Re: [PATCH 1/7] paravirtualization: header and stubs for paravirtualizingcritical operations

[Zachary Amsden]

Andi Kleen wrote:
> On Wednesday 01 November 2006 11:27, Rusty Russell wrote:
>   
> > Create a paravirt.h header for all the critical operations which need
> > to be replaced with hypervisor calls, and include that instead of
> > defining native operations, when CONFIG_PARAVIRT.
> >     
>
> Hmm, did this all ever compile in mainline? I had to do a few merges
> and in the end i get
>
> /home/lsrc/quilt/linux/kernel/spinlock.c: In function â_spin_lock_irqsaveâ:
> include2/asm/spinlock.h:59: error: invalid 'asm': operand number missing after %
> -letter
> include2/asm/spinlock.h:59: error: invalid 'asm': operand number missing after %
> -letter
> include2/asm/spinlock.h:59: error: invalid 'asm': operand number missing after %
> -letter
> include2/asm/spinlock.h:59: error: invalid 'asm': operand number missing after %
> -letter
> include2/asm/spinlock.h:59: error: invalid 'asm': operand number missing after %
> -letter
> include2/asm/spinlock.h:59: error: invalid 'asm': operand number missing after %
> -letter
> include2/asm/spinlock.h:59: error: invalid 'asm': operand number missing after %
> -letter
> include2/asm/spinlock.h:59: error: invalid 'asm': operand number missing after %
> -letter
> {standard input}: Assembler messages:
> {standard input}:593: Error: undefined symbol `paravirt_ops' in operation
> {standard input}:593: Error: undefined symbol `PARAVIRT_irq_enable' in operation
> {standard input}:605: Error: undefined symbol `paravirt_ops' in operation
> {standard input}:605: Error: undefined symbol `PARAVIRT_irq_disable' in operatio
> n
>   

Not seeing that here (on 2.6.19-rc2-mm2 with gcc 4.0.2).

> and lots of new warnings like
>
> /home/lsrc/quilt/linux/arch/i386/kernel/traps.c: In function âset_intr_gateâ:
> /home/lsrc/quilt/linux/arch/i386/kernel/traps.c:1165: warning: implicit declarat
> ion of function â_set_gateâ
> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/common.c: In function â_cpu_initâ:
> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/common.c:754: warning: implicit decl
> aration of function â__set_tss_desc'
>   

Sounds like desc.h got reordered.  Somewhere, there was a broken patch 
once that did this, I thought we fixed that.

> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/mcheck/p4.c: In function âintel_mach
> ine_checkâ:
> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/mcheck/p4.c:158: warning: âdbg.eaxâ 
> may be used uninitialized in this function
> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/mcheck/p4.c:158: warning: âdbg.ebxâ 
> may be used uninitialized in this function
> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/mcheck/p4.c:158: warning: âdbg.ecxâ 
> may be used uninitialized in this function
> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/mcheck/p4.c:158: warning: âdbg.edxâ 
> may be used uninitialized in this function
> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/mcheck/p4.c:158: warning: âdbg.esiâ 
> may be used uninitialized in this function
> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/mcheck/p4.c:158: warning: âdbg.ediâ 
> may be used uninitialized in this function
> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/mcheck/p4.c:158: warning: âdbg.ebpâ 
> may be used uninitialized in this function
> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/mcheck/p4.c:158: warning: âdbg.espâ 
> may be used uninitialized in this function
> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/mcheck/p4.c:158: warning: âdbg.eflag
> sâ may be used uninitialized in this function
> /home/lsrc/quilt/linux/arch/i386/kernel/cpu/mcheck/p4.c:158: warning: âdbg.eipâ 
> may be used uninitialized in this function
>   

Those appear to be valid warnings, with or without paravirt, due to the 
tacky glued inline oddity of intel_get_extended_msrs.

Zach
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