From: kernel test robot <lkp@intel.com>
To: Suren Baghdasaryan <surenb@google.com>
Cc: oe-kbuild-all@lists.linux.dev,
Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>,
"Liam R. Howlett (Oracle)" <liam@infradead.org>,
"Lorenzo Stoakes (ARM)" <ljs@kernel.org>
Subject: [linux-next:master 8327/9480] fs/proc/task_mmu.c:3452:3: error: implicit declaration of function 'drop_rcu'; did you mean 'drop_slab'?
Date: Sat, 26 Sep 2026 19:08:26 +0800 [thread overview]
Message-ID: <202609261818.gGqBcNSM-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: f5f84daefcd92d7a630066635ecea1433ed5eac7
commit: b58393e47de94ac659598675696bb8c281f4c5aa [8327/9480] proc/task_mmu: remove unnecessary inlines in function definitions
config: powerpc64-randconfig-1001-20260926 (https://download.01.org/0day-ci/archive/20260926/202609261818.gGqBcNSM-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260926/202609261818.gGqBcNSM-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609261818.gGqBcNSM-lkp@intel.com/
All errors (new ones prefixed by >>):
fs/proc/task_mmu.c: In function 'show_numa_map':
>> fs/proc/task_mmu.c:3452:3: error: implicit declaration of function 'drop_rcu'; did you mean 'drop_slab'? [-Werror=implicit-function-declaration]
drop_rcu(proc_priv);
^~~~~~~~
drop_slab
>> fs/proc/task_mmu.c:3454:3: error: implicit declaration of function 'reacquire_rcu'; did you mean 'get_file_rcu'? [-Werror=implicit-function-declaration]
reacquire_rcu(proc_priv);
^~~~~~~~~~~~~
get_file_rcu
cc1: some warnings being treated as errors
vim +3452 fs/proc/task_mmu.c
ea3085dd7a4ec21 Suren Baghdasaryan 2026-04-25 3404
f69ff943df6972a Stephen Wilson 2011-05-24 3405 /*
f69ff943df6972a Stephen Wilson 2011-05-24 3406 * Display pages allocated per node and memory policy via /proc.
f69ff943df6972a Stephen Wilson 2011-05-24 3407 */
871305bb2028080 Vlastimil Babka 2018-08-21 3408 static int show_numa_map(struct seq_file *m, void *v)
f69ff943df6972a Stephen Wilson 2011-05-24 3409 {
5b52fc890bece77 Stephen Wilson 2011-05-24 3410 struct numa_maps_private *numa_priv = m->private;
5b52fc890bece77 Stephen Wilson 2011-05-24 3411 struct proc_maps_private *proc_priv = &numa_priv->proc_maps;
f69ff943df6972a Stephen Wilson 2011-05-24 3412 struct vm_area_struct *vma = v;
5b52fc890bece77 Stephen Wilson 2011-05-24 3413 struct numa_maps *md = &numa_priv->md;
f69ff943df6972a Stephen Wilson 2011-05-24 3414 struct file *file = vma->vm_file;
f69ff943df6972a Stephen Wilson 2011-05-24 3415 struct mm_struct *mm = vma->vm_mm;
948927ee9e4f35f David Rientjes 2013-11-12 3416 char buffer[64];
ddc1a5cbc05dc62 Hugh Dickins 2023-10-19 3417 struct mempolicy *pol;
ddc1a5cbc05dc62 Hugh Dickins 2023-10-19 3418 pgoff_t ilx;
948927ee9e4f35f David Rientjes 2013-11-12 3419 int nid;
f69ff943df6972a Stephen Wilson 2011-05-24 3420
f69ff943df6972a Stephen Wilson 2011-05-24 3421 if (!mm)
f69ff943df6972a Stephen Wilson 2011-05-24 3422 return 0;
f69ff943df6972a Stephen Wilson 2011-05-24 3423
5b52fc890bece77 Stephen Wilson 2011-05-24 3424 /* Ensure we start with an empty set of numa_maps statistics. */
5b52fc890bece77 Stephen Wilson 2011-05-24 3425 memset(md, 0, sizeof(*md));
f69ff943df6972a Stephen Wilson 2011-05-24 3426
ddc1a5cbc05dc62 Hugh Dickins 2023-10-19 3427 pol = __get_vma_policy(vma, vma->vm_start, &ilx);
498f237178a3d31 Oleg Nesterov 2014-10-09 3428 if (pol) {
948927ee9e4f35f David Rientjes 2013-11-12 3429 mpol_to_str(buffer, sizeof(buffer), pol);
f69ff943df6972a Stephen Wilson 2011-05-24 3430 mpol_cond_put(pol);
498f237178a3d31 Oleg Nesterov 2014-10-09 3431 } else {
498f237178a3d31 Oleg Nesterov 2014-10-09 3432 mpol_to_str(buffer, sizeof(buffer), proc_priv->task_mempolicy);
498f237178a3d31 Oleg Nesterov 2014-10-09 3433 }
f69ff943df6972a Stephen Wilson 2011-05-24 3434
f69ff943df6972a Stephen Wilson 2011-05-24 3435 seq_printf(m, "%08lx %s", vma->vm_start, buffer);
f69ff943df6972a Stephen Wilson 2011-05-24 3436
f69ff943df6972a Stephen Wilson 2011-05-24 3437 if (file) {
17c2b4ee40beae2 Fabian Frederick 2014-06-06 3438 seq_puts(m, " file=");
08582d678fcf11f Amir Goldstein 2023-10-09 3439 seq_path(m, file_user_path(file), "\n\t= ");
11250fd12eb8a58 Kefeng Wang 2023-07-28 3440 } else if (vma_is_initial_heap(vma)) {
17c2b4ee40beae2 Fabian Frederick 2014-06-06 3441 seq_puts(m, " heap");
11250fd12eb8a58 Kefeng Wang 2023-07-28 3442 } else if (vma_is_initial_stack(vma)) {
17c2b4ee40beae2 Fabian Frederick 2014-06-06 3443 seq_puts(m, " stack");
f69ff943df6972a Stephen Wilson 2011-05-24 3444 }
f69ff943df6972a Stephen Wilson 2011-05-24 3445
a79dda19fe434fd Lorenzo Stoakes (ARM 2026-09-17 3446) if (vma_is_hugetlb(vma))
17c2b4ee40beae2 Fabian Frederick 2014-06-06 3447 seq_puts(m, " huge");
fc360bd9cdcf875 Andrew Morton 2011-10-31 3448
ea3085dd7a4ec21 Suren Baghdasaryan 2026-04-25 3449 /* Skip walking pages if gate VMA */
ea3085dd7a4ec21 Suren Baghdasaryan 2026-04-25 3450 if (vma != get_gate_vma(proc_priv->lock_ctx.mm)) {
ea3085dd7a4ec21 Suren Baghdasaryan 2026-04-25 3451 /* Might sleep. Drop RCU read lock but keep the VMA locked. */
ea3085dd7a4ec21 Suren Baghdasaryan 2026-04-25 @3452 drop_rcu(proc_priv);
ea3085dd7a4ec21 Suren Baghdasaryan 2026-04-25 3453 walk_page_vma(vma, get_show_numa_ops(proc_priv), md);
ea3085dd7a4ec21 Suren Baghdasaryan 2026-04-25 @3454 reacquire_rcu(proc_priv);
ea3085dd7a4ec21 Suren Baghdasaryan 2026-04-25 3455 }
f69ff943df6972a Stephen Wilson 2011-05-24 3456
f69ff943df6972a Stephen Wilson 2011-05-24 3457 if (!md->pages)
f69ff943df6972a Stephen Wilson 2011-05-24 3458 goto out;
f69ff943df6972a Stephen Wilson 2011-05-24 3459
f69ff943df6972a Stephen Wilson 2011-05-24 3460 if (md->anon)
f69ff943df6972a Stephen Wilson 2011-05-24 3461 seq_printf(m, " anon=%lu", md->anon);
f69ff943df6972a Stephen Wilson 2011-05-24 3462
f69ff943df6972a Stephen Wilson 2011-05-24 3463 if (md->dirty)
f69ff943df6972a Stephen Wilson 2011-05-24 3464 seq_printf(m, " dirty=%lu", md->dirty);
f69ff943df6972a Stephen Wilson 2011-05-24 3465
f69ff943df6972a Stephen Wilson 2011-05-24 3466 if (md->pages != md->anon && md->pages != md->dirty)
f69ff943df6972a Stephen Wilson 2011-05-24 3467 seq_printf(m, " mapped=%lu", md->pages);
f69ff943df6972a Stephen Wilson 2011-05-24 3468
f69ff943df6972a Stephen Wilson 2011-05-24 3469 if (md->mapcount_max > 1)
f69ff943df6972a Stephen Wilson 2011-05-24 3470 seq_printf(m, " mapmax=%lu", md->mapcount_max);
f69ff943df6972a Stephen Wilson 2011-05-24 3471
f69ff943df6972a Stephen Wilson 2011-05-24 3472 if (md->swapcache)
f69ff943df6972a Stephen Wilson 2011-05-24 3473 seq_printf(m, " swapcache=%lu", md->swapcache);
f69ff943df6972a Stephen Wilson 2011-05-24 3474
a79dda19fe434fd Lorenzo Stoakes (ARM 2026-09-17 3475) if (md->active < md->pages && !vma_is_hugetlb(vma))
f69ff943df6972a Stephen Wilson 2011-05-24 3476 seq_printf(m, " active=%lu", md->active);
f69ff943df6972a Stephen Wilson 2011-05-24 3477
f69ff943df6972a Stephen Wilson 2011-05-24 3478 if (md->writeback)
f69ff943df6972a Stephen Wilson 2011-05-24 3479 seq_printf(m, " writeback=%lu", md->writeback);
f69ff943df6972a Stephen Wilson 2011-05-24 3480
948927ee9e4f35f David Rientjes 2013-11-12 3481 for_each_node_state(nid, N_MEMORY)
948927ee9e4f35f David Rientjes 2013-11-12 3482 if (md->node[nid])
948927ee9e4f35f David Rientjes 2013-11-12 3483 seq_printf(m, " N%d=%lu", nid, md->node[nid]);
198d1597cc5a12d Rafael Aquini 2015-02-12 3484
198d1597cc5a12d Rafael Aquini 2015-02-12 3485 seq_printf(m, " kernelpagesize_kB=%lu", vma_kernel_pagesize(vma) >> 10);
f69ff943df6972a Stephen Wilson 2011-05-24 3486 out:
f69ff943df6972a Stephen Wilson 2011-05-24 3487 seq_putc(m, '\n');
f69ff943df6972a Stephen Wilson 2011-05-24 3488 return 0;
f69ff943df6972a Stephen Wilson 2011-05-24 3489 }
5b52fc890bece77 Stephen Wilson 2011-05-24 3490
:::::: The code at line 3452 was first introduced by commit
:::::: ea3085dd7a4ec212d6c4b50efca584e0928caa72 fs/proc/task_mmu: read proc/pid/{smaps|numa_maps} under per-vma lock
:::::: TO: Suren Baghdasaryan <surenb@google.com>
:::::: CC: Andrew Morton <akpm@linux-foundation.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2026-09-26 11:09 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=202609261818.gGqBcNSM-lkp@intel.com \
--to=lkp@intel.com \
--cc=akpm@linux-foundation.org \
--cc=liam@infradead.org \
--cc=linux-mm@kvack.org \
--cc=ljs@kernel.org \
--cc=oe-kbuild-all@lists.linux.dev \
--cc=surenb@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.