selftest/livepatch: Only run test-kprobe with CONFIG_KPROBES_ON_FTRACE

CONFIG_KPROBES_ON_FTRACE is required for test-kprobe. Skip test-kprobe
when CONFIG_KPROBES_ON_FTRACE is not set. Since some kernel may not have
/proc/config.gz, grep for kprobe_ftrace_ops from /proc/kallsyms to check
whether CONFIG_KPROBES_ON_FTRACE is enabled.

Signed-off-by: Song Liu <[email protected]>
Acked-by: Joe Lawrence <[email protected]>
Acked-by: Miroslav Benes <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[[email protected]: Call grep with -q option.]
Reviewed-by: Petr Mladek <[email protected]>
Tested-by: Petr Mladek <[email protected]>
Signed-off-by: Petr Mladek <[email protected]>

Author: liu-song-6

tools/testing/selftests/livepatch/test-kprobe.sh

@@ -5,6 +5,8 @@
 
 . $(dirname $0)/functions.sh
 
+grep -q kprobe_ftrace_ops /proc/kallsyms || skip "test-kprobe requires CONFIG_KPROBES_ON_FTRACE"
+
 MOD_LIVEPATCH=test_klp_livepatch
 MOD_KPROBE=test_klp_kprobe