From: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon, 1 Mar 2010 18:52:45 +0000 (-0500)
Subject: define sync_core for x86 PIC
X-Git-Tag: v0.4.2~17
X-Git-Url: https://git.liburcu.org/?a=commitdiff_plain;h=dac93f5961f305a3bd08cd82f649a7a4dcf6e3eb;hp=dac93f5961f305a3bd08cd82f649a7a4dcf6e3eb;p=urcu.git

define sync_core for x86 PIC

Pushing/popping the reserved ebx register is surely less expensive
than a memory barrier.

Note that since ebx is a callee-save register, this is even safe for
signals (i.e. it would be safe even if we needed the value that cpuid
puts in %%ebx).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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