From nobody Fri Dec 19 04:02:19 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 B6A7D146595 for ; Mon, 29 Jul 2024 11:20:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722252027; cv=none; b=k6l4lrxirqtEV9eg+V9BSwmtCq39N/la7Iva5eGBDeypGc0xxWL0W82s53ICziauV8vaJyanOEtvm43GmyDSt8gYIYloTIh5DQ6qfnalbjnE3FjwSrfwhVhwKWnc4CtzeTRy8k2/WAbUKI2U/UD2dx1LImDow7XnDmuZCUthFr8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722252027; c=relaxed/simple; bh=ezRZsoVNxvO9p/Es1oKbiCO8zRXU9uaLAm4pSSvGkg4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bXm7S+2RcGOhHq8sSZHf7lrroH+NGpfvnEfXFhOgdez/msv8hjW5XEwVUhlRtO1x9el6LYt39LDb28Jl0TXnoz625KlUIsrRkmeh8pa+YhG4YwAfS/qMfGkagu+n1dOE4xwH3fnZ3KfGpDTbDZZznsMwj0Ew2fe5T42agUL+y9Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mPBuc1PI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="mPBuc1PI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D32CFC4AF0A; Mon, 29 Jul 2024 11:20:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722252027; bh=ezRZsoVNxvO9p/Es1oKbiCO8zRXU9uaLAm4pSSvGkg4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mPBuc1PIJz8zxeEieUPstihcjHXEabomtxQv0t1FNmEjidfXx8YbWGSAUWn5iN7D7 DEyiE44MryR2s94k9jM8AXG6j1u5h/1k3RSSZAOfk3Y/EF+LxFI07oscV3CGh0J6ed B6cj5rJspAo6bNylOz4erxIr8aBwqP+bNW919IGYX/RCEGVxm5tx2i77vy+ZpHd3eT gGh2JRbA9G2mi9iKh2gmOKthWRciie29ZHJjBEseRwcP+hIxFTykM9M4wYVvG1xTBs r6o/CobB/cF4rZDnpSBwcspMXsRequ6xuCHD3GU91Cq49XYzsMeyHEKs66Twok2ApT mJcO8nA17CJeQ== From: alexs@kernel.org To: Vitaly Wool , Miaohe Lin , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, minchan@kernel.org, willy@infradead.org, senozhatsky@chromium.org, david@redhat.com, 42.hyeyoo@gmail.com, Yosry Ahmed , nphamcs@gmail.com Cc: Alex Shi Subject: [PATCH v4 03/22] mm/zsmalloc: convert __zs_map_object/__zs_unmap_object to use zpdesc Date: Mon, 29 Jul 2024 19:25:15 +0800 Message-ID: <20240729112534.3416707-4-alexs@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240729112534.3416707-1-alexs@kernel.org> References: <20240729112534.3416707-1-alexs@kernel.org> 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 Content-Type: text/plain; charset="utf-8" From: Hyeonggon Yoo <42.hyeyoo@gmail.com> These two functions take pointer to an array of struct page. Introduce zpdesc_kmap_atomic() and make __zs_{map,unmap}_object() take pointer to an array of zpdesc instead of page. Add silly type casting when calling them. Casting will be removed late. Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Signed-off-by: Alex Shi --- mm/zsmalloc.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 243677a9c6d2..68a39c233d34 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -243,6 +243,11 @@ struct zs_pool { atomic_t compaction_in_progress; }; =20 +static inline void *zpdesc_kmap_atomic(struct zpdesc *zpdesc) +{ + return kmap_atomic(zpdesc_page(zpdesc)); +} + struct zspage { struct { unsigned int huge:HUGE_BITS; @@ -1061,7 +1066,7 @@ static inline void __zs_cpu_down(struct mapping_area = *area) } =20 static void *__zs_map_object(struct mapping_area *area, - struct page *pages[2], int off, int size) + struct zpdesc *zpdescs[2], int off, int size) { int sizes[2]; void *addr; @@ -1078,10 +1083,10 @@ static void *__zs_map_object(struct mapping_area *a= rea, sizes[1] =3D size - sizes[0]; =20 /* copy object to per-cpu buffer */ - addr =3D kmap_atomic(pages[0]); + addr =3D zpdesc_kmap_atomic(zpdescs[0]); memcpy(buf, addr + off, sizes[0]); kunmap_atomic(addr); - addr =3D kmap_atomic(pages[1]); + addr =3D zpdesc_kmap_atomic(zpdescs[1]); memcpy(buf + sizes[0], addr, sizes[1]); kunmap_atomic(addr); out: @@ -1089,7 +1094,7 @@ static void *__zs_map_object(struct mapping_area *are= a, } =20 static void __zs_unmap_object(struct mapping_area *area, - struct page *pages[2], int off, int size) + struct zpdesc *zpdescs[2], int off, int size) { int sizes[2]; void *addr; @@ -1108,10 +1113,10 @@ static void __zs_unmap_object(struct mapping_area *= area, sizes[1] =3D size - sizes[0]; =20 /* copy per-cpu buffer to object */ - addr =3D kmap_atomic(pages[0]); + addr =3D zpdesc_kmap_atomic(zpdescs[0]); memcpy(addr + off, buf, sizes[0]); kunmap_atomic(addr); - addr =3D kmap_atomic(pages[1]); + addr =3D zpdesc_kmap_atomic(zpdescs[1]); memcpy(addr, buf + sizes[0], sizes[1]); kunmap_atomic(addr); =20 @@ -1252,7 +1257,7 @@ void *zs_map_object(struct zs_pool *pool, unsigned lo= ng handle, pages[1] =3D get_next_page(page); BUG_ON(!pages[1]); =20 - ret =3D __zs_map_object(area, pages, off, class->size); + ret =3D __zs_map_object(area, (struct zpdesc **)pages, off, class->size); out: if (likely(!ZsHugePage(zspage))) ret +=3D ZS_HANDLE_SIZE; @@ -1287,7 +1292,7 @@ void zs_unmap_object(struct zs_pool *pool, unsigned l= ong handle) pages[1] =3D get_next_page(page); BUG_ON(!pages[1]); =20 - __zs_unmap_object(area, pages, off, class->size); + __zs_unmap_object(area, (struct zpdesc **)pages, off, class->size); } local_unlock(&zs_map_area.lock); =20 --=20 2.43.0