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    SubjectRe: [patch 12/26] Xen-paravirt_ops: Fix patch site clobbers to include return register
    Jeremy Fitzhardinge wrote:
    > Fix a few clobbers to include the return register. The clobbers set
    > is the set of all registers modified (or may be modified) by the code
    > snippet, regardless of whether it was deliberate or accidental.
    >
    > Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
    > Cc: Rusty Russell <rusty@rustcorp.com.au>
    > Cc: Zachary Amsden <zach@vmware.com>
    >
    > ---
    > include/asm-i386/paravirt.h | 4 ++--
    > 1 file changed, 2 insertions(+), 2 deletions(-)
    >
    > ===================================================================
    > --- a/include/asm-i386/paravirt.h
    > +++ b/include/asm-i386/paravirt.h
    > @@ -556,7 +556,7 @@ static inline unsigned long __raw_local_
    > "popl %%edx; popl %%ecx")
    > : "=a"(f): "m"(paravirt_ops.save_fl),
    > paravirt_type(PARAVIRT_PATCH(save_fl)),
    > - paravirt_clobber(CLBR_NONE)
    > + paravirt_clobber(CLBR_EAX)
    > : "memory", "cc");
    > return f;
    >

    Has this been tested on older gcc's? I seem to recall them barfing over
    things like this.

    Zach
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