From nobody Thu Dec 18 07:10:26 2025 Received: from out-188.mta1.migadu.com (out-188.mta1.migadu.com [95.215.58.188]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C6024130AD7 for ; Wed, 1 May 2024 17:26:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.188 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714584415; cv=none; b=MsfA+qoSAB6i+HyK42CSBZsaVxgGqwSJi+tVcRoNsIrorDaztiC34magI7UQEruFf3UTUD+RTvcLqk0wWQsMpHCWv45OQgAZVL24Btob5Sr582c2o4HLlaB7E7XRcLyfW1dPPw6jb7zPp377sRVOpmPcvJGCI1f+TYBftToRlms= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714584415; c=relaxed/simple; bh=eP1W92OTQ6cRKMV+qVyniJGTP4MXmCQjFzRqpGKdWoM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hNDqslJUF9Jsb979Z8gIEUoq72CoPaEvrLF4gwleT8tSQOJUz8MgbFoYLEyYy4rTekuh1R5em/U/O0SqeTdEOyuSsFZemKzGeGgROMmZcWLl+J+pl7R2hqBGm9pZ2hQKINGnHIDCopXe8VPCeEXc3q1uIXJ99nibG+sx7EoXNlY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=YISvIA9+; arc=none smtp.client-ip=95.215.58.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="YISvIA9+" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1714584411; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=tCoAbtrV5bh5IqBSP9ezmAWDh3uY8sBNqfpz/AA9bcI=; b=YISvIA9+kLtsFEh8MdixEMDSsd8PoXaMrMDODnf1eEjM6JbuLCUks/ImDQ8J8NJ2jIUepy HiLDsiFIiMZF5j0TtXoAglBooeB6fZvdFyN7ggcqruY6WnAoev3cXxwgDUVNyvSM4NV8On wbeqCV6XdRAOfOrUrhbc9rSs7VW6dGg= From: Shakeel Butt To: Andrew Morton , Johannes Weiner , Michal Hocko , Roman Gushchin , Muchun Song , Yosry Ahmed , "T . J . Mercier" Cc: kernel-team@meta.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 8/8] memcg: use proper type for mod_memcg_state Date: Wed, 1 May 2024 10:26:17 -0700 Message-ID: <20240501172617.678560-9-shakeel.butt@linux.dev> In-Reply-To: <20240501172617.678560-1-shakeel.butt@linux.dev> References: <20240501172617.678560-1-shakeel.butt@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" The memcg stats update functions can take arbitrary integer but the only input which make sense is enum memcg_stat_item and we don't want these functions to be called with arbitrary integer, so replace the parameter type with enum memcg_stat_item and compiler will be able to warn if memcg stat update functions are called with incorrect index value. Signed-off-by: Shakeel Butt Reviewed-by: T.J. Mercier --- Changes since v3: - N/A include/linux/memcontrol.h | 13 +++++++------ mm/memcontrol.c | 3 ++- 2 files changed, 9 insertions(+), 7 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index ab8a6e884375..030d34e9d117 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -974,7 +974,8 @@ void mem_cgroup_print_oom_group(struct mem_cgroup *memc= g); void folio_memcg_lock(struct folio *folio); void folio_memcg_unlock(struct folio *folio); =20 -void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); +void __mod_memcg_state(struct mem_cgroup *memcg, enum memcg_stat_item idx, + int val); =20 /* try to stablize folio_memcg() for all the pages in a memcg */ static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg) @@ -995,7 +996,7 @@ static inline void mem_cgroup_unlock_pages(void) =20 /* idx can be of type enum memcg_stat_item or node_stat_item */ static inline void mod_memcg_state(struct mem_cgroup *memcg, - int idx, int val) + enum memcg_stat_item idx, int val) { unsigned long flags; =20 @@ -1005,7 +1006,7 @@ static inline void mod_memcg_state(struct mem_cgroup = *memcg, } =20 static inline void mod_memcg_page_state(struct page *page, - int idx, int val) + enum memcg_stat_item idx, int val) { struct mem_cgroup *memcg; =20 @@ -1491,19 +1492,19 @@ static inline void mem_cgroup_print_oom_group(struc= t mem_cgroup *memcg) } =20 static inline void __mod_memcg_state(struct mem_cgroup *memcg, - int idx, + enum memcg_stat_item idx, int nr) { } =20 static inline void mod_memcg_state(struct mem_cgroup *memcg, - int idx, + enum memcg_stat_item idx, int nr) { } =20 static inline void mod_memcg_page_state(struct page *page, - int idx, int val) + enum memcg_stat_item idx, int val) { } =20 diff --git a/mm/memcontrol.c b/mm/memcontrol.c index b4a1b4bb599d..39f8b0df46f6 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -956,7 +956,8 @@ static int memcg_state_val_in_pages(int idx, int val) * @idx: the stat item - can be enum memcg_stat_item or enum node_stat_item * @val: delta to add to the counter, can be negative */ -void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val) +void __mod_memcg_state(struct mem_cgroup *memcg, enum memcg_stat_item idx, + int val) { int i =3D memcg_stats_index(idx); =20 --=20 2.43.0