powerpc/perf/hv-24x7: Constify 'struct bin_attribute'

The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that to protect them against
accidental or malicious modifications.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20241216-sysfs-const-bin_attr-powerpc-v1-5-bbed8906f476@weissschuh.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c
index d400fa391c2765cf201ee4dc754007e655cc74ca..b0768f3d289300826dcd454a8e397a943572fd45 100644 (file)
--- a/arch/powerpc/perf/hv-24x7.c
+++ b/arch/powerpc/perf/hv-24x7.c
@@ -998,7 +998,7 @@ e_out:
 }
 
 static ssize_t catalog_read(struct file *filp, struct kobject *kobj,
-                           struct bin_attribute *bin_attr, char *buf,
+                           const struct bin_attribute *bin_attr, char *buf,
                            loff_t offset, size_t count)
 {
        long hret;
@@ -1108,14 +1108,14 @@ PAGE_0_ATTR(catalog_version, "%lld\n",
                (unsigned long long)be64_to_cpu(page_0->version));
 PAGE_0_ATTR(catalog_len, "%lld\n",
                (unsigned long long)be32_to_cpu(page_0->length) * 4096);
-static BIN_ATTR_RO(catalog, 0/* real length varies */);
+static const BIN_ATTR_RO(catalog, 0/* real length varies */);
 static DEVICE_ATTR_RO(domains);
 static DEVICE_ATTR_RO(sockets);
 static DEVICE_ATTR_RO(chipspersocket);
 static DEVICE_ATTR_RO(coresperchip);
 static DEVICE_ATTR_RO(cpumask);
 
-static struct bin_attribute *if_bin_attrs[] = {
+static const struct bin_attribute *const if_bin_attrs[] = {
        &bin_attr_catalog,
        NULL,
 };
@@ -1141,7 +1141,7 @@ static struct attribute *if_attrs[] = {
 
 static const struct attribute_group if_group = {
        .name = "interface",
-       .bin_attrs = if_bin_attrs,
+       .bin_attrs_new = if_bin_attrs,
        .attrs = if_attrs,
 };