Driver core: add CONFIG_UEVENT_HELPER_PATH

The kernel creates a process for every event that is send, even when there is no binary it could execute. We are needlessly creating around 200-300 failing processes during early bootup, until we have the chance to disable it from userspace. This change allows us to disable /sbin/hotplug entirely, if you want to, by setting UEVENT_HELPER_PATH="" in the kernel config. Signed-off-by: Kay Sievers <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
kyagi · Oct 12, 2007 · 6a8d8ab · 6a8d8ab
1 parent 7eff2e7
commit 6a8d8ab
Show file tree

Hide file tree

Showing 2 changed files with 9 additions and 1 deletion.
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
@@ -1,5 +1,13 @@
 menu "Generic Driver Options"
 
+config UEVENT_HELPER_PATH
+	string "path to uevent helper"
+	depends on HOTPLUG
+	default "/sbin/hotplug"
+	help
+	  Path to uevent helper program forked by the kernel for
+	  every uevent.
+
 config STANDALONE
 	bool "Select only drivers that don't need compile-time external firmware" if EXPERIMENTAL
 	default y

diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
@@ -35,7 +35,7 @@ const char *kobject_actions[] = {
 
 #if defined(CONFIG_HOTPLUG)
 u64 uevent_seqnum;
-char uevent_helper[UEVENT_HELPER_PATH_LEN] = "/sbin/hotplug";
+char uevent_helper[UEVENT_HELPER_PATH_LEN] = CONFIG_UEVENT_HELPER_PATH;
 static DEFINE_SPINLOCK(sequence_lock);
 #if defined(CONFIG_NET)
 static struct sock *uevent_sock;