All of lore.kernel.org
 help / color / mirror / Atom feed
From: Dan Williams <dan.j.williams@intel.com>
To: linux-nvdimm@lists.01.org
Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, jack@suse.cz,
	hch@lst.de
Subject: [PATCH v3 02/12] device-dax: Cleanup vm_fault de-reference chains
Date: Mon, 04 Jun 2018 16:11:50 -0700	[thread overview]
Message-ID: <152815391047.39010.14943806463373398992.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <152815389835.39010.13253559944508110923.stgit@dwillia2-desk3.amr.corp.intel.com>

Define a local 'vma' variable rather than repetitively de-referencing
the passed in 'struct vm_fault *' instance.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/dax/device.c |   30 ++++++++++++++++--------------
 1 file changed, 16 insertions(+), 14 deletions(-)

diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index d44d98c54d0f..686de08e120b 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -247,13 +247,14 @@ __weak phys_addr_t dax_pgoff_to_phys(struct dev_dax *dev_dax, pgoff_t pgoff,
 static vm_fault_t __dev_dax_pte_fault(struct dev_dax *dev_dax,
 				struct vm_fault *vmf)
 {
+	struct vm_area_struct *vma = vmf->vma;
 	struct device *dev = &dev_dax->dev;
 	struct dax_region *dax_region;
 	phys_addr_t phys;
 	pfn_t pfn;
 	unsigned int fault_size = PAGE_SIZE;
 
-	if (check_vma(dev_dax, vmf->vma, __func__))
+	if (check_vma(dev_dax, vma, __func__))
 		return VM_FAULT_SIGBUS;
 
 	dax_region = dev_dax->region;
@@ -274,13 +275,14 @@ static vm_fault_t __dev_dax_pte_fault(struct dev_dax *dev_dax,
 
 	pfn = phys_to_pfn_t(phys, dax_region->pfn_flags);
 
-	return vmf_insert_mixed(vmf->vma, vmf->address, pfn);
+	return vmf_insert_mixed(vma, vmf->address, pfn);
 }
 
 static vm_fault_t __dev_dax_pmd_fault(struct dev_dax *dev_dax,
 				struct vm_fault *vmf)
 {
 	unsigned long pmd_addr = vmf->address & PMD_MASK;
+	struct vm_area_struct *vma = vmf->vma;
 	struct device *dev = &dev_dax->dev;
 	struct dax_region *dax_region;
 	phys_addr_t phys;
@@ -288,7 +290,7 @@ static vm_fault_t __dev_dax_pmd_fault(struct dev_dax *dev_dax,
 	pfn_t pfn;
 	unsigned int fault_size = PMD_SIZE;
 
-	if (check_vma(dev_dax, vmf->vma, __func__))
+	if (check_vma(dev_dax, vma, __func__))
 		return VM_FAULT_SIGBUS;
 
 	dax_region = dev_dax->region;
@@ -310,11 +312,10 @@ static vm_fault_t __dev_dax_pmd_fault(struct dev_dax *dev_dax,
 		return VM_FAULT_FALLBACK;
 
 	/* if we are outside of the VMA */
-	if (pmd_addr < vmf->vma->vm_start ||
-			(pmd_addr + PMD_SIZE) > vmf->vma->vm_end)
+	if (pmd_addr < vma->vm_start || (pmd_addr + PMD_SIZE) > vma->vm_end)
 		return VM_FAULT_SIGBUS;
 
-	pgoff = linear_page_index(vmf->vma, pmd_addr);
+	pgoff = linear_page_index(vma, pmd_addr);
 	phys = dax_pgoff_to_phys(dev_dax, pgoff, PMD_SIZE);
 	if (phys == -1) {
 		dev_dbg(dev, "pgoff_to_phys(%#lx) failed\n", pgoff);
@@ -323,7 +324,7 @@ static vm_fault_t __dev_dax_pmd_fault(struct dev_dax *dev_dax,
 
 	pfn = phys_to_pfn_t(phys, dax_region->pfn_flags);
 
-	return vmf_insert_pfn_pmd(vmf->vma, vmf->address, vmf->pmd, pfn,
+	return vmf_insert_pfn_pmd(vma, vmf->address, vmf->pmd, pfn,
 			vmf->flags & FAULT_FLAG_WRITE);
 }
 
@@ -332,6 +333,7 @@ static vm_fault_t __dev_dax_pud_fault(struct dev_dax *dev_dax,
 				struct vm_fault *vmf)
 {
 	unsigned long pud_addr = vmf->address & PUD_MASK;
+	struct vm_area_struct *vma = vmf->vma;
 	struct device *dev = &dev_dax->dev;
 	struct dax_region *dax_region;
 	phys_addr_t phys;
@@ -340,7 +342,7 @@ static vm_fault_t __dev_dax_pud_fault(struct dev_dax *dev_dax,
 	unsigned int fault_size = PUD_SIZE;
 
 
-	if (check_vma(dev_dax, vmf->vma, __func__))
+	if (check_vma(dev_dax, vma, __func__))
 		return VM_FAULT_SIGBUS;
 
 	dax_region = dev_dax->region;
@@ -362,11 +364,10 @@ static vm_fault_t __dev_dax_pud_fault(struct dev_dax *dev_dax,
 		return VM_FAULT_FALLBACK;
 
 	/* if we are outside of the VMA */
-	if (pud_addr < vmf->vma->vm_start ||
-			(pud_addr + PUD_SIZE) > vmf->vma->vm_end)
+	if (pud_addr < vma->vm_start || (pud_addr + PUD_SIZE) > vma->vm_end)
 		return VM_FAULT_SIGBUS;
 
-	pgoff = linear_page_index(vmf->vma, pud_addr);
+	pgoff = linear_page_index(vma, pud_addr);
 	phys = dax_pgoff_to_phys(dev_dax, pgoff, PUD_SIZE);
 	if (phys == -1) {
 		dev_dbg(dev, "pgoff_to_phys(%#lx) failed\n", pgoff);
@@ -375,7 +376,7 @@ static vm_fault_t __dev_dax_pud_fault(struct dev_dax *dev_dax,
 
 	pfn = phys_to_pfn_t(phys, dax_region->pfn_flags);
 
-	return vmf_insert_pfn_pud(vmf->vma, vmf->address, vmf->pud, pfn,
+	return vmf_insert_pfn_pud(vma, vmf->address, vmf->pud, pfn,
 			vmf->flags & FAULT_FLAG_WRITE);
 }
 #else
@@ -390,12 +391,13 @@ static vm_fault_t dev_dax_huge_fault(struct vm_fault *vmf,
 		enum page_entry_size pe_size)
 {
 	int rc, id;
-	struct file *filp = vmf->vma->vm_file;
+	struct vm_area_struct *vma = vmf->vma;
+	struct file *filp = vma->vm_file;
 	struct dev_dax *dev_dax = filp->private_data;
 
 	dev_dbg(&dev_dax->dev, "%s: %s (%#lx - %#lx) size = %d\n", current->comm,
 			(vmf->flags & FAULT_FLAG_WRITE) ? "write" : "read",
-			vmf->vma->vm_start, vmf->vma->vm_end, pe_size);
+			vma->vm_start, vma->vm_end, pe_size);
 
 	id = dax_read_lock();
 	switch (pe_size) {

_______________________________________________
Linux-nvdimm mailing list
Linux-nvdimm@lists.01.org
https://lists.01.org/mailman/listinfo/linux-nvdimm

WARNING: multiple messages have this Message-ID (diff)
From: Dan Williams <dan.j.williams@intel.com>
To: linux-nvdimm@lists.01.org
Cc: hch@lst.de, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
	jack@suse.cz
Subject: [PATCH v3 02/12] device-dax: Cleanup vm_fault de-reference chains
Date: Mon, 04 Jun 2018 16:11:50 -0700	[thread overview]
Message-ID: <152815391047.39010.14943806463373398992.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <152815389835.39010.13253559944508110923.stgit@dwillia2-desk3.amr.corp.intel.com>

Define a local 'vma' variable rather than repetitively de-referencing
the passed in 'struct vm_fault *' instance.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/dax/device.c |   30 ++++++++++++++++--------------
 1 file changed, 16 insertions(+), 14 deletions(-)

diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index d44d98c54d0f..686de08e120b 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -247,13 +247,14 @@ __weak phys_addr_t dax_pgoff_to_phys(struct dev_dax *dev_dax, pgoff_t pgoff,
 static vm_fault_t __dev_dax_pte_fault(struct dev_dax *dev_dax,
 				struct vm_fault *vmf)
 {
+	struct vm_area_struct *vma = vmf->vma;
 	struct device *dev = &dev_dax->dev;
 	struct dax_region *dax_region;
 	phys_addr_t phys;
 	pfn_t pfn;
 	unsigned int fault_size = PAGE_SIZE;
 
-	if (check_vma(dev_dax, vmf->vma, __func__))
+	if (check_vma(dev_dax, vma, __func__))
 		return VM_FAULT_SIGBUS;
 
 	dax_region = dev_dax->region;
@@ -274,13 +275,14 @@ static vm_fault_t __dev_dax_pte_fault(struct dev_dax *dev_dax,
 
 	pfn = phys_to_pfn_t(phys, dax_region->pfn_flags);
 
-	return vmf_insert_mixed(vmf->vma, vmf->address, pfn);
+	return vmf_insert_mixed(vma, vmf->address, pfn);
 }
 
 static vm_fault_t __dev_dax_pmd_fault(struct dev_dax *dev_dax,
 				struct vm_fault *vmf)
 {
 	unsigned long pmd_addr = vmf->address & PMD_MASK;
+	struct vm_area_struct *vma = vmf->vma;
 	struct device *dev = &dev_dax->dev;
 	struct dax_region *dax_region;
 	phys_addr_t phys;
@@ -288,7 +290,7 @@ static vm_fault_t __dev_dax_pmd_fault(struct dev_dax *dev_dax,
 	pfn_t pfn;
 	unsigned int fault_size = PMD_SIZE;
 
-	if (check_vma(dev_dax, vmf->vma, __func__))
+	if (check_vma(dev_dax, vma, __func__))
 		return VM_FAULT_SIGBUS;
 
 	dax_region = dev_dax->region;
@@ -310,11 +312,10 @@ static vm_fault_t __dev_dax_pmd_fault(struct dev_dax *dev_dax,
 		return VM_FAULT_FALLBACK;
 
 	/* if we are outside of the VMA */
-	if (pmd_addr < vmf->vma->vm_start ||
-			(pmd_addr + PMD_SIZE) > vmf->vma->vm_end)
+	if (pmd_addr < vma->vm_start || (pmd_addr + PMD_SIZE) > vma->vm_end)
 		return VM_FAULT_SIGBUS;
 
-	pgoff = linear_page_index(vmf->vma, pmd_addr);
+	pgoff = linear_page_index(vma, pmd_addr);
 	phys = dax_pgoff_to_phys(dev_dax, pgoff, PMD_SIZE);
 	if (phys == -1) {
 		dev_dbg(dev, "pgoff_to_phys(%#lx) failed\n", pgoff);
@@ -323,7 +324,7 @@ static vm_fault_t __dev_dax_pmd_fault(struct dev_dax *dev_dax,
 
 	pfn = phys_to_pfn_t(phys, dax_region->pfn_flags);
 
-	return vmf_insert_pfn_pmd(vmf->vma, vmf->address, vmf->pmd, pfn,
+	return vmf_insert_pfn_pmd(vma, vmf->address, vmf->pmd, pfn,
 			vmf->flags & FAULT_FLAG_WRITE);
 }
 
@@ -332,6 +333,7 @@ static vm_fault_t __dev_dax_pud_fault(struct dev_dax *dev_dax,
 				struct vm_fault *vmf)
 {
 	unsigned long pud_addr = vmf->address & PUD_MASK;
+	struct vm_area_struct *vma = vmf->vma;
 	struct device *dev = &dev_dax->dev;
 	struct dax_region *dax_region;
 	phys_addr_t phys;
@@ -340,7 +342,7 @@ static vm_fault_t __dev_dax_pud_fault(struct dev_dax *dev_dax,
 	unsigned int fault_size = PUD_SIZE;
 
 
-	if (check_vma(dev_dax, vmf->vma, __func__))
+	if (check_vma(dev_dax, vma, __func__))
 		return VM_FAULT_SIGBUS;
 
 	dax_region = dev_dax->region;
@@ -362,11 +364,10 @@ static vm_fault_t __dev_dax_pud_fault(struct dev_dax *dev_dax,
 		return VM_FAULT_FALLBACK;
 
 	/* if we are outside of the VMA */
-	if (pud_addr < vmf->vma->vm_start ||
-			(pud_addr + PUD_SIZE) > vmf->vma->vm_end)
+	if (pud_addr < vma->vm_start || (pud_addr + PUD_SIZE) > vma->vm_end)
 		return VM_FAULT_SIGBUS;
 
-	pgoff = linear_page_index(vmf->vma, pud_addr);
+	pgoff = linear_page_index(vma, pud_addr);
 	phys = dax_pgoff_to_phys(dev_dax, pgoff, PUD_SIZE);
 	if (phys == -1) {
 		dev_dbg(dev, "pgoff_to_phys(%#lx) failed\n", pgoff);
@@ -375,7 +376,7 @@ static vm_fault_t __dev_dax_pud_fault(struct dev_dax *dev_dax,
 
 	pfn = phys_to_pfn_t(phys, dax_region->pfn_flags);
 
-	return vmf_insert_pfn_pud(vmf->vma, vmf->address, vmf->pud, pfn,
+	return vmf_insert_pfn_pud(vma, vmf->address, vmf->pud, pfn,
 			vmf->flags & FAULT_FLAG_WRITE);
 }
 #else
@@ -390,12 +391,13 @@ static vm_fault_t dev_dax_huge_fault(struct vm_fault *vmf,
 		enum page_entry_size pe_size)
 {
 	int rc, id;
-	struct file *filp = vmf->vma->vm_file;
+	struct vm_area_struct *vma = vmf->vma;
+	struct file *filp = vma->vm_file;
 	struct dev_dax *dev_dax = filp->private_data;
 
 	dev_dbg(&dev_dax->dev, "%s: %s (%#lx - %#lx) size = %d\n", current->comm,
 			(vmf->flags & FAULT_FLAG_WRITE) ? "write" : "read",
-			vmf->vma->vm_start, vmf->vma->vm_end, pe_size);
+			vma->vm_start, vma->vm_end, pe_size);
 
 	id = dax_read_lock();
 	switch (pe_size) {

  parent reply	other threads:[~2018-06-04 23:21 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-04 23:11 [PATCH v3 00/12] mm: Teach memory_failure() about ZONE_DEVICE pages Dan Williams
2018-06-04 23:11 ` Dan Williams
2018-06-04 23:11 ` Dan Williams
2018-06-04 23:11 ` [PATCH v3 01/12] device-dax: Convert to vmf_insert_mixed and vm_fault_t Dan Williams
2018-06-04 23:11   ` Dan Williams
2018-06-04 23:11 ` Dan Williams [this message]
2018-06-04 23:11   ` [PATCH v3 02/12] device-dax: Cleanup vm_fault de-reference chains Dan Williams
2018-06-04 23:11 ` [PATCH v3 03/12] device-dax: Enable page_mapping() Dan Williams
2018-06-04 23:11   ` Dan Williams
2018-06-07 15:39   ` Jan Kara
2018-06-07 15:39     ` Jan Kara
2018-06-04 23:12 ` [PATCH v3 04/12] device-dax: Set page->index Dan Williams
2018-06-04 23:12   ` Dan Williams
2018-06-07 15:50   ` Jan Kara
2018-06-07 15:50     ` Jan Kara
2018-06-04 23:12 ` [PATCH v3 05/12] filesystem-dax: " Dan Williams
2018-06-04 23:12   ` Dan Williams
2018-06-04 23:12   ` Dan Williams
2018-06-07 16:02   ` Jan Kara
2018-06-07 16:02     ` Jan Kara
2018-06-04 23:12 ` [PATCH v3 06/12] mm, madvise_inject_error: Let memory_failure() optionally take a page reference Dan Williams
2018-06-04 23:12   ` Dan Williams
2018-06-04 23:12 ` [PATCH v3 07/12] x86/mm/pat: Prepare {reserve, free}_memtype() for "decoy" addresses Dan Williams
2018-06-04 23:12   ` Dan Williams
2018-06-04 23:12   ` [v3,07/12] " Dan Williams
2018-06-04 23:12 ` [PATCH v3 08/12] x86/memory_failure: Introduce {set, clear}_mce_nospec() Dan Williams
2018-06-04 23:12   ` Dan Williams
2018-06-04 23:12   ` [v3,08/12] " Dan Williams
2018-06-07  4:42   ` [PATCH v3 08/12] " Dan Williams
2018-06-07  4:42     ` Dan Williams
2018-06-07  4:42     ` [v3,08/12] " Dan Williams
2018-06-07 17:02     ` [PATCH v3 08/12] " Luck, Tony
2018-06-07 17:02       ` Luck, Tony
2018-06-07 17:02       ` [v3,08/12] " Luck, Tony
2018-06-04 23:12 ` [PATCH v3 09/12] mm, memory_failure: Pass page size to kill_proc() Dan Williams
2018-06-04 23:12   ` Dan Williams
2018-06-04 23:12 ` [PATCH v3 10/12] mm, memory_failure: Fix page->mapping assumptions relative to the page lock Dan Williams
2018-06-04 23:12   ` Dan Williams
2018-06-04 23:12 ` [PATCH v3 11/12] mm, memory_failure: Teach memory_failure() about dev_pagemap pages Dan Williams
2018-06-04 23:12   ` Dan Williams
2018-06-04 23:12   ` Dan Williams
2018-06-07  4:22   ` Dan Williams
2018-06-07  4:22     ` Dan Williams
2018-06-07 16:30   ` Jan Kara
2018-06-07 16:30     ` Jan Kara
2018-06-07 16:45     ` Dan Williams
2018-06-04 23:12 ` [PATCH v3 12/12] libnvdimm, pmem: Restore page attributes when clearing errors Dan Williams
2018-06-04 23:12   ` Dan Williams

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=152815391047.39010.14943806463373398992.stgit@dwillia2-desk3.amr.corp.intel.com \
    --to=dan.j.williams@intel.com \
    --cc=hch@lst.de \
    --cc=jack@suse.cz \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-nvdimm@lists.01.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.