path: root/kernel
diff options
authorArd van Breemen <>2007-01-05 16:36:20 -0800
committerLinus Torvalds <>2007-01-05 23:55:21 -0800
commita416aba637dcb4127595c02a59041cd278422f7e (patch)
treee99c948c07e42e6e387bc84260e456e55a0fbd60 /kernel
parentc4a68306b9c0939b3facdad2cc5e34d660ff463a (diff)
[PATCH] kernelparams: detect if and which parameter parsing enabled irq's
The parsing of some kernel parameters seem to enable irq's at a stage that irq's are not supposed to be enabled (Particularly the ide kernel parameters). Having irq's enabled before the irq controller is initialized might lead to a kernel panic. This patch only detects this behaviour and warns about wich parameter caused it. [ cleanups] Signed-off-by: Ard van Breemen <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'kernel')
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/params.c b/kernel/params.c
index f406655d6653..718945da8f58 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -143,9 +143,15 @@ int parse_args(const char *name,
while (*args) {
int ret;
+ int irq_was_disabled;
args = next_arg(args, &param, &val);
+ irq_was_disabled = irqs_disabled();
ret = parse_one(param, val, params, num, unknown);
+ if (irq_was_disabled && !irqs_disabled()) {
+ printk(KERN_WARNING "parse_args(): option '%s' enabled "
+ "irq's!\n", param);
+ }
switch (ret) {
case -ENOENT:
printk(KERN_ERR "%s: Unknown parameter `%s'\n",