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| author | Luis R. Rodriguez <mcgrof@suse.com> | 2015-03-05 04:24:13 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-03-05 10:02:12 +0300 |
| commit | bfb33bad83f650f265ed65cbfe8352b7c3ce8c76 (patch) | |
| tree | be103885c03ee38a7c912a95d20f6d56f93a454f /include/linux/init.h | |
| parent | e5008abe929c160d36e44b8c2b644d4330d2e389 (diff) | |
| download | linux-bfb33bad83f650f265ed65cbfe8352b7c3ce8c76.tar.xz | |
init.h: Add early_param_on_off()
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.
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: JBeulich@suse.com
Cc: Jan Beulich <JBeulich@suse.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: julia.lawall@lip6.fr
Link: http://lkml.kernel.org/r/1425518654-3403-4-git-send-email-mcgrof@do-not-panic.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/init.h')
| -rw-r--r-- | include/linux/init.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/init.h b/include/linux/init.h index 2df8e8dd10a4..bc11ff96f336 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); |