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authorRusty Russell <rusty@rustcorp.com.au>2012-01-13 09:32:17 +1030
committerRusty Russell <rusty@rustcorp.com.au>2012-01-13 09:32:17 +1030
commit69116f279a9eaf4c540934269342d9149538fc79 (patch)
treeeb335b97a99fb25ce548dd06f053a81e3c56016f /include
parentbafeafeab94b8d3019aac15c2df2ce47b08a6363 (diff)
downloadlinux-69116f279a9eaf4c540934269342d9149538fc79.tar.bz2
module_param: avoid bool abuse, add bint for special cases.
For historical reasons, we allow module_param(bool) to take an int (or an unsigned int). That's going away. A few drivers really want an int: they set it to -1 and a parameter will set it to 0 or 1. This sucks: reading them from sysfs will give 'Y' for both -1 and 1, but if we change it to an int, then the users might be broken (if they did "param" instead of "param=1"). Use a new 'bint' parser for them. (ntfs has a different problem: it needs an int for debug_msgs because it's also exposed via sysctl.) Cc: Steve Glendinning <steve.glendinning@smsc.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Cc: Hoang-Nam Nguyen <hnguyen@de.ibm.com> Cc: Christoph Raisch <raisch@de.ibm.com> Cc: Roland Dreier <roland@kernel.org> Cc: Sean Hefty <sean.hefty@intel.com> Cc: Hal Rosenstock <hal.rosenstock@gmail.com> Cc: linux390@de.ibm.com Cc: Anton Altaparmakov <anton@tuxera.com> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.de> Cc: lm-sensors@lm-sensors.org Cc: linux-rdma@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linux-ntfs-dev@lists.sourceforge.net Cc: alsa-devel@alsa-project.org Acked-by: Takashi Iwai <tiwai@suse.de> (For the sound part) Acked-by: Guenter Roeck <guenter.roeck@ericsson.com> (For the hwmon driver) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include')
-rw-r--r--include/linux/moduleparam.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index 794d4b0f1215..6bdde0c3bcca 100644
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -367,6 +367,12 @@ extern int param_set_invbool(const char *val, const struct kernel_param *kp);
extern int param_get_invbool(char *buffer, const struct kernel_param *kp);
#define param_check_invbool(name, p) __param_check(name, p, bool)
+/* An int, which can only be set like a bool (though it shows as an int). */
+extern struct kernel_param_ops param_ops_bint;
+extern int param_set_bint(const char *val, const struct kernel_param *kp);
+#define param_get_bint param_get_int
+#define param_check_bint param_check_int
+
/**
* module_param_array - a parameter which is an array of some type
* @name: the name of the array variable