From nobody Sun Feb 8 17:43:15 2026 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 717E717B427 for ; Tue, 13 Aug 2024 08:41:18 +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=1723538478; cv=none; b=njEkgzRgWFN1UpNbLk9maTL7378AlKz9X61y4Y27/U/ixiIO7W/xWTHhtr2J8lpMo4LQn54HZrWkoN/9ju5WYrKKWMljvsuWFM/TZHktB+pGm9w6NUG3jPuk69BvkP/5HK7hf4r4wedZH1UHft2uqzpRtnhkoekMIo97K/oyS6M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723538478; c=relaxed/simple; bh=rMm13SX4aLf3oZ/lBmcjJeeV3CGO+2RCAQN5DP+xGmo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=APwSJUJRdl1+lWivwuFoF7BRXUwL86zLyEY7CEr4le7CcJHXFepuafmUbaIRETLdXuqS0Nq+pZdvtK+nATeg29N59v4SiMp7HsknGvIpAmhRHheQWFzA7ynKcld2UYd1pOLGm4KgT+m9qz02qiBkptDvE5ZO87bbLGGOTHNTYFk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jJgXG5/M; 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="jJgXG5/M" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D74FCC4AF0B; Tue, 13 Aug 2024 08:41:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723538478; bh=rMm13SX4aLf3oZ/lBmcjJeeV3CGO+2RCAQN5DP+xGmo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jJgXG5/MU5u93XZsl+G9CJ0mZ5Zsa5hW1D87/ECOlkqHb+Sr7/6G9JpU9JSleiaMM jeO2UHtuI8wPWRVqLVhxb3dyjcW8uiCm+Wre+EoFb8xV3wGDYcMFKa9RWetwLmAfpW 7wGshauiHkGZQEFx7I7wSWteKnO22jVG7YHziDbs66qRtrx9x/JGYl0r8S9g0dUrhw pe6jnDZAoZToI0zoFrugdc2rA141iOVEivfjDwK26VKKJn39xFkNkKoNQ5vYFHKL5I V1bo7H8J9Swu0EPIh8U+xtQC+GvyGGiBC1koj5PQ+iVCqihCzllNAuur2U0FggB05u phlueemlWNrtw== 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 v6 03/21] mm/zsmalloc: convert __zs_map_object/__zs_unmap_object to use zpdesc Date: Tue, 13 Aug 2024 16:45:49 +0800 Message-ID: <20240813084611.4122571-4-alexs@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240813084611.4122571-1-alexs@kernel.org> References: <20240813084611.4122571-1-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 25c90224f21f..b9b5e2824f2c 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