linux-kernel - Re: [BUG] [ tip/sched/core ] System unresponsive after booting

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Message-ID: <20140115103949.GZ31570@twins.programming.kicks-ass.net>
Date:	Wed, 15 Jan 2014 11:39:49 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Daniel Lezcano <daniel.lezcano@...aro.org>, raistlin@...ux.it,
	juri.lelli@...il.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] [ tip/sched/core ] System unresponsive after booting

On Wed, Jan 15, 2014 at 10:22:45AM +0100, Ingo Molnar wrote:
> 3)
> 
> On ARM:
> 
> -#define __NR_syscalls  (380)
> +#define __NR_syscalls  (384)
> 
> but:
> 
>  #define __NR_finit_module              (__NR_SYSCALL_BASE+379)
> +#define __NR_sched_setattr             (__NR_SYSCALL_BASE+380)
> +#define __NR_sched_getattr             (__NR_SYSCALL_BASE+381)
>  
>  /*
> 
> 
> Why is the syscall table increased by 4, while we only add 2 new 
> syscalls?

arch/arm/kernel/entry-common.S:.ifne NR_syscalls - __NR_syscalls
arch/arm/kernel/calls.S:.equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls

Totally confusing, I know.
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