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b=BB24ejYjYhTa3VGHJVwJS3Zuf8vBxfWXP1gP7QTxzfgU5BVNQNyUfoi8/gXSmeSpg pAFKA0X8j9JJLhVqrBpQ4pVA9xU3C0fQUCx/q85YkYj0q/zuPTyStNLhGVsTQp72Tu wkus1re/GMkTSF52HiCObx/xxTvBajnrCaatMnGM= Date: Thu, 17 Sep 2026 09:22:37 -0700 From: Andrew Morton To: kernel test robot Cc: David Hildenbrand , Linux Memory Management List , mm-commits@vger.kernel.org, Suren Baghdasaryan Subject: Re: [akpm-mm:mm-new] BUILD REGRESSION 892f5b3b07e5b07f2f29c87750ff94fa58dcab73 Message-Id: <20260917092237.5ba48bf16e8406e3753eacaf@linux-foundation.org> In-Reply-To: <202609171758.049ApqPm-lkp@intel.com> References: <202609171758.049ApqPm-lkp@intel.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: B9AA8C000D X-Stat-Signature: wd14ooqhxfmbf35hz3fbyg9wh1o5rruo X-Rspam-User: X-HE-Tag: 1789662158-668628 X-HE-Meta: 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 ZCT47OSd waItKk2ZmqE2Imikd8U5e9Drk+gv8ThXhsDYF45UfEJzi2+sBu0sHSDymP9/u37yVb5ArcIhkQGUMy2llubkcXPEcp0I5zgrJpyPbadB8w7j3gRrmm3tGzny7IpZ567q6U/GYbhkFxdxJjKmEnRw0eKz7lc0uzO33fljB/46gfOyS5UfEs5hESIbw0AoPJvJJphoFaQ+mCn7jDsBdRSv8Ccq34ykWPU1P0xIoc4vQIBBydDT46wzHtvWMD5Kr7htRFwLuHKKp91ELsyNenruLxWhYllVXmEFh59N9yrdJpDxalkh/1aund9Jau4pStBOUFB1axkTzBu5fO/WAGIvqz1aSMN5hRzh8sw2I Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, 17 Sep 2026 18:00:02 +0800 kernel test robot wrote: > tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new > branch HEAD: 892f5b3b07e5b07f2f29c87750ff94fa58dcab73 mm/swap, PM: hibernate: atomically replace hibernation pin > > Error/Warning (recently discovered and may have been fixed): > > https://lore.kernel.org/oe-kbuild-all/202609171159.oaB1OaSG-lkp@intel.com > > fs/proc/task_mmu.c:3448:3: error: call to undeclared function 'drop_rcu'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] > fs/proc/task_mmu.c:3450:3: error: call to undeclared function 'reacquire_rcu'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] argh, we already fixed this five times. Confirmed with x86_64 and https://download.01.org/0day-ci/archive/20260917/202609171159.oaB1OaSG-lkp@intel.com/config Suren, I'll drop the series. Please check this (and the 'lock_ctx_mm' defined but not used failure) when preparing the planned respin.