From 9b4bbbd2aebb2630c587faae911463198172a7e0 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Date: Tue, 9 May 2017 17:17:21 +0300 Subject: [PATCH] platform/x86: thinkpad_acpi: Add a comment about 0 in module_param_call() As per discussion [1] there are only few users of module_param_call() in kernel which prevent to read module parameters back. It thinkpad_acpi driver there is even no method do so. Thus, for now, add just a comment to explain why 0 is used as permissions in module_param_call(). [1]: https://patchwork.ozlabs.org/patch/713245/ Cc: Richard Weinberger <richard.weinberger@gmail.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> --- drivers/platform/x86/thinkpad_acpi.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index d2f67a8071a6d..cab115bece153 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -9664,6 +9664,7 @@ module_param_named(enable, alsa_enable, bool, 0444); MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ +/* The module parameter can't be read back, that's why 0 is used here */ #define TPACPI_PARAM(feature) \ module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation") -- 2.30.2