[PATCH bpf-next 1/2] bpf: Add some description about BPF_JIT_ALWAYS_ON in Kconfig

[Tiezhu Yang]

When CONFIG_BPF_JIT_ALWAYS_ON is enabled, bpf_jit_enable is permanently
set to 1 and setting any other value than that will return in failure.

Add the above description in the help text of BPF_JIT_ALWAYS_ON, and then
we can distinguish between BPF_JIT_ALWAYS_ON and BPF_JIT_DEFAULT_ON.

Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>
---
 kernel/bpf/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/bpf/Kconfig b/kernel/bpf/Kconfig
index d24d518..88409f8 100644
--- a/kernel/bpf/Kconfig
+++ b/kernel/bpf/Kconfig
@@ -58,6 +58,9 @@ config BPF_JIT_ALWAYS_ON
 	  Enables BPF JIT and removes BPF interpreter to avoid speculative
 	  execution of BPF instructions by the interpreter.
 
+	  When CONFIG_BPF_JIT_ALWAYS_ON is enabled, bpf_jit_enable is permanently
+	  set to 1 and setting any other value than that will return in failure.
+
 config BPF_JIT_DEFAULT_ON
 	def_bool ARCH_WANT_DEFAULT_BPF_JIT || BPF_JIT_ALWAYS_ON
 	depends on HAVE_EBPF_JIT && BPF_JIT
-- 
2.1.0