From: Dave Young Subject: add kernel param to force disable module load Date: Wed, 1 Feb 2012 10:33:14 +0800 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 Cc: Rusty Russell Signed-off-by: Rusty Russell --- Documentation/kernel-parameters.txt | 2 ++ kernel/module.c | 1 + 2 files changed, 3 insertions(+) --- linux-2.6.orig/Documentation/kernel-parameters.txt 2012-01-31 13:07:06.000000000 +0800 +++ linux-2.6/Documentation/kernel-parameters.txt 2012-01-31 13:07:09.393362159 +0800 @@ -1833,6 +1833,8 @@ bytes respectively. Such letter suffixes 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. --- linux-2.6.orig/kernel/module.c 2012-01-31 13:07:06.000000000 +0800 +++ linux-2.6/kernel/module.c 2012-01-31 13:07:34.196695573 +0800 @@ -105,6 +105,7 @@ struct list_head *kdb_modules = &modules /* 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);