Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1686926 > unrolled thread

[PATCH 1/6] mm/zone-device: rename DEVICE_PUBLIC to DEVICE_HOST

Back to article view | Back to linux.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  [PATCH 1/6] mm/zone-device: rename DEVICE_PUBLIC to DEVICE_HOST Jérôme Glisse <jglisse@redhat.com> - 2017-07-13 23:20 +0200
    Re: [PATCH 1/6] mm/zone-device: rename DEVICE_PUBLIC to DEVICE_HOST Balbir Singh <bsingharora@gmail.com> - 2017-07-17 11:20 +0200

#1686926 — [PATCH 1/6] mm/zone-device: rename DEVICE_PUBLIC to DEVICE_HOST

Existing user of ZONE_DEVICE in its DEVICE_PUBLIC variant are not tie
to specific device and behave more like host memory. This patch rename
DEVICE_PUBLIC to DEVICE_HOST and free the name DEVICE_PUBLIC to be use
for cache coherent device memory that has strong tie with the device
on which the memory is (for instance on board GPU memory).

There is no functional change here.

Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
---
 include/linux/memremap.h | 4 ++--
 kernel/memremap.c        | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index 57546a07a558..ae5ff92f72b4 100644
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -41,7 +41,7 @@ static inline struct vmem_altmap *to_vmem_altmap(unsigned long memmap_start)
  * Specialize ZONE_DEVICE memory into multiple types each having differents
  * usage.
  *
- * MEMORY_DEVICE_PUBLIC:
+ * MEMORY_DEVICE_HOST:
  * Persistent device memory (pmem): struct page might be allocated in different
  * memory and architecture might want to perform special actions. It is similar
  * to regular memory, in that the CPU can access it transparently. However,
@@ -59,7 +59,7 @@ static inline struct vmem_altmap *to_vmem_altmap(unsigned long memmap_start)
  * include/linux/hmm.h and Documentation/vm/hmm.txt.
  */
 enum memory_type {
-	MEMORY_DEVICE_PUBLIC = 0,
+	MEMORY_DEVICE_HOST = 0,
 	MEMORY_DEVICE_PRIVATE,
 };
 
diff --git a/kernel/memremap.c b/kernel/memremap.c
index b9baa6c07918..4e07525aa273 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -350,7 +350,7 @@ void *devm_memremap_pages(struct device *dev, struct resource *res,
 	}
 	pgmap->ref = ref;
 	pgmap->res = &page_map->res;
-	pgmap->type = MEMORY_DEVICE_PUBLIC;
+	pgmap->type = MEMORY_DEVICE_HOST;
 	pgmap->page_fault = NULL;
 	pgmap->page_free = NULL;
 	pgmap->data = NULL;
-- 
2.13.0

[toc] | [next] | [standalone]

#1688800

On Thu, 2017-07-13 at 17:15 -0400, Jérôme Glisse wrote:
> Existing user of ZONE_DEVICE in its DEVICE_PUBLIC variant are not tie
> to specific device and behave more like host memory. This patch rename
> DEVICE_PUBLIC to DEVICE_HOST and free the name DEVICE_PUBLIC to be use
> for cache coherent device memory that has strong tie with the device
> on which the memory is (for instance on board GPU memory).
> 
> There is no functional change here.
> 
> Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
> Cc: Dan Williams <dan.j.williams@intel.com>
> Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
> ---

Acked-by: Balbir Singh <bsingharora@gmail.com>

[toc] | [prev] | [standalone]

Back to top | Article view | linux.kernel

csiph-web