Re: [PATCH] rcu: remove unused variable in boot_cpu_state_init

From: Ingo Molnar
Date: Thu Jun 22 2017 - 03:59:44 EST

So, to continue this side thought about uninitialized_var(), it is dangerous
because the following buggy pattern does not generate a compiler warning:

long uninitialized_var(error);


if (error)
return error;

... and still there are over 290 uses of uninitialized_var() in the kernel - and
any of them could turn into a silent but real uninitialized variable bugs due to
subsequent changes.