linux-kernel - [RFC PATCH 28/28] memremap: Remove PCI P2PDMA page memory type

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Date:   Thu, 20 Jun 2019 10:12:40 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-nvme@...ts.infradead.org, linux-pci@...r.kernel.org,
        linux-rdma@...r.kernel.org
Cc:     Jens Axboe <axboe@...nel.dk>, Christoph Hellwig <hch@....de>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Keith Busch <kbusch@...nel.org>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Stephen Bates <sbates@...thlin.com>,
        Logan Gunthorpe <logang@...tatee.com>
Subject: [RFC PATCH 28/28] memremap: Remove PCI P2PDMA page memory type

There are no more users of MEMORY_DEVICE_PCI_P2PDMA and
is_pci_p2pdma_page(), so remove them.

Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
---
 include/linux/memremap.h |  5 -----
 include/linux/mm.h       | 13 -------------
 2 files changed, 18 deletions(-)

diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index 1732dea030b2..2e5d9fcd4d69 100644
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -51,16 +51,11 @@ struct vmem_altmap {
  * wakeup event whenever a page is unpinned and becomes idle. This
  * wakeup is used to coordinate physical address space management (ex:
  * fs truncate/hole punch) vs pinned pages (ex: device dma).
- *
- * MEMORY_DEVICE_PCI_P2PDMA:
- * Device memory residing in a PCI BAR intended for use with Peer-to-Peer
- * transactions.
  */
 enum memory_type {
 	MEMORY_DEVICE_PRIVATE = 1,
 	MEMORY_DEVICE_PUBLIC,
 	MEMORY_DEVICE_FS_DAX,
-	MEMORY_DEVICE_PCI_P2PDMA,
 };
 
 /*
diff --git a/include/linux/mm.h b/include/linux/mm.h
index dd0b5f4e1e45..f5fa9ec440e3 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -966,19 +966,6 @@ static inline bool is_device_public_page(const struct page *page)
 		page->pgmap->type == MEMORY_DEVICE_PUBLIC;
 }
 
-#ifdef CONFIG_PCI_P2PDMA
-static inline bool is_pci_p2pdma_page(const struct page *page)
-{
-	return is_zone_device_page(page) &&
-		page->pgmap->type == MEMORY_DEVICE_PCI_P2PDMA;
-}
-#else /* CONFIG_PCI_P2PDMA */
-static inline bool is_pci_p2pdma_page(const struct page *page)
-{
-	return false;
-}
-#endif /* CONFIG_PCI_P2PDMA */
-
 #else /* CONFIG_DEV_PAGEMAP_OPS */
 static inline void dev_pagemap_get_ops(void)
 {
-- 
2.20.1