sysfs: treewide: constify attribute callback of bin_attribute::mmap()

The mmap() callbacks should not modify the struct
bin_attribute passed as argument.
Enforce this by marking the argument as const.

As there are not many callback implementers perform this change
throughout the tree at once.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Andrew Donnellan <ajd@linux.ibm.com> # ocxl
Acked-by: Krzysztof Wilczyński <kw@linux.com>
Link: https://lore.kernel.org/r/20241103-sysfs-const-bin_attr-v2-6-71110628844c@weissschuh.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c
index 5808a66e2a81f7eba9a245fd6a343406a1ade87d..3048758304b57afa01ddeb6558c39bdb48c9a3f6 100644 (file)
--- a/arch/alpha/kernel/pci-sysfs.c
+++ b/arch/alpha/kernel/pci-sysfs.c
@@ -64,7 +64,7 @@ static int __pci_mmap_fits(struct pci_dev *pdev, int num,
  * Return: %0 on success, negative error code otherwise
  */
 static int pci_mmap_resource(struct kobject *kobj,
-                            struct bin_attribute *attr,
+                            const struct bin_attribute *attr,
                             struct vm_area_struct *vma, int sparse)
 {
        struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
@@ -93,14 +93,14 @@ static int pci_mmap_resource(struct kobject *kobj,
 }
 
 static int pci_mmap_resource_sparse(struct file *filp, struct kobject *kobj,
-                                   struct bin_attribute *attr,
+                                   const struct bin_attribute *attr,
                                    struct vm_area_struct *vma)
 {
        return pci_mmap_resource(kobj, attr, vma, 1);
 }
 
 static int pci_mmap_resource_dense(struct file *filp, struct kobject *kobj,
-                                  struct bin_attribute *attr,
+                                  const struct bin_attribute *attr,
                                   struct vm_area_struct *vma)
 {
        return pci_mmap_resource(kobj, attr, vma, 0);

diff --git a/drivers/misc/ocxl/sysfs.c b/drivers/misc/ocxl/sysfs.c
index 405180d47d9bff0aaa7a736bb3fecfbe318db961..07520d6e6dc55702696b8656440914c379e6e27a 100644 (file)
--- a/drivers/misc/ocxl/sysfs.c
+++ b/drivers/misc/ocxl/sysfs.c
@@ -125,7 +125,7 @@ static const struct vm_operations_struct global_mmio_vmops = {
 };
 
 static int global_mmio_mmap(struct file *filp, struct kobject *kobj,
-                       struct bin_attribute *bin_attr,
+                       const struct bin_attribute *bin_attr,
                        struct vm_area_struct *vma)
 {
        struct ocxl_afu *afu = to_afu(kobj_to_dev(kobj));

diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c
index 4f47a13cb500ff5339cde426b6ccb020fcd74ae7..7abd4f546d3c071f31e622d881f5c5ac3e4de55e 100644 (file)
--- a/drivers/pci/p2pdma.c
+++ b/drivers/pci/p2pdma.c
@@ -90,7 +90,7 @@ static ssize_t published_show(struct device *dev, struct device_attribute *attr,
 static DEVICE_ATTR_RO(published);
 
 static int p2pmem_alloc_mmap(struct file *filp, struct kobject *kobj,
-               struct bin_attribute *attr, struct vm_area_struct *vma)
+               const struct bin_attribute *attr, struct vm_area_struct *vma)
 {
        struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
        size_t len = vma->vm_end - vma->vm_start;

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 13912940ed2bb66c0086e5bea9a3cb6417ac14dd..0ad3427228b12aa95325c6fc00e9686740559238 100644 (file)
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -910,7 +910,7 @@ static ssize_t pci_write_legacy_io(struct file *filp, struct kobject *kobj,
  * memory space.
  */
 static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj,
-                              struct bin_attribute *attr,
+                              const struct bin_attribute *attr,
                               struct vm_area_struct *vma)
 {
        struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj));
@@ -930,7 +930,7 @@ static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj,
  * memory space. Returns -ENOSYS if the operation isn't supported
  */
 static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj,
-                             struct bin_attribute *attr,
+                             const struct bin_attribute *attr,
                              struct vm_area_struct *vma)
 {
        struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj));
@@ -1034,7 +1034,7 @@ void pci_remove_legacy_files(struct pci_bus *b)
  *
  * Use the regular PCI mapping routines to map a PCI resource into userspace.
  */
-static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
+static int pci_mmap_resource(struct kobject *kobj, const struct bin_attribute *attr,
                             struct vm_area_struct *vma, int write_combine)
 {
        struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
@@ -1059,14 +1059,14 @@ static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
 }
 
 static int pci_mmap_resource_uc(struct file *filp, struct kobject *kobj,
-                               struct bin_attribute *attr,
+                               const struct bin_attribute *attr,
                                struct vm_area_struct *vma)
 {
        return pci_mmap_resource(kobj, attr, vma, 0);
 }
 
 static int pci_mmap_resource_wc(struct file *filp, struct kobject *kobj,
-                               struct bin_attribute *attr,
+                               const struct bin_attribute *attr,
                                struct vm_area_struct *vma)
 {
        return pci_mmap_resource(kobj, attr, vma, 1);

diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c
index c04bb7f97a4db13268fc5697887951cf8f0f5a25..f9afa23e754b8b68bd59b72d6a72d26503a21f31 100644 (file)
--- a/drivers/platform/x86/intel/pmt/class.c
+++ b/drivers/platform/x86/intel/pmt/class.c
@@ -103,7 +103,7 @@ intel_pmt_read(struct file *filp, struct kobject *kobj,
 
 static int
 intel_pmt_mmap(struct file *filp, struct kobject *kobj,
-               struct bin_attribute *attr, struct vm_area_struct *vma)
+               const struct bin_attribute *attr, struct vm_area_struct *vma)
 {
        struct intel_pmt_entry *entry = container_of(attr,
                                                     struct intel_pmt_entry,

diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c
index 8704095994118c2660f345c504b5ea466d053efb..3976360d0096d6681faf88815cc6277fb76a1d9f 100644 (file)
--- a/drivers/uio/uio_hv_generic.c
+++ b/drivers/uio/uio_hv_generic.c
@@ -135,7 +135,7 @@ static void hv_uio_rescind(struct vmbus_channel *channel)
  * The ring buffer is allocated as contiguous memory by vmbus_open
  */
 static int hv_uio_ring_mmap(struct file *filp, struct kobject *kobj,
-                           struct bin_attribute *attr,
+                           const struct bin_attribute *attr,
                            struct vm_area_struct *vma)
 {
        struct vmbus_channel *channel

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index d1b22d56198b55ee39fe4c4fc994f5b753641992..9fcdc8cd3118f359742bfd8b708d5c3eff511042 100644 (file)
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -309,7 +309,7 @@ struct bin_attribute {
                         char *, loff_t, size_t);
        loff_t (*llseek)(struct file *, struct kobject *, struct bin_attribute *,
                         loff_t, int);
-       int (*mmap)(struct file *, struct kobject *, struct bin_attribute *attr,
+       int (*mmap)(struct file *, struct kobject *, const struct bin_attribute *attr,
                    struct vm_area_struct *vma);
 };