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platform/x86/intel/pmt: Constify 'struct bin_attribute'

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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/20241202-sysfs-const-bin_attr-pdx86-v1-4-9ab204c2a814@weissschuh.net
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Thomas Weißschuh
2024-12-02 20:38:35 +01:00
committed by Ilpo Järvinen
parent b0034f206f
commit 7ff2fecc8b
1 changed files with 2 additions and 2 deletions
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4
drivers/platform/x86/intel/pmt/class.c
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@@ -81,7 +81,7 @@ EXPORT_SYMBOL_NS_GPL(pmt_telem_read_mmio, "INTEL_PMT");
*/
static ssize_t
intel_pmt_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf, loff_t off,
const struct bin_attribute *attr, char *buf, loff_t off,
size_t count)
{
struct intel_pmt_entry *entry = container_of(attr,
@@ -308,7 +308,7 @@ static int intel_pmt_dev_register(struct intel_pmt_entry *entry,
entry->pmt_bin_attr.attr.name = ns->name;
entry->pmt_bin_attr.attr.mode = 0440;
entry->pmt_bin_attr.mmap = intel_pmt_mmap;
entry->pmt_bin_attr.read = intel_pmt_read;
entry->pmt_bin_attr.read_new = intel_pmt_read;
entry->pmt_bin_attr.size = entry->size;
ret = sysfs_create_bin_file(&dev->kobj, &entry->pmt_bin_attr);