From: "Luis R. Rodriguez" <[email protected]> At times all you need is a kconfig variable to enable a feature, by default but you may want to also enable / disable it through a kernel parameter. In such cases the parameter routines to turn the thing on / off are really simple. Just use a wrapper for this, it lets us generalize the code and makes it easier to associate parameters with related kernel configuration options.
Cc: Greg Kroah-Hartman <[email protected]> Cc: Tony Lindgren <[email protected]> Cc: [email protected] Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: [email protected] Cc: Juergen Gross <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Toshi Kani <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Jan Beulich <[email protected]> Cc: Pavel Machek <[email protected]> Cc: Xishi Qiu <[email protected]> Cc: Andrew Morton <[email protected]> Cc: David Vrabel <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Vlastimil Babka <[email protected]> Cc: Joonsoo Kim <[email protected]> Cc: Dexuan Cui <[email protected]> Signed-off-by: Luis R. Rodriguez <[email protected]> --- include/linux/init.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/include/linux/init.h b/include/linux/init.h index 2df8e8d..bc11ff9 100644 --- a/include/linux/init.h +++ b/include/linux/init.h @@ -268,6 +268,21 @@ struct obs_kernel_param { #define early_param(str, fn) \ __setup_param(str, fn, fn, 1) +#define early_param_on_off(str_on, str_off, var, config) \ + int var = IS_ENABLED(config); \ + static int __init parse_##var##_on(char *arg) \ + { \ + var = 1; \ + return 0; \ + } \ + static int __init parse_##var##_off(char *arg) \ + { \ + var = 0; \ + return 0; \ + } \ + __setup_param(str_on, parse_##var##_on, parse_##var##_on, 1); \ + __setup_param(str_off, parse_##var##_off, parse_##var##_off, 1) + /* Relies on boot_command_line being set */ void __init parse_early_param(void); void __init parse_early_options(char *cmdline); -- 2.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
