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authorLuis R. Rodriguez <mcgrof@suse.com>2015-03-05 04:24:13 +0300
committerIngo Molnar <mingo@kernel.org>2015-03-05 10:02:12 +0300
commitbfb33bad83f650f265ed65cbfe8352b7c3ce8c76 (patch)
treebe103885c03ee38a7c912a95d20f6d56f93a454f /include/linux/init.h
parente5008abe929c160d36e44b8c2b644d4330d2e389 (diff)
downloadlinux-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.h15
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);