RE: [Xen-devel] compiler errors in latest unstable from 20051027

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Adam Heath
> Sent: 09 November 2005 17:23
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] compiler errors in latest unstable from 20051027

Why are you using unstable from 20051027 rather than today? A week is a
long time in the unstable tree, and there have definitely been patches
in this area.

Ian

> If CONFIG_SMP_ALTERNATIVES is selected, 
> arch/xen/kernel/smpboot.c attempts to include 
> <asm/smp_boot.h>, which does not exist anywhere.  Which means 
> selecting that is not allowed.
> 
> However, there are several additional unprotected includes of 
> that same file in other places; 
> include/asm-xen/asm-i386/system.h and 
> include/asm-xen/asm-i386/spinlock.h.
> 
> Plus, there is a complaint about LOCK not being defined in 
> include/asm-xen/asm/system.h.  If I add include 
> <asm/atomic.h>, it gets by the first such error, but then I 
> get this later on:
> 
> ==
> In file included from include/asm-xen/asm/processor.h:18,
>                  from include/asm/atomic.h:6,
>                  from kernel/audit.c:45:
> include/asm-xen/asm/system.h: In function `__cmpxchg':
> include/asm-xen/asm/system.h:259: error: `LOCK' undeclared 
> (first use in this
> function)
> ==
> 
> This is because asm/system.h is being included recursively, 
> so none of the defines in asm/atomic.h are defined yet.
> 
> The steps I took to repeat this:
> 
> 1: apt-get install lkinux-tree-2.6.12
> 2: /usr/src/kernel-patches/all/2.6.12/unpatch/debian 2.6.12
>    # this gives a real 2.6.12 tree
> 3: cd linux-2.6-sparse
> 4: ./mkbuildtree $path_to_linux
>    # this applies the 2.6.12.6 patch, then overlays the xen 
> code on top of it.
> 5: create diff between xen-patched linux and plain 2.6.12.6
> 6: Go to another machine
> 7: extract 2.6.12, apply 2.6.12.6; no warnings from diff during this
> 8: apply xen patch; no warnings from diff during this
> 9: make menuconfig ARCH=xen
> 10: error as above
> 
> 
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