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[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.

[akpm@osdl.org: cleanups]
Signed-off-by: Ard van Breemen <ard@telegraafnet.nl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ard van Breemen 2007-01-05 16:36:20 -08:00 committed by Linus Torvalds
parent c4a68306b9
commit a416aba637
1 changed files with 6 additions and 0 deletions
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6
kernel/params.c
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@ -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",