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Message-ID: <202511102053.StJy9JAB-lkp@intel.com>
Date: Mon, 10 Nov 2025 20:12:34 +0800
From: kernel test robot <lkp@...el.com>
To: Youngjun Park <youngjun.park@....com>, akpm@...ux-foundation.org,
linux-mm@...ck.org
Cc: oe-kbuild-all@...ts.linux.dev, cgroups@...r.kernel.org,
linux-kernel@...r.kernel.org, chrisl@...nel.org, kasong@...cent.com,
hannes@...xchg.org, mhocko@...nel.org, roman.gushchin@...ux.dev,
shakeel.butt@...ux.dev, muchun.song@...ux.dev,
shikemeng@...weicloud.com, nphamcs@...il.com, bhe@...hat.com,
baohua@...nel.org, youngjun.park@....com, gunho.lee@....com,
taejoon.song@....com
Subject: Re: [PATCH 3/3] mm/swap: integrate swap tier infrastructure into
swap subsystem
Hi Youngjun,
kernel test robot noticed the following build errors:
[auto build test ERROR on akpm-mm/mm-everything]
url: https://github.com/intel-lab-lkp/linux/commits/Youngjun-Park/mm-swap-introduce-swap-tier-infrastructure/20251109-215033
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20251109124947.1101520-4-youngjun.park%40lge.com
patch subject: [PATCH 3/3] mm/swap: integrate swap tier infrastructure into swap subsystem
config: s390-randconfig-001-20251110 (https://download.01.org/0day-ci/archive/20251110/202511102053.StJy9JAB-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251110/202511102053.StJy9JAB-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/202511102053.StJy9JAB-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from mm/page_io.c:29:
>> mm/swap_tier.h:71:1: error: expected identifier or '(' before '{' token
{
^
mm/swap_tier.h:70:19: warning: 'swap_tiers_collect_compare_mask' declared 'static' but never defined [-Wunused-function]
static inline int swap_tiers_collect_compare_mask(struct mem_cgroup *memcg);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
In file included from mm/swapfile.c:52:
>> mm/swap_tier.h:71:1: error: expected identifier or '(' before '{' token
{
^
mm/swapfile.c: In function 'swap_alloc_entry':
>> mm/swapfile.c:1309:29: error: 'struct swap_info_struct' has no member named 'tier_idx'
if (swap_tiers_test_off(si->tier_idx, mask))
^~
In file included from mm/swapfile.c:52:
mm/swapfile.c: At top level:
mm/swap_tier.h:70:19: warning: 'swap_tiers_collect_compare_mask' used but never defined
static inline int swap_tiers_collect_compare_mask(struct mem_cgroup *memcg);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
In file included from mm/memcontrol.c:71:
>> mm/swap_tier.h:71:1: error: expected identifier or '(' before '{' token
{
^
mm/memcontrol.c: In function 'mem_cgroup_free':
>> mm/memcontrol.c:3734:2: error: implicit declaration of function 'swap_tiers_put_mask'; did you mean 'swap_tiers_release'? [-Werror=implicit-function-declaration]
swap_tiers_put_mask(memcg);
^~~~~~~~~~~~~~~~~~~
swap_tiers_release
In file included from mm/memcontrol.c:71:
mm/memcontrol.c: At top level:
mm/swap_tier.h:70:19: warning: 'swap_tiers_collect_compare_mask' declared 'static' but never defined [-Wunused-function]
static inline int swap_tiers_collect_compare_mask(struct mem_cgroup *memcg);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for OF_GPIO
Depends on [n]: GPIOLIB [=y] && OF [=y] && HAS_IOMEM [=n]
Selected by [y]:
- REGULATOR_RT5133 [=y] && REGULATOR [=y] && I2C [=y] && GPIOLIB [=y] && OF [=y]
vim +71 mm/swap_tier.h
c17fe68325c921 Youngjun Park 2025-11-09 41
c17fe68325c921 Youngjun Park 2025-11-09 42 void swap_tiers_init(void);
c17fe68325c921 Youngjun Park 2025-11-09 43 int swap_tiers_add(struct tiers_desc desc[], int nr);
c17fe68325c921 Youngjun Park 2025-11-09 44 int swap_tiers_remove(struct tiers_desc desc[], int nr);
c17fe68325c921 Youngjun Park 2025-11-09 45 ssize_t swap_tiers_show_sysfs(char *buf);
c17fe68325c921 Youngjun Park 2025-11-09 46 void swap_tiers_show_memcg(struct seq_file *m, struct mem_cgroup *memcg);
c17fe68325c921 Youngjun Park 2025-11-09 47 void swap_tiers_assign(struct swap_info_struct *swp);
c17fe68325c921 Youngjun Park 2025-11-09 48 void swap_tiers_release(struct swap_info_struct *swp);
c17fe68325c921 Youngjun Park 2025-11-09 49 int swap_tiers_get_mask(struct tiers_desc *desc, int nr, struct mem_cgroup *memcg);
c17fe68325c921 Youngjun Park 2025-11-09 50 void swap_tiers_put_mask(struct mem_cgroup *memcg);
c17fe68325c921 Youngjun Park 2025-11-09 51 static inline bool swap_tiers_test_off(int tier_idx, int mask)
c17fe68325c921 Youngjun Park 2025-11-09 52 {
c17fe68325c921 Youngjun Park 2025-11-09 53 return TIER_MASK(tier_idx, TIER_OFF_MASK) & mask;
c17fe68325c921 Youngjun Park 2025-11-09 54 }
c17fe68325c921 Youngjun Park 2025-11-09 55 int swap_tiers_collect_compare_mask(struct mem_cgroup *memcg);
c17fe68325c921 Youngjun Park 2025-11-09 56 #else
c17fe68325c921 Youngjun Park 2025-11-09 57 static inline void swap_tiers_init(void)
c17fe68325c921 Youngjun Park 2025-11-09 58 {
c17fe68325c921 Youngjun Park 2025-11-09 59 }
c17fe68325c921 Youngjun Park 2025-11-09 60 static inline void swap_tiers_assign(struct swap_info_struct *swp)
c17fe68325c921 Youngjun Park 2025-11-09 61 {
c17fe68325c921 Youngjun Park 2025-11-09 62 }
c17fe68325c921 Youngjun Park 2025-11-09 63 static inline void swap_tiers_release(struct swap_info_struct *swp)
c17fe68325c921 Youngjun Park 2025-11-09 64 {
c17fe68325c921 Youngjun Park 2025-11-09 65 }
c17fe68325c921 Youngjun Park 2025-11-09 66 static inline bool swap_tiers_test_off(int tier_off_mask, int mask)
c17fe68325c921 Youngjun Park 2025-11-09 67 {
c17fe68325c921 Youngjun Park 2025-11-09 68 return false;
c17fe68325c921 Youngjun Park 2025-11-09 69 }
c17fe68325c921 Youngjun Park 2025-11-09 70 static inline int swap_tiers_collect_compare_mask(struct mem_cgroup *memcg);
c17fe68325c921 Youngjun Park 2025-11-09 @71 {
--
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