[android-common:android17-6.18-2026-04 0/1] fs/proc/base.c:3279:4-39: opportunity for str_yes_no(mm_flags_test ( MMF_VM_MERGE_ANY , mm ))

[android-common:android17-6.18-2026-04 0/1] fs/proc/base.c:3279:4-39: opportunity for str_yes_no(mm_flags_test ( MMF_VM_MERGE_ANY , mm ))

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: cros-kernel-buildreports@googlegroups.com

Hi Lorenzo,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://android.googlesource.com/kernel/common android17-6.18-2026-04
head:   6794f901dd75b16bbfd428ab3be1e510710da4c7
commit: d14d3f535e13ff0661b9a74133a8d6b9f9950712 [0/1] mm: convert remaining users to mm_flags_*() accessors
:::::: branch date: 12 hours ago
:::::: commit date: 8 months ago
config: i386-randconfig-053-20260521 (https://download.01.org/0day-ci/archive/20260521/202605210751.KFEYbLMy-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0

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
| Fixes: d14d3f535e13 ("mm: convert remaining users to mm_flags_*() accessors")
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Julia Lawall <julia.lawall@inria.fr>
| Closes: https://lore.kernel.org/r/202605210751.KFEYbLMy-lkp@intel.com/

cocci warnings: (new ones prefixed by >>)
   fs/proc/base.c:3286:4-29: opportunity for str_yes_no(ksm_process_mergeable ( mm ))
>> fs/proc/base.c:3279:4-39: opportunity for str_yes_no(mm_flags_test ( MMF_VM_MERGE_ANY , mm ))

vim +3279 fs/proc/base.c

7c23b330011690 Josh Poimboeuf  2017-02-13  3251  
7609385337a4fe xu xin          2022-04-28  3252  #ifdef CONFIG_KSM
7609385337a4fe xu xin          2022-04-28  3253  static int proc_pid_ksm_merging_pages(struct seq_file *m, struct pid_namespace *ns,
7609385337a4fe xu xin          2022-04-28  3254  				struct pid *pid, struct task_struct *task)
7609385337a4fe xu xin          2022-04-28  3255  {
7609385337a4fe xu xin          2022-04-28  3256  	struct mm_struct *mm;
7609385337a4fe xu xin          2022-04-28  3257  
7609385337a4fe xu xin          2022-04-28  3258  	mm = get_task_mm(task);
7609385337a4fe xu xin          2022-04-28  3259  	if (mm) {
7609385337a4fe xu xin          2022-04-28  3260  		seq_printf(m, "%lu\n", mm->ksm_merging_pages);
7609385337a4fe xu xin          2022-04-28  3261  		mmput(mm);
7609385337a4fe xu xin          2022-04-28  3262  	}
7609385337a4fe xu xin          2022-04-28  3263  
7609385337a4fe xu xin          2022-04-28  3264  	return 0;
7609385337a4fe xu xin          2022-04-28  3265  }
cb4df4cae4f2bd xu xin          2022-08-30  3266  static int proc_pid_ksm_stat(struct seq_file *m, struct pid_namespace *ns,
cb4df4cae4f2bd xu xin          2022-08-30  3267  				struct pid *pid, struct task_struct *task)
cb4df4cae4f2bd xu xin          2022-08-30  3268  {
cb4df4cae4f2bd xu xin          2022-08-30  3269  	struct mm_struct *mm;
3ab76c767bc783 xu xin          2025-01-10  3270  	int ret = 0;
cb4df4cae4f2bd xu xin          2022-08-30  3271  
cb4df4cae4f2bd xu xin          2022-08-30  3272  	mm = get_task_mm(task);
cb4df4cae4f2bd xu xin          2022-08-30  3273  	if (mm) {
cb4df4cae4f2bd xu xin          2022-08-30  3274  		seq_printf(m, "ksm_rmap_items %lu\n", mm->ksm_rmap_items);
c2dc78b86e0821 Chengming Zhou  2024-05-28  3275  		seq_printf(m, "ksm_zero_pages %ld\n", mm_ksm_zero_pages(mm));
d21077fbc2fc98 Stefan Roesch   2023-04-17  3276  		seq_printf(m, "ksm_merging_pages %lu\n", mm->ksm_merging_pages);
d21077fbc2fc98 Stefan Roesch   2023-04-17  3277  		seq_printf(m, "ksm_process_profit %ld\n", ksm_process_profit(mm));
3ab76c767bc783 xu xin          2025-01-10  3278  		seq_printf(m, "ksm_merge_any: %s\n",
d14d3f535e13ff Lorenzo Stoakes 2025-08-12 @3279  				mm_flags_test(MMF_VM_MERGE_ANY, mm) ? "yes" : "no");
3ab76c767bc783 xu xin          2025-01-10  3280  		ret = mmap_read_lock_killable(mm);
3ab76c767bc783 xu xin          2025-01-10  3281  		if (ret) {
3ab76c767bc783 xu xin          2025-01-10  3282  			mmput(mm);
3ab76c767bc783 xu xin          2025-01-10  3283  			return ret;
3ab76c767bc783 xu xin          2025-01-10  3284  		}
3ab76c767bc783 xu xin          2025-01-10  3285  		seq_printf(m, "ksm_mergeable: %s\n",
3ab76c767bc783 xu xin          2025-01-10  3286  				ksm_process_mergeable(mm) ? "yes" : "no");
3ab76c767bc783 xu xin          2025-01-10  3287  		mmap_read_unlock(mm);
cb4df4cae4f2bd xu xin          2022-08-30  3288  		mmput(mm);
cb4df4cae4f2bd xu xin          2022-08-30  3289  	}
cb4df4cae4f2bd xu xin          2022-08-30  3290  
cb4df4cae4f2bd xu xin          2022-08-30  3291  	return 0;
cb4df4cae4f2bd xu xin          2022-08-30  3292  }
7609385337a4fe xu xin          2022-04-28  3293  #endif /* CONFIG_KSM */
7609385337a4fe xu xin          2022-04-28  3294  

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