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authorArd van Breemen <ard@telegraafnet.nl>2007-01-05 16:36:19 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2007-01-05 23:55:21 -0800
commitc4a68306b9c0939b3facdad2cc5e34d660ff463a (patch)
treecd4479ae882bb52b00d71f85956ba8e1d0fdc03b /init/main.c
parent[PATCH] Fix leds-s3c24xx hardware.h reference (diff)
downloadlinux-dev-c4a68306b9c0939b3facdad2cc5e34d660ff463a.tar.xz
linux-dev-c4a68306b9c0939b3facdad2cc5e34d660ff463a.zip
[PATCH] start_kernel: test if irq's got enabled early, barf, and disable them again
The calls made by parse_parms to other initialization code might enable interrupts again way too early. Having interrupts on this early can make systems PANIC when they initialize the IRQ controllers (which happens later in the code). This patch detects that irq's are enabled again, barfs about it and disables them again as a safety net. [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>
Diffstat (limited to 'init/main.c')
-rw-r--r--init/main.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c
index 2b1cdaab45e6..bc27d72bbb19 100644
--- a/init/main.c
+++ b/init/main.c
@@ -538,6 +538,11 @@ asmlinkage void __init start_kernel(void)
parse_args("Booting kernel", command_line, __start___param,
__stop___param - __start___param,
&unknown_bootoption);
+ if (!irqs_disabled()) {
+ printk(KERN_WARNING "start_kernel(): bug: interrupts were "
+ "enabled *very* early, fixing it\n");
+ local_irq_disable();
+ }
sort_main_extable();
trap_init();
rcu_init();