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authorJeremy Fitzhardinge <jeremy@xensource.com>2007-10-16 11:51:30 -0700
committerJeremy Fitzhardinge <jeremy@goop.org>2007-10-16 11:51:30 -0700
commit91e0c5f3dad47838cb2ecc1865ce789a0b7182b1 (patch)
tree8c72d3f7bd574088fc457f0ce2117d6d986dac2c /arch/x86/xen/multicalls.h
parentf0d733942750c1ee6358c3a4a1a5d7ba73b7122f (diff)
xen: add batch completion callbacks
This adds a mechanism to register a callback function to be called once a batch of hypercalls has been issued. This is typically used to unlock things which must remain locked until the hypercall has taken place. [ Stable folks: pre-req for 2.6.23 bugfix "xen: deal with stale cr3 values when unpinning pagetables" ] Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Stable Kernel <stable@kernel.org>
Diffstat (limited to 'arch/x86/xen/multicalls.h')
-rw-r--r--arch/x86/xen/multicalls.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/xen/multicalls.h b/arch/x86/xen/multicalls.h
index 5d96a5fa210c..8bae996d99a3 100644
--- a/arch/x86/xen/multicalls.h
+++ b/arch/x86/xen/multicalls.h
@@ -42,4 +42,7 @@ static inline void xen_mc_issue(unsigned mode)
local_irq_restore(x86_read_percpu(xen_mc_irq_flags));
}
+/* Set up a callback to be called when the current batch is flushed */
+void xen_mc_callback(void (*fn)(void *), void *data);
+
#endif /* _XEN_MULTICALLS_H */