selftests/bpf: Fix bpf selftest build error

On linux-next, build for bpf selftest displays an error due to
mismatch in the expected function signature of bpf_testmod_test_read
and bpf_testmod_test_write.

Commit 97d06802d10a ("sysfs: constify bin_attribute argument of bin_attribute::read/write()")
changed the required type for struct bin_attribute to const struct bin_attribute.

To resolve the error, update corresponding signature for the callback.

Fixes: 97d06802d10a ("sysfs: constify bin_attribute argument of bin_attribute::read/write()")
Reported-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Closes: https://lore.kernel.org/all/e915da49-2b9a-4c4c-a34f-877f378129f6@linux.ibm.com/
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Signed-off-by: Saket Kumar Bhaskar <skb99@linux.ibm.com>
Link: https://lore.kernel.org/r/20250512091108.2015615-1-skb99@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c b/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c
index e6c248e3ae54e1844e4e3f3d8db2a2badc4e71fe..e9e918cdf31ff2b15bf41302ad429e8683b834d6 100644 (file)
--- a/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c
+++ b/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c
@@ -385,7 +385,7 @@ int bpf_testmod_fentry_ok;
 
 noinline ssize_t
 bpf_testmod_test_read(struct file *file, struct kobject *kobj,
-                     struct bin_attribute *bin_attr,
+                     const struct bin_attribute *bin_attr,
                      char *buf, loff_t off, size_t len)
 {
        struct bpf_testmod_test_read_ctx ctx = {
@@ -465,7 +465,7 @@ ALLOW_ERROR_INJECTION(bpf_testmod_test_read, ERRNO);
 
 noinline ssize_t
 bpf_testmod_test_write(struct file *file, struct kobject *kobj,
-                     struct bin_attribute *bin_attr,
+                     const struct bin_attribute *bin_attr,
                      char *buf, loff_t off, size_t len)
 {
        struct bpf_testmod_test_write_ctx ctx = {
@@ -567,7 +567,7 @@ static void testmod_unregister_uprobe(void)
 
 static ssize_t
 bpf_testmod_uprobe_write(struct file *file, struct kobject *kobj,
-                        struct bin_attribute *bin_attr,
+                        const struct bin_attribute *bin_attr,
                         char *buf, loff_t off, size_t len)
 {
        unsigned long offset = 0;