[PATCH v2 3/3] btf: Switch module BTF attribute to sysfs_bin_attr_simple_read()

["Thomas Weißschuh" <linux@weissschuh.net>]

The generic function from the sysfs core can replace the custom one.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
---
 kernel/bpf/btf.c | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index e5a5f023cedd5c288c2774218862c69db469917f..76de36d2552002d1e25c826d701340d9cde07ba1 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -8011,17 +8011,6 @@ struct btf_module {
 static LIST_HEAD(btf_modules);
 static DEFINE_MUTEX(btf_module_mutex);
 
-static ssize_t
-btf_module_read(struct file *file, struct kobject *kobj,
-		struct bin_attribute *bin_attr,
-		char *buf, loff_t off, size_t len)
-{
-	const struct btf *btf = bin_attr->private;
-
-	memcpy(buf, btf->data + off, len);
-	return len;
-}
-
 static void purge_cand_cache(struct btf *btf);
 
 static int btf_module_notify(struct notifier_block *nb, unsigned long op,
@@ -8082,8 +8071,8 @@ static int btf_module_notify(struct notifier_block *nb, unsigned long op,
 			attr->attr.name = btf->name;
 			attr->attr.mode = 0444;
 			attr->size = btf->data_size;
-			attr->private = btf;
-			attr->read = btf_module_read;
+			attr->private = btf->data;
+			attr->read_new = sysfs_bin_attr_simple_read;
 
 			err = sysfs_create_bin_file(btf_kobj, attr);
 			if (err) {

-- 
2.47.1