riscv: Clarify RISCV_ALTERNATIVE help text

Clarify RISCV_ALTERNATIVE's help text by pointing out that code
patching is not only done at boot time, but also module load time.
Also point out that this is the minimal possible overhead.

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Link: https://lore.kernel.org/r/20230224154601.88163-2-ajones@ventanamicro.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index c5e42cc376048dbc9d960a6275b40c983acb7618..04898c50ef1d9e40e62db4158294157bf723586b 100644 (file)
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -379,8 +379,8 @@ config RISCV_ALTERNATIVE
        help
          This Kconfig allows the kernel to automatically patch the
          errata required by the execution platform at run time. The
-         code patching is performed once in the boot stages. It means
-         that the overhead from this mechanism is just taken once.
+         code patching overhead is minimal, as it's only done once
+         at boot and once on each module load.
 
 config RISCV_ALTERNATIVE_EARLY
        bool