From patchwork Wed Jun 19 19:33:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kees Cook X-Patchwork-Id: 13704472 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 11978155759; Wed, 19 Jun 2024 19:33:57 +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=1718825638; cv=none; b=cwK4McwYrzAiJwSq2ZD/XH21qmAZUGk59QGeLUmnTtr4/Yl8r0Jv0jXfW4/v4RGKfo4vHwzEHUNxl9+37p5/1RHmKM4JAiJ9zhArUU/VWrbehIUl5OyeYyO0+XxOuJPIWSgCBtAhZh91jdmC0ctPSW1mMbPTk4cL9eXexyE4/Gc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718825638; c=relaxed/simple; bh=jbXDHZFgMTEqVuIbGpjVHki9R28/opuEqbu8dA+PhS0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ocvNig5MeyxMT5aMn7Pob4T0T6Yjb8nFYWdmoWb3gPsAVqaPJnq6b0BBXxcvhKVhE+550Bfe+N4gg+EfHMDYxkD39jBjb4cyD6eg1Y3R9P8wKoduF1tWufmP5BOUMqwncYGqjhSIx7vvXTYWvAFhV8D0wfJqWFLp2Dn5rg/fRxc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BCyQBt5W; 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="BCyQBt5W" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A50BDC4AF08; Wed, 19 Jun 2024 19:33:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1718825637; bh=jbXDHZFgMTEqVuIbGpjVHki9R28/opuEqbu8dA+PhS0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BCyQBt5W1LB+VIF0YRwWomc9oJnTKvhC4csl7t1FMqLzr79+LCzMZ4GfPx8Bjh64c K5A5x5XbgSx5bgRgdJgtfY+lYnkb6uee9IXIWSJq2FAtOvKwmMk2w5rYr6qbEb/nMh t+0gx1Sef/GMlGPyl/jpTXLHHwqH5h2rPL3mPe8HNZrXFJKXE0/mz5/9OnvGTG1QFj CCb8pT3aO3iucUMGBBD+k7BbUpejJRBIqxb7hTUa3H77t576ojcEVt9ITWRL832ZtH +kDguxYTHditwu84pRw6xbaV/NsenVniruEylET1/8p1QmUYSru3OQ9+5iIBWPKe6F GgEkkm9+qdgeA== From: Kees Cook To: Vlastimil Babka Cc: Kees Cook , "GONG, Ruiqi" , Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , jvoisin , Andrew Morton , Roman Gushchin , Hyeonggon Yoo <42.hyeyoo@gmail.com>, Xiu Jianfeng , Suren Baghdasaryan , Kent Overstreet , Jann Horn , Matteo Rizzo , Thomas Graf , Herbert Xu , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-hardening@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v5 1/6] mm/slab: Introduce kmem_buckets typedef Date: Wed, 19 Jun 2024 12:33:49 -0700 Message-Id: <20240619193357.1333772-1-kees@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240619192131.do.115-kees@kernel.org> References: <20240619192131.do.115-kees@kernel.org> Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1406; i=kees@kernel.org; h=from:subject; bh=jbXDHZFgMTEqVuIbGpjVHki9R28/opuEqbu8dA+PhS0=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBmczKh6T8pqxaDs77JF9cx/6sa+j5FaKjCYQYlt 8Av1OrjnquJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZnMyoQAKCRCJcvTf3G3A JnDmD/4lPT3IQnslSsmLm0/93PDrMo6dacPrg3fO6iYYge5SRvS8tMrXtla/rIN7FC2Vv9yTvN8 3aMsnyY8X5gSVBi6NnUdOanCs2w+MziAmdDjP4Gaevg1LQRWCzOfOak5shXpArYv+qoZdPw0Ttt LD1n9zWURQ830r1QQ/RiHGcwhlQNTeHINjMW18GIve5hEb2ZaV19FJPBMQP6GyIMeboDi5Zy0m/ RiXCicXZkU2K/T6W7jvQfVD85odLnhPoVFL98TUkeaPAn2aBj54T6GgYlPyc4B1N07E2F7TfLiy OfVAoefI78Tcp2cB03HV8piNNGzhTPM+siCg8NfUxReQDbmLjmWDYw0cPwbZBLrPP+xZ+1vvP0J wmve26MopNZXLnm6/NWvBZQs4gQxk/7OUINSKKWjdRYwClbZWqq0iqM+jyoeuaHxGeb5tpNYp9M FHMNBNVA95dzB3FexZlV/JwN2CkvN4ZnJd163nXWHOHdkxwPQSZcT7/uB1h7U1LJb1urQasc4Pj NUiE6wks+0i9AhkcnSPdNbCqXJMzNe7e9vTU2fFtj6CnSGGGha+HRGmubAwnN7u1F0tTw7tujn+ J+njOxDXJY1DPMy0lGGI+GwZY+8vnPIeWOLFnRXSn/4ph5gnyx7KOyiXxIkxiLJTt5dJbbJJHZF pcTcJxJ0nTDzcHQ== X-Developer-Key: i=kees@kernel.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Encapsulate the concept of a single set of kmem_caches that are used for the kmalloc size buckets. Redefine kmalloc_caches as an array of these buckets (for the different global cache buckets). Signed-off-by: Kees Cook --- include/linux/slab.h | 5 +++-- mm/slab_common.c | 3 +-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/include/linux/slab.h b/include/linux/slab.h index ed6bee5ec2b6..8a006fac57c6 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -426,8 +426,9 @@ enum kmalloc_cache_type { NR_KMALLOC_TYPES }; -extern struct kmem_cache * -kmalloc_caches[NR_KMALLOC_TYPES][KMALLOC_SHIFT_HIGH + 1]; +typedef struct kmem_cache * kmem_buckets[KMALLOC_SHIFT_HIGH + 1]; + +extern kmem_buckets kmalloc_caches[NR_KMALLOC_TYPES]; /* * Define gfp bits that should not be set for KMALLOC_NORMAL. diff --git a/mm/slab_common.c b/mm/slab_common.c index 1560a1546bb1..e0b1c109bed2 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -653,8 +653,7 @@ static struct kmem_cache *__init create_kmalloc_cache(const char *name, return s; } -struct kmem_cache * -kmalloc_caches[NR_KMALLOC_TYPES][KMALLOC_SHIFT_HIGH + 1] __ro_after_init = +kmem_buckets kmalloc_caches[NR_KMALLOC_TYPES] __ro_after_init = { /* initialization for https://llvm.org/pr42570 */ }; EXPORT_SYMBOL(kmalloc_caches);