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SubjectParavirt compile failure with gcc33

As I was compile-testing 2.6.33-rc with gcc-3.3,
binutils-2.19.51-10.26.4.x86_64, I observed a failure when
CONFIG_PARAVIRT is turned on:

[any file]
/home/jengelh/code/linux/arch/x86/include/asm/paravirt.h: In function
/home/jengelh/code/linux/arch/x86/include/asm/paravirt.h:763: warning:
asm operand 5 probably doesn't match constraints
/home/jengelh/code/linux/arch/x86/include/asm/paravirt.h:858: warning:
asm operand 2 probably doesn't match constraints
/home/jengelh/code/linux/arch/x86/include/asm/paravirt.h:763: error:
impossible constraint in `asm'
/home/jengelh/code/linux/arch/x86/include/asm/paravirt.h:858: error:
impossible constraint in `asm'

Disabling either PARAVIRT or using GCC4.x works around this.

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