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module: add kernel param to force disable module load

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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>
This commit is contained in:
Dave Young 2012-02-01 10:33:14 +08:00 committed by Rusty Russell
parent e22057c859
commit 02608bef8f
2 changed files with 3 additions and 0 deletions
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2
Documentation/kernel-parameters.txt
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@ -1869,6 +1869,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
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.

1
kernel/module.c
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@ -105,6 +105,7 @@ struct list_head *kdb_modules = &modules; /* kdb needs the list of 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);