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* [PATCH 1/2] mm: Add and export vmf_insert_mixed_prot()
@ 2019-11-26 20:27 Thomas Hellström (VMware)
  2019-11-26 20:27 ` [PATCH 2/2] drm/ttm: Fix vm page protection handling Thomas Hellström (VMware)
  2019-11-27  8:42 ` [PATCH 1/2] mm: Add and export vmf_insert_mixed_prot() Christian König
  0 siblings, 2 replies; 5+ messages in thread
From: Thomas Hellström (VMware) @ 2019-11-26 20:27 UTC (permalink / raw)
  To: dri-devel, linux-mm, linux-kernel, linux-graphics-maintainer
  Cc: Thomas Hellstrom, Andrew Morton, Michal Hocko,
	Matthew Wilcox (Oracle),
	Kirill A. Shutemov, Ralph Campbell, Jérôme Glisse,
	Christian König

From: Thomas Hellstrom <thellstrom@vmware.com>

The TTM module today uses a hack to be able to set a different page
protection than struct vm_area_struct::vm_page_prot. To be able to do
this properly, add and export vmf_insert_mixed_prot().

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: "Christian König" <christian.koenig@amd.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
---
 include/linux/mm.h |  2 ++
 mm/memory.c        | 15 +++++++++++----
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index cc292273e6ba..29575d3c1e47 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2548,6 +2548,8 @@ vm_fault_t vmf_insert_pfn_prot(struct vm_area_struct *vma, unsigned long addr,
 			unsigned long pfn, pgprot_t pgprot);
 vm_fault_t vmf_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
 			pfn_t pfn);
+vm_fault_t vmf_insert_mixed_prot(struct vm_area_struct *vma, unsigned long addr,
+			pfn_t pfn, pgprot_t pgprot);
 vm_fault_t vmf_insert_mixed_mkwrite(struct vm_area_struct *vma,
 		unsigned long addr, pfn_t pfn);
 int vm_iomap_memory(struct vm_area_struct *vma, phys_addr_t start, unsigned long len);
diff --git a/mm/memory.c b/mm/memory.c
index b1ca51a079f2..28f162e28144 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1719,9 +1719,9 @@ static bool vm_mixed_ok(struct vm_area_struct *vma, pfn_t pfn)
 }
 
 static vm_fault_t __vm_insert_mixed(struct vm_area_struct *vma,
-		unsigned long addr, pfn_t pfn, bool mkwrite)
+		unsigned long addr, pfn_t pfn, pgprot_t pgprot,
+		bool mkwrite)
 {
-	pgprot_t pgprot = vma->vm_page_prot;
 	int err;
 
 	BUG_ON(!vm_mixed_ok(vma, pfn));
@@ -1764,10 +1764,17 @@ static vm_fault_t __vm_insert_mixed(struct vm_area_struct *vma,
 	return VM_FAULT_NOPAGE;
 }
 
+vm_fault_t vmf_insert_mixed_prot(struct vm_area_struct *vma, unsigned long addr,
+				 pfn_t pfn, pgprot_t pgprot)
+{
+	return __vm_insert_mixed(vma, addr, pfn, pgprot, false);
+}
+EXPORT_SYMBOL(vmf_insert_mixed_prot);
+
 vm_fault_t vmf_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
 		pfn_t pfn)
 {
-	return __vm_insert_mixed(vma, addr, pfn, false);
+	return __vm_insert_mixed(vma, addr, pfn, vma->vm_page_prot, false);
 }
 EXPORT_SYMBOL(vmf_insert_mixed);
 
@@ -1779,7 +1786,7 @@ EXPORT_SYMBOL(vmf_insert_mixed);
 vm_fault_t vmf_insert_mixed_mkwrite(struct vm_area_struct *vma,
 		unsigned long addr, pfn_t pfn)
 {
-	return __vm_insert_mixed(vma, addr, pfn, true);
+	return __vm_insert_mixed(vma, addr, pfn, vma->vm_page_prot, true);
 }
 EXPORT_SYMBOL(vmf_insert_mixed_mkwrite);
 
-- 
2.21.0



^ permalink raw reply	[flat|nested] 5+ messages in thread

* [PATCH 2/2] drm/ttm: Fix vm page protection handling
  2019-11-26 20:27 [PATCH 1/2] mm: Add and export vmf_insert_mixed_prot() Thomas Hellström (VMware)
@ 2019-11-26 20:27 ` Thomas Hellström (VMware)
  2019-11-27  8:43   ` Christian König
  2019-11-27  8:42 ` [PATCH 1/2] mm: Add and export vmf_insert_mixed_prot() Christian König
  1 sibling, 1 reply; 5+ messages in thread
From: Thomas Hellström (VMware) @ 2019-11-26 20:27 UTC (permalink / raw)
  To: dri-devel, linux-mm, linux-kernel, linux-graphics-maintainer
  Cc: Thomas Hellstrom, Andrew Morton, Michal Hocko,
	Matthew Wilcox (Oracle),
	Kirill A. Shutemov, Ralph Campbell, Jérôme Glisse,
	Christian König

From: Thomas Hellstrom <thellstrom@vmware.com>

We were using an ugly hack to set the page protection correctly.
Fix that and instead use vmf_insert_mixed_prot() and / or
vmf_insert_pfn_prot().
Also get the default page protection from
struct vm_area_struct::vm_page_prot rather than using vm_get_page_prot().
This way we catch modifications done by the vm system for drivers that
want write-notification.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: "Christian König" <christian.koenig@amd.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
---
 drivers/gpu/drm/ttm/ttm_bo_vm.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index e6495ca2630b..2098f8d4dfc5 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -173,7 +173,6 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
 				    pgoff_t num_prefault)
 {
 	struct vm_area_struct *vma = vmf->vma;
-	struct vm_area_struct cvma = *vma;
 	struct ttm_buffer_object *bo = vma->vm_private_data;
 	struct ttm_bo_device *bdev = bo->bdev;
 	unsigned long page_offset;
@@ -244,7 +243,7 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
 		goto out_io_unlock;
 	}
 
-	cvma.vm_page_prot = ttm_io_prot(bo->mem.placement, prot);
+	prot = ttm_io_prot(bo->mem.placement, prot);
 	if (!bo->mem.bus.is_iomem) {
 		struct ttm_operation_ctx ctx = {
 			.interruptible = false,
@@ -260,7 +259,7 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
 		}
 	} else {
 		/* Iomem should not be marked encrypted */
-		cvma.vm_page_prot = pgprot_decrypted(cvma.vm_page_prot);
+		prot = pgprot_decrypted(prot);
 	}
 
 	/*
@@ -284,10 +283,11 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
 		}
 
 		if (vma->vm_flags & VM_MIXEDMAP)
-			ret = vmf_insert_mixed(&cvma, address,
-					__pfn_to_pfn_t(pfn, PFN_DEV));
+			ret = vmf_insert_mixed_prot(vma, address,
+						    __pfn_to_pfn_t(pfn, PFN_DEV),
+						    prot);
 		else
-			ret = vmf_insert_pfn(&cvma, address, pfn);
+			ret = vmf_insert_pfn_prot(vma, address, pfn, prot);
 
 		/* Never error on prefaulted PTEs */
 		if (unlikely((ret & VM_FAULT_ERROR))) {
@@ -319,7 +319,7 @@ vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf)
 	if (ret)
 		return ret;
 
-	prot = vm_get_page_prot(vma->vm_flags);
+	prot = vma->vm_page_prot;
 	ret = ttm_bo_vm_fault_reserved(vmf, prot, TTM_BO_VM_NUM_PREFAULT);
 	if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT))
 		return ret;
-- 
2.21.0



^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [PATCH 1/2] mm: Add and export vmf_insert_mixed_prot()
  2019-11-26 20:27 [PATCH 1/2] mm: Add and export vmf_insert_mixed_prot() Thomas Hellström (VMware)
  2019-11-26 20:27 ` [PATCH 2/2] drm/ttm: Fix vm page protection handling Thomas Hellström (VMware)
@ 2019-11-27  8:42 ` Christian König
  1 sibling, 0 replies; 5+ messages in thread
From: Christian König @ 2019-11-27  8:42 UTC (permalink / raw)
  To: Thomas Hellström (VMware),
	dri-devel, linux-mm, linux-kernel, linux-graphics-maintainer
  Cc: Thomas Hellstrom, Andrew Morton, Michal Hocko,
	Matthew Wilcox (Oracle),
	Kirill A. Shutemov, Ralph Campbell, Jérôme Glisse

Am 26.11.19 um 21:27 schrieb Thomas Hellström (VMware):
> From: Thomas Hellstrom <thellstrom@vmware.com>
>
> The TTM module today uses a hack to be able to set a different page
> protection than struct vm_area_struct::vm_page_prot. To be able to do
> this properly, add and export vmf_insert_mixed_prot().
>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Michal Hocko <mhocko@suse.com>
> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
> Cc: Ralph Campbell <rcampbell@nvidia.com>
> Cc: "Jérôme Glisse" <jglisse@redhat.com>
> Cc: "Christian König" <christian.koenig@amd.com>
> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>

Acked-by: Christian König <christian.koenig@amd.com>

> ---
>   include/linux/mm.h |  2 ++
>   mm/memory.c        | 15 +++++++++++----
>   2 files changed, 13 insertions(+), 4 deletions(-)
>
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index cc292273e6ba..29575d3c1e47 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2548,6 +2548,8 @@ vm_fault_t vmf_insert_pfn_prot(struct vm_area_struct *vma, unsigned long addr,
>   			unsigned long pfn, pgprot_t pgprot);
>   vm_fault_t vmf_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
>   			pfn_t pfn);
> +vm_fault_t vmf_insert_mixed_prot(struct vm_area_struct *vma, unsigned long addr,
> +			pfn_t pfn, pgprot_t pgprot);
>   vm_fault_t vmf_insert_mixed_mkwrite(struct vm_area_struct *vma,
>   		unsigned long addr, pfn_t pfn);
>   int vm_iomap_memory(struct vm_area_struct *vma, phys_addr_t start, unsigned long len);
> diff --git a/mm/memory.c b/mm/memory.c
> index b1ca51a079f2..28f162e28144 100644
> --- a/mm/memory.c
> +++ b/mm/memory.c
> @@ -1719,9 +1719,9 @@ static bool vm_mixed_ok(struct vm_area_struct *vma, pfn_t pfn)
>   }
>   
>   static vm_fault_t __vm_insert_mixed(struct vm_area_struct *vma,
> -		unsigned long addr, pfn_t pfn, bool mkwrite)
> +		unsigned long addr, pfn_t pfn, pgprot_t pgprot,
> +		bool mkwrite)
>   {
> -	pgprot_t pgprot = vma->vm_page_prot;
>   	int err;
>   
>   	BUG_ON(!vm_mixed_ok(vma, pfn));
> @@ -1764,10 +1764,17 @@ static vm_fault_t __vm_insert_mixed(struct vm_area_struct *vma,
>   	return VM_FAULT_NOPAGE;
>   }
>   
> +vm_fault_t vmf_insert_mixed_prot(struct vm_area_struct *vma, unsigned long addr,
> +				 pfn_t pfn, pgprot_t pgprot)
> +{
> +	return __vm_insert_mixed(vma, addr, pfn, pgprot, false);
> +}
> +EXPORT_SYMBOL(vmf_insert_mixed_prot);
> +
>   vm_fault_t vmf_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
>   		pfn_t pfn)
>   {
> -	return __vm_insert_mixed(vma, addr, pfn, false);
> +	return __vm_insert_mixed(vma, addr, pfn, vma->vm_page_prot, false);
>   }
>   EXPORT_SYMBOL(vmf_insert_mixed);
>   
> @@ -1779,7 +1786,7 @@ EXPORT_SYMBOL(vmf_insert_mixed);
>   vm_fault_t vmf_insert_mixed_mkwrite(struct vm_area_struct *vma,
>   		unsigned long addr, pfn_t pfn)
>   {
> -	return __vm_insert_mixed(vma, addr, pfn, true);
> +	return __vm_insert_mixed(vma, addr, pfn, vma->vm_page_prot, true);
>   }
>   EXPORT_SYMBOL(vmf_insert_mixed_mkwrite);
>   



^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [PATCH 2/2] drm/ttm: Fix vm page protection handling
  2019-11-26 20:27 ` [PATCH 2/2] drm/ttm: Fix vm page protection handling Thomas Hellström (VMware)
@ 2019-11-27  8:43   ` Christian König
  0 siblings, 0 replies; 5+ messages in thread
From: Christian König @ 2019-11-27  8:43 UTC (permalink / raw)
  To: Thomas Hellström (VMware),
	dri-devel, linux-mm, linux-kernel, linux-graphics-maintainer
  Cc: Thomas Hellstrom, Andrew Morton, Michal Hocko,
	Matthew Wilcox (Oracle),
	Kirill A. Shutemov, Ralph Campbell, Jérôme Glisse

Am 26.11.19 um 21:27 schrieb Thomas Hellström (VMware):
> From: Thomas Hellstrom <thellstrom@vmware.com>
>
> We were using an ugly hack to set the page protection correctly.
> Fix that and instead use vmf_insert_mixed_prot() and / or
> vmf_insert_pfn_prot().
> Also get the default page protection from
> struct vm_area_struct::vm_page_prot rather than using vm_get_page_prot().
> This way we catch modifications done by the vm system for drivers that
> want write-notification.
>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Michal Hocko <mhocko@suse.com>
> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
> Cc: Ralph Campbell <rcampbell@nvidia.com>
> Cc: "Jérôme Glisse" <jglisse@redhat.com>
> Cc: "Christian König" <christian.koenig@amd.com>
> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>

Reviewed-by: Christian König <christian.koenig@amd.com>

> ---
>   drivers/gpu/drm/ttm/ttm_bo_vm.c | 14 +++++++-------
>   1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
> index e6495ca2630b..2098f8d4dfc5 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
> @@ -173,7 +173,6 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
>   				    pgoff_t num_prefault)
>   {
>   	struct vm_area_struct *vma = vmf->vma;
> -	struct vm_area_struct cvma = *vma;
>   	struct ttm_buffer_object *bo = vma->vm_private_data;
>   	struct ttm_bo_device *bdev = bo->bdev;
>   	unsigned long page_offset;
> @@ -244,7 +243,7 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
>   		goto out_io_unlock;
>   	}
>   
> -	cvma.vm_page_prot = ttm_io_prot(bo->mem.placement, prot);
> +	prot = ttm_io_prot(bo->mem.placement, prot);
>   	if (!bo->mem.bus.is_iomem) {
>   		struct ttm_operation_ctx ctx = {
>   			.interruptible = false,
> @@ -260,7 +259,7 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
>   		}
>   	} else {
>   		/* Iomem should not be marked encrypted */
> -		cvma.vm_page_prot = pgprot_decrypted(cvma.vm_page_prot);
> +		prot = pgprot_decrypted(prot);
>   	}
>   
>   	/*
> @@ -284,10 +283,11 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
>   		}
>   
>   		if (vma->vm_flags & VM_MIXEDMAP)
> -			ret = vmf_insert_mixed(&cvma, address,
> -					__pfn_to_pfn_t(pfn, PFN_DEV));
> +			ret = vmf_insert_mixed_prot(vma, address,
> +						    __pfn_to_pfn_t(pfn, PFN_DEV),
> +						    prot);
>   		else
> -			ret = vmf_insert_pfn(&cvma, address, pfn);
> +			ret = vmf_insert_pfn_prot(vma, address, pfn, prot);
>   
>   		/* Never error on prefaulted PTEs */
>   		if (unlikely((ret & VM_FAULT_ERROR))) {
> @@ -319,7 +319,7 @@ vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf)
>   	if (ret)
>   		return ret;
>   
> -	prot = vm_get_page_prot(vma->vm_flags);
> +	prot = vma->vm_page_prot;
>   	ret = ttm_bo_vm_fault_reserved(vmf, prot, TTM_BO_VM_NUM_PREFAULT);
>   	if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT))
>   		return ret;



^ permalink raw reply	[flat|nested] 5+ messages in thread

* [PATCH 1/2] mm: Add and export vmf_insert_mixed_prot()
  2019-12-03  7:54 [PATCH 0/2] mm, drm/ttm: Fix pte insertion with customized protection Thomas Hellström (VMware)
@ 2019-12-03  7:54 ` Thomas Hellström (VMware)
  0 siblings, 0 replies; 5+ messages in thread
From: Thomas Hellström (VMware) @ 2019-12-03  7:54 UTC (permalink / raw)
  To: linux-mm, linux-kernel, dri-devel
  Cc: pv-drivers, linux-graphics-maintainer, Thomas Hellstrom,
	Andrew Morton, Michal Hocko, Matthew Wilcox (Oracle),
	Kirill A. Shutemov, Ralph Campbell, Jérôme Glisse,
	Christian König

From: Thomas Hellstrom <thellstrom@vmware.com>

The TTM module today uses a hack to be able to set a different page
protection than struct vm_area_struct::vm_page_prot. To be able to do
this properly, add and export vmf_insert_mixed_prot().

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: "Christian König" <christian.koenig@amd.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Acked-by: Christian König <christian.koenig@amd.com>
---
 include/linux/mm.h |  2 ++
 mm/memory.c        | 15 +++++++++++----
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index cc292273e6ba..29575d3c1e47 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2548,6 +2548,8 @@ vm_fault_t vmf_insert_pfn_prot(struct vm_area_struct *vma, unsigned long addr,
 			unsigned long pfn, pgprot_t pgprot);
 vm_fault_t vmf_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
 			pfn_t pfn);
+vm_fault_t vmf_insert_mixed_prot(struct vm_area_struct *vma, unsigned long addr,
+			pfn_t pfn, pgprot_t pgprot);
 vm_fault_t vmf_insert_mixed_mkwrite(struct vm_area_struct *vma,
 		unsigned long addr, pfn_t pfn);
 int vm_iomap_memory(struct vm_area_struct *vma, phys_addr_t start, unsigned long len);
diff --git a/mm/memory.c b/mm/memory.c
index b1ca51a079f2..28f162e28144 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1719,9 +1719,9 @@ static bool vm_mixed_ok(struct vm_area_struct *vma, pfn_t pfn)
 }
 
 static vm_fault_t __vm_insert_mixed(struct vm_area_struct *vma,
-		unsigned long addr, pfn_t pfn, bool mkwrite)
+	        unsigned long addr, pfn_t pfn, pgprot_t pgprot,
+		bool mkwrite)
 {
-	pgprot_t pgprot = vma->vm_page_prot;
 	int err;
 
 	BUG_ON(!vm_mixed_ok(vma, pfn));
@@ -1764,10 +1764,17 @@ static vm_fault_t __vm_insert_mixed(struct vm_area_struct *vma,
 	return VM_FAULT_NOPAGE;
 }
 
+vm_fault_t vmf_insert_mixed_prot(struct vm_area_struct *vma, unsigned long addr,
+				 pfn_t pfn, pgprot_t pgprot)
+{
+	return __vm_insert_mixed(vma, addr, pfn, pgprot, false);
+}
+EXPORT_SYMBOL(vmf_insert_mixed_prot);
+
 vm_fault_t vmf_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
 		pfn_t pfn)
 {
-	return __vm_insert_mixed(vma, addr, pfn, false);
+	return __vm_insert_mixed(vma, addr, pfn, vma->vm_page_prot, false);
 }
 EXPORT_SYMBOL(vmf_insert_mixed);
 
@@ -1779,7 +1786,7 @@ EXPORT_SYMBOL(vmf_insert_mixed);
 vm_fault_t vmf_insert_mixed_mkwrite(struct vm_area_struct *vma,
 		unsigned long addr, pfn_t pfn)
 {
-	return __vm_insert_mixed(vma, addr, pfn, true);
+	return __vm_insert_mixed(vma, addr, pfn, vma->vm_page_prot, true);
 }
 EXPORT_SYMBOL(vmf_insert_mixed_mkwrite);
 
-- 
2.21.0



^ permalink raw reply	[flat|nested] 5+ messages in thread

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Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-11-26 20:27 [PATCH 1/2] mm: Add and export vmf_insert_mixed_prot() Thomas Hellström (VMware)
2019-11-26 20:27 ` [PATCH 2/2] drm/ttm: Fix vm page protection handling Thomas Hellström (VMware)
2019-11-27  8:43   ` Christian König
2019-11-27  8:42 ` [PATCH 1/2] mm: Add and export vmf_insert_mixed_prot() Christian König
2019-12-03  7:54 [PATCH 0/2] mm, drm/ttm: Fix pte insertion with customized protection Thomas Hellström (VMware)
2019-12-03  7:54 ` [PATCH 1/2] mm: Add and export vmf_insert_mixed_prot() Thomas Hellström (VMware)

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	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-mm linux-mm/ https://lore.kernel.org/linux-mm \
		linux-mm@kvack.org
	public-inbox-index linux-mm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kvack.linux-mm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git