94 Roman Gushchin 2022-05-31 173
5035ebc644aec92 Roman Gushchin 2022-05-31 @174 int shrinker_debugfs_add(struct shrinker *shrinker)
5035ebc644aec92 Roman Gushchin 2022-05-31 175 {
5035ebc644aec92 Roman Gushchin 2022-05-31 176 struct dentry *entry;
e33c267ab70de42 Roman Gushchin 2022-05-31 177 char buf[128];
5035ebc644aec92 Roman Gushchin 2022-05-31 178 int id;
5035ebc644aec92 Roman Gushchin 2022-05-31 179
47a7c01c3efc658 Qi Zheng 2023-06-09 180 lockdep_assert_held(&shrinker_rwsem);
5035ebc644aec92 Roman Gushchin 2022-05-31 181
5035ebc644aec92 Roman Gushchin 2022-05-31 182 /* debugfs isn't initialized yet, add debugfs entries later. */
5035ebc644aec92 Roman Gushchin 2022-05-31 183 if (!shrinker_debugfs_root)
5035ebc644aec92 Roman Gushchin 2022-05-31 184 return 0;
5035ebc644aec92 Roman Gushchin 2022-05-31 185
5035ebc644aec92 Roman Gushchin 2022-05-31 186 id = ida_alloc(&shrinker_debugfs_ida, GFP_KERNEL);
5035ebc644aec92 Roman Gushchin 2022-05-31 187 if (id < 0)
5035ebc644aec92 Roman Gushchin 2022-05-31 188 return id;
5035ebc644aec92 Roman Gushchin 2022-05-31 189 shrinker->debugfs_id = id;
5035ebc644aec92 Roman Gushchin 2022-05-31 190
e33c267ab70de42 Roman Gushchin 2022-05-31 191 snprintf(buf, sizeof(buf), "%s-%d", shrinker->name, id);
5035ebc644aec92 Roman Gushchin 2022-05-31 192
5035ebc644aec92 Roman Gushchin 2022-05-31 193 /* create debugfs entry */
5035ebc644aec92 Roman Gushchin 2022-05-31 194 entry = debugfs_create_dir(buf, shrinker_debugfs_root);
5035ebc644aec92 Roman Gushchin 2022-05-31 195 if (IS_ERR(entry)) {
5035ebc644aec92 Roman Gushchin 2022-05-31 196 ida_free(&shrinker_debugfs_ida, id);
5035ebc644aec92 Roman Gushchin 2022-05-31 197 return PTR_ERR(entry);
5035ebc644aec92 Roman Gushchin 2022-05-31 198 }
5035ebc644aec92 Roman Gushchin 2022-05-31 199 shrinker->debugfs_entry = entry;
5035ebc644aec92 Roman Gushchin 2022-05-31 200
2124f79de6a9096 John Keeping 2023-04-18 201 debugfs_create_file("count", 0440, entry, shrinker,
5035ebc644aec92 Roman Gushchin 2022-05-31 202 &shrinker_debugfs_count_fops);
2124f79de6a9096 John Keeping 2023-04-18 203 debugfs_create_file("scan", 0220, entry, shrinker,
bbf535fd6f06b94 Roman Gushchin 2022-05-31 204 &shrinker_debugfs_scan_fops);
5035ebc644aec92 Roman Gushchin 2022-05-31 205 return 0;
5035ebc644aec92 Roman Gushchin 2022-05-31 206 }
5035ebc644aec92 Roman Gushchin 2022-05-31 207
e33c267ab70de42 Roman Gushchin 2022-05-31 208 int shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...)
e33c267ab70de42 Roman Gushchin 2022-05-31 209 {
e33c267ab70de42 Roman Gushchin 2022-05-31 210 struct dentry *entry;
e33c267ab70de42 Roman Gushchin 2022-05-31 211 char buf[128];
e33c267ab70de42 Roman Gushchin 2022-05-31 212 const char *new, *old;
e33c267ab70de42 Roman Gushchin 2022-05-31 213 va_list ap;
e33c267ab70de42 Roman Gushchin 2022-05-31 214 int ret = 0;
e33c267ab70de42 Roman Gushchin 2022-05-31 215
e33c267ab70de42 Roman Gushchin 2022-05-31 216 va_start(ap, fmt);
e33c267ab70de42 Roman Gushchin 2022-05-31 217 new = kvasprintf_const(GFP_KERNEL, fmt, ap);
e33c267ab70de42 Roman Gushchin 2022-05-31 218 va_end(ap);
e33c267ab70de42 Roman Gushchin 2022-05-31 219
e33c267ab70de42 Roman Gushchin 2022-05-31 220 if (!new)
e33c267ab70de42 Roman Gushchin 2022-05-31 221 return -ENOMEM;
e33c267ab70de42 Roman Gushchin 2022-05-31 222
47a7c01c3efc658 Qi Zheng 2023-06-09 223 down_write(&shrinker_rwsem);
e33c267ab70de42 Roman Gushchin 2022-05-31 224
e33c267ab70de42 Roman Gushchin 2022-05-31 225 old = shrinker->name;
e33c267ab70de42 Roman Gushchin 2022-05-31 226 shrinker->name = new;
e33c267ab70de42 Roman Gushchin 2022-05-31 227
e33c267ab70de42 Roman Gushchin 2022-05-31 228 if (shrinker->debugfs_entry) {
e33c267ab70de42 Roman Gushchin 2022-05-31 229 snprintf(buf, sizeof(buf), "%s-%d", shrinker->name,
e33c267ab70de42 Roman Gushchin 2022-05-31 230 shrinker->debugfs_id);
e33c267ab70de42 Roman Gushchin 2022-05-31 231
e33c267ab70de42 Roman Gushchin 2022-05-31 232 entry = debugfs_rename(shrinker_debugfs_root,
e33c267ab70de42 Roman Gushchin 2022-05-31 233 shrinker->debugfs_entry,
e33c267ab70de42 Roman Gushchin 2022-05-31 234 shrinker_debugfs_root, buf);
e33c267ab70de42 Roman Gushchin 2022-05-31 235 if (IS_ERR(entry))
e33c267ab70de42 Roman Gushchin 2022-05-31 236 ret = PTR_ERR(entry);
e33c267ab70de42 Roman Gushchin 2022-05-31 237 else
e33c267ab70de42 Roman Gushchin 2022-05-31 238 shrinker->debugfs_entry = entry;
e33c267ab70de42 Roman Gushchin 2022-05-31 239 }
e33c267ab70de42 Roman Gushchin 2022-05-31 240
47a7c01c3efc658 Qi Zheng 2023-06-09 241 up_write(&shrinker_rwsem);
e33c267ab70de42 Roman Gushchin 2022-05-31 242
e33c267ab70de42 Roman Gushchin 2022-05-31 243 kfree_const(old);
e33c267ab70de42 Roman Gushchin 2022-05-31 244
e33c267ab70de42 Roman Gushchin 2022-05-31 245 return ret;
e33c267ab70de42 Roman Gushchin 2022-05-31 246 }
e33c267ab70de42 Roman Gushchin 2022-05-31 247 EXPORT_SYMBOL(shrinker_debugfs_rename);
e33c267ab70de42 Roman Gushchin 2022-05-31 248
26e239b37ebdfd1 Joan Bruguera Micó 2023-05-03 @249 struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker,
26e239b37ebdfd1 Joan Bruguera Micó 2023-05-03 250 int *debugfs_id)
5035ebc644aec92 Roman Gushchin 2022-05-31 251 {
badc28d4924bfed Qi Zheng 2023-02-02 252 struct dentry *entry = shrinker->debugfs_entry;
badc28d4924bfed Qi Zheng 2023-02-02 253
47a7c01c3efc658 Qi Zheng 2023-06-09 254 lockdep_assert_held(&shrinker_rwsem);
5035ebc644aec92 Roman Gushchin 2022-05-31 255
e33c267ab70de42 Roman Gushchin 2022-05-31 256 kfree_const(shrinker->name);
14773bfa70e67f4 Tetsuo Handa 2022-07-20 257 shrinker->name = NULL;
e33c267ab70de42 Roman Gushchin 2022-05-31 258
26e239b37ebdfd1 Joan Bruguera Micó 2023-05-03 259 *debugfs_id = entry ? shrinker->debugfs_id : -1;
badc28d4924bfed Qi Zheng 2023-02-02 260 shrinker->debugfs_entry = NULL;
badc28d4924bfed Qi Zheng 2023-02-02 261
badc28d4924bfed Qi Zheng 2023-02-02 262 return entry;
5035ebc644aec92 Roman Gushchin 2022-05-31 263 }
5035ebc644aec92 Roman Gushchin 2022-05-31 264
26e239b37ebdfd1 Joan Bruguera Micó 2023-05-03 @265 void shrinker_debugfs_remove(struct dentry *debugfs_entry, int debugfs_id)
26e239b37ebdfd1 Joan Bruguera Micó 2023-05-03 266 {
26e239b37ebdfd1 Joan Bruguera Micó 2023-05-03 267 debugfs_remove_recursive(debugfs_entry);
26e239b37ebdfd1 Joan Bruguera Micó 2023-05-03 268 ida_free(&shrinker_debugfs_ida, debugfs_id);
26e239b37ebdfd1 Joan Bruguera Micó 2023-05-03 269 }
26e239b37ebdfd1 Joan Bruguera Micó 2023-05-03 270
--
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