From patchwork Thu Feb 10 07:28:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12741467 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 A5BA62F4C for ; Thu, 10 Feb 2022 07:29:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=nwQK8rTzBeKvGcrtCRWh1dh2jjlfr7yyGwSU0Am+w+s=; b=HpIhsMcgR2ml6ZX6xWqvoyf1/O JYbbjkJeGj+Vr2y7NNas0msPbsv7XIDfhYm/ASJ2vOYm9xc+NnDrDB5b9TDYBwhApZnQ8388w+VMC oV4R477KDNIdE8Lctpl7xV0S2GA4ZImCbTINY00BJFrJRL2sZxyRSw/y+xxkn1mK9yZh5vDkDDfJ7 yE7oQ92FoD5PiopPrvkomGyl+xLc+e56mzByFPCIS0GaxRV2G2ppPSXe8bJsNC+nc+AlDD7noP8qw 9ZyBl+/C/fiuzpkjde64hfsOYBI43MFjAHA922mCys8kjTfXl5CJIxWQRspbVqIlB6t/25F45NZLI YoiVjs8w==; Received: from [2001:4bb8:188:3efc:8014:b2f2:fdfd:57ea] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nI3su-002rtD-Me; Thu, 10 Feb 2022 07:28:57 +0000 From: Christoph Hellwig To: Andrew Morton , Dan Williams Cc: Felix Kuehling , Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , "Pan, Xinhui" , Ben Skeggs , Karol Herbst , Lyude Paul , Jason Gunthorpe , Alistair Popple , Logan Gunthorpe , Ralph Campbell , linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, nvdimm@lists.linux.dev, linux-mm@kvack.org Subject: [PATCH 09/27] mm: generalize the pgmap based page_free infrastructure Date: Thu, 10 Feb 2022 08:28:10 +0100 Message-Id: <20220210072828.2930359-10-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220210072828.2930359-1-hch@lst.de> References: <20220210072828.2930359-1-hch@lst.de> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Key off on the existence of ->page_free to prepare for adding support for more pgmap types that are device managed and thus need the free callback. Signed-off-by: Christoph Hellwig Reviewed-by: Logan Gunthorpe --- mm/memremap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/memremap.c b/mm/memremap.c index fef5734d5e4933..e00ffcdba7b632 100644 --- a/mm/memremap.c +++ b/mm/memremap.c @@ -452,7 +452,7 @@ EXPORT_SYMBOL_GPL(get_dev_pagemap); void free_zone_device_page(struct page *page) { - if (WARN_ON_ONCE(!is_device_private_page(page))) + if (WARN_ON_ONCE(!page->pgmap->ops || !page->pgmap->ops->page_free)) return; __ClearPageWaiters(page); @@ -460,7 +460,7 @@ void free_zone_device_page(struct page *page) mem_cgroup_uncharge(page_folio(page)); /* - * When a device_private page is freed, the page->mapping field + * When a device managed page is freed, the page->mapping field * may still contain a (stale) mapping value. For example, the * lower bits of page->mapping may still identify the page as an * anonymous page. Ultimately, this entire field is just stale