module: add kernel param to force disable module load

Sometimes we need to test a kernel of same version with code or config option changes. We already have sysctl to disable module load, but add a kernel parameter will be more convenient. Since modules_disabled is int, so here use bint type in core_param. TODO: make sysctl accept bool and change modules_disabled to bool Signed-off-by: Dave Young <dyoung@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

module: add kernel param to force disable module load
Sometimes we need to test a kernel of same version with code or config option changes. We already have sysctl to disable module load, but add a kernel parameter will be more convenient. Since modules_disabled is int, so here use bint type in core_param. TODO: make sysctl accept bool and change modules_disabled to bool Signed-off-by: Dave Young <dyoung@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Dave Young · Rusty Russell
1 parent e22057c859
Showing 2 changed files with 3 additions and 0 deletions Side-by-side Diff
Documentation/kernel-parameters.txt
kernel/module.c
@@ -1869,6 +1869,8 @@
 			shutdown the other cpus.  Instead use the REBOOT_VECTOR
 			irq.
  
+	nomodule	Disable module load
+
 	nopat		[X86] Disable PAT (page attribute table extension of
 			pagetables) support.
  
@@ -105,6 +105,7 @@
  
 /* Block module loading/unloading? */
 int modules_disabled = 0;
+core_param(nomodule, modules_disabled, bint, 0);
  
 /* Waiting for a module to finish initializing? */
 static DECLARE_WAIT_QUEUE_HEAD(module_wq);
...	...	@@ -1869,6 +1869,8 @@
1869	1869	shutdown the other cpus. Instead use the REBOOT_VECTOR
1870	1870	irq.
1871	1871
	1872	+ nomodule Disable module load
	1873	+
1872	1874	nopat [X86] Disable PAT (page attribute table extension of
1873	1875	pagetables) support.
1874	1876
...	...	@@ -105,6 +105,7 @@
105	105
106	106	/* Block module loading/unloading? */
107	107	int modules_disabled = 0;
	108	+core_param(nomodule, modules_disabled, bint, 0);
108	109
109	110	/* Waiting for a module to finish initializing? */
110	111	static DECLARE_WAIT_QUEUE_HEAD(module_wq);