linux-kernel - Re: [PATCH 1/4] Make vsyscall_gtod

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Message-ID: <1391266284.964.1.camel@wall-e.seibold.net>
Date:	Sat, 01 Feb 2014 15:51:24 +0100
From:	Stefani Seibold <stefani@...bold.net>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	x86@...nel.org, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com, aarcange@...hat.com, john.stultz@...aro.org,
	luto@...capital.net, xemul@...allels.com, gorcunov@...nvz.org,
	andriy.shevchenko@...ux.intel.com, Martin.Runge@...de-schwarz.com,
	Andreas.Brief@...de-schwarz.com
Subject: Re: [PATCH 1/4] Make vsyscall_gtod_data handling x86 generic

Am Donnerstag, den 30.01.2014, 16:10 -0800 schrieb Andi Kleen:
> > @@ -1335,7 +1335,6 @@ config ARCH_SPARSEMEM_ENABLE
> >  
> >  config ARCH_SPARSEMEM_DEFAULT
> >  	def_bool y
> > -	depends on X86_64
> 
> Is that really needed? Why does the vdso need sparsemem?
> 

No, it is from the previous patch. I will fix it.

> >  
> >  static inline void __user *arch_compat_alloc_user_space(long len)
> >  {
> > +#ifdef CONFIG_X86_32
> > +	struct pt_regs *regs = task_pt_regs(current);
> > +	return (void __user *)regs->sp - len;
> > +#else
> >  	compat_uptr_t sp;
> 
> and that? why does a vdso need to allocate things on the user page?
> 

Will also fixed, compat.h will not longer include by vsyscall_gtod.c.


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