netatop: fix compilation warning for kernel module

Fix compilation warning for missing fallthrough.
Fix compilation warning:
/builder/shared-workdir/build/build_dir/target-mipsel_24kc_musl/netatop-3.1/module/netatop.c: In function 'getsockopt':
/builder/shared-workdir/build/build_dir/target-mipsel_24kc_musl/netatop-3.1/module/netatop.c:1619:26: error: this statement may fall through [-Werror=implicit-fallthrough=]
 1619 |                 tasktype = 'g';
      |                 ~~~~~~~~~^~~~~
/builder/shared-workdir/build/build_dir/target-mipsel_24kc_musl/netatop-3.1/module/netatop.c:1621:12: note: here
 1621 |            case NETATOP_GETCNT_PID:
      |            ^~~~
cc1: all warnings being treated as errors

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

diff --git a/admin/netatop/patches/100-fix-compilation-warning-fallthrough.patch b/admin/netatop/patches/100-fix-compilation-warning-fallthrough.patch
new file mode 100644 (file)
index 0000000..65de31e
--- /dev/null
+++ b/admin/netatop/patches/100-fix-compilation-warning-fallthrough.patch
@@ -0,0 +1,11 @@
+--- a/module/netatop.c
++++ b/module/netatop.c
+@@ -1617,7 +1617,7 @@ getsockopt(struct sock *sk, int cmd, void __user *user, int *len)
+ 
+          case NETATOP_GETCNT_TGID:
+               tasktype = 'g';         
+-              // fall through
++              fallthrough;
+          case NETATOP_GETCNT_PID:
+               if (*len < sizeof(pid_t))
+                       return -EINVAL;