From mboxrd@z Thu Jan 1 00:00:00 1970 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 4CC11363090; Mon, 23 Mar 2026 07:49:23 +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=1774252164; cv=none; b=HhZ2XFO9SXtYMM/66hTJL1Ohy9NgsyEIb0/K6Xw0VIdfWIrjGa400RNbnRlue2CUwLYQfjIllMQD31OVt8eL2v0X8Qbk8Nuujw7Z8B61rQH5e0RVGg9N+qE/Ktq3I2LCSGEPHq/snzq1RN/mK14qZMnfry2P4Oiq59PHyFNzcO4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774252164; c=relaxed/simple; bh=H66xl/BIJkTq28ukNF8WEu/fNAsPeeebsB5A/nwWYaQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oAzKc21/oTyCm+hmKhGKiFf8xK+8Kt0Id4VyX4OR+jm0oJp++CSElXKPKF3k33vya8c/b6vp5MZ5o3I5ScPe9PoOt7d5YIFYWMd0OdX0Tob8AJ4dxkRSExqvb6wdX8TOUQjKMSOio+egmVzknYJpWDrWMvqteduXquJQmNKytSk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=I5My3+MQ; 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="I5My3+MQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3804AC4CEF7; Mon, 23 Mar 2026 07:49:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774252163; bh=H66xl/BIJkTq28ukNF8WEu/fNAsPeeebsB5A/nwWYaQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=I5My3+MQvuPzdJ/eqnURHDufO2mFAIraPI31J+w/BDj7mSnOzz+bBSQ1nkIe6BHbp XVpJh7sZx9NFenINTf9GYQ137cP6vq3WlrCC8bnp6YDsHPgO8DCjw+QUFpZuyiQRev 4ZiDp6rsouY8nD13d6IOzKlDukyiP/rqJ1UKAgnZiOiYzFhPGMGLMTbUTFoLqAqxjQ tmiRSnujVaLodu+eJjuLWv5yflUsq2SZE3WtD7/jj+hDdLQLtnmbP8EpnzzEK7QIi7 D0NRQA1iQ/GFpfYatJJU9GNNL+T6vp+PtI6c81WogxjFBeSkYizd+xg4X95TFNbYpb 0iF2JqU+gfR1g== From: Mike Rapoport To: Andrew Morton Cc: Alexander Potapenko , Alexander Viro , Andreas Larsson , Ard Biesheuvel , Borislav Petkov , Brendan Jackman , "Christophe Leroy (CS GROUP)" , Catalin Marinas , Christian Brauner , "David S. Miller" , Dave Hansen , David Hildenbrand , Dmitry Vyukov , Ilias Apalodimas , Ingo Molnar , Jan Kara , Johannes Weiner , "Liam R. Howlett" , Lorenzo Stoakes , Madhavan Srinivasan , Marco Elver , Marek Szyprowski , Masami Hiramatsu , Michael Ellerman , Michal Hocko , Mike Rapoport , Nicholas Piggin , "H. Peter Anvin" , Rob Herring , Robin Murphy , Saravana Kannan , Suren Baghdasaryan , Thomas Gleixner , Vlastimil Babka , Will Deacon , Zi Yan , devicetree@vger.kernel.org, iommu@lists.linux.dev, kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-efi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH v2 3/9] powerpc: opal-core: pair alloc_pages_exact() with free_pages_exact() Date: Mon, 23 Mar 2026 09:48:30 +0200 Message-ID: <20260323074836.3653702-4-rppt@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260323074836.3653702-1-rppt@kernel.org> References: <20260323074836.3653702-1-rppt@kernel.org> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: "Mike Rapoport (Microsoft)" opal-core allocates buffers with alloc_pages_exact(), but then marks them as reserved and frees using free_reserved_area(). This is completely unnecessary and the pages allocated with alloc_pages_exact() can be naturally freed with free_pages_exact(). Replace freeing of memory in opalcore_cleanup() with free_pages_exact() and simplify allocation code so that it won't mark allocated pages as reserved. Signed-off-by: Mike Rapoport (Microsoft) --- arch/powerpc/platforms/powernv/opal-core.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) diff --git a/arch/powerpc/platforms/powernv/opal-core.c b/arch/powerpc/platforms/powernv/opal-core.c index e76e462f55f6..32662d30d70f 100644 --- a/arch/powerpc/platforms/powernv/opal-core.c +++ b/arch/powerpc/platforms/powernv/opal-core.c @@ -303,7 +303,6 @@ static int __init create_opalcore(void) struct device_node *dn; struct opalcore *new; loff_t opalcore_off; - struct page *page; Elf64_Phdr *phdr; Elf64_Ehdr *elf; int i, ret; @@ -328,11 +327,6 @@ static int __init create_opalcore(void) oc_conf->opalcorebuf_sz = 0; return -ENOMEM; } - count = oc_conf->opalcorebuf_sz / PAGE_SIZE; - page = virt_to_page(oc_conf->opalcorebuf); - for (i = 0; i < count; i++) - mark_page_reserved(page + i); - pr_debug("opalcorebuf = 0x%llx\n", (u64)oc_conf->opalcorebuf); /* Read OPAL related device-tree entries */ @@ -437,10 +431,7 @@ static void opalcore_cleanup(void) /* free the buffer used for setting up OPAL core */ if (oc_conf->opalcorebuf) { - void *end = (void *)((u64)oc_conf->opalcorebuf + - oc_conf->opalcorebuf_sz); - - free_reserved_area(oc_conf->opalcorebuf, end, -1, NULL); + free_pages_exact(oc_conf->opalcorebuf, oc_conf->opalcorebuf_sz); oc_conf->opalcorebuf = NULL; oc_conf->opalcorebuf_sz = 0; } -- 2.53.0