Remove sysctl warning about writable directory

Getting this when booting 2.6.24-rc2:

sysctl table check failed: /kernel .1 Writable sysctl directory

Call Trace:
[c000000002047b60] [c00000000000e204] .show_stack+0x54/0x1f0 (unreliable)
[c000000002047c10] [c00000000006ea50] .set_fail+0x60/0x90
[c000000002047ca0] [c00000000006ef64] .sysctl_check_table+0x4e4/0x730
[c000000002047d80] [c000000000055860] .register_sysctl_table+0x80/0x120
[c000000002047e20] [c0000000005de924] .register_powersave_nap_sysctl+0x14/0x30
[c000000002047e90] [c0000000005d58c8] .kernel_init+0x1f8/0x450
[c000000002047f90] [c000000000023bac] .kernel_thread+0x4c/0x68

index abd2957..c3cf0e8 100644
@@ -122,7 +122,7 @@ static ctl_table powersave_nap_sysctl_root[] = {
 	{
 		.ctl_name	= CTL_KERN,
 		.procname	= "kernel",
-		.mode		= 0755,
+		.mode		= 0555,
 		.child		= powersave_nap_ctl_table,
 	},
 	{}