aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/xen/mmu.c
diff options
context:
space:
mode:
authorAlex Nixon <alex.nixon@citrix.com>2009-02-09 12:05:46 -0800
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2010-06-07 14:34:07 -0400
commit19001c8c5bfa032ed45b10dfe48e355f5df88c61 (patch)
tree07ca3058406ef30539a4b462b0891b8f8b797ab7 /arch/x86/xen/mmu.c
parent7347b4082e55ac4a673f06a0a0ce25c37273c9ec (diff)
downloadlinux-linaro-android-19001c8c5bfa032ed45b10dfe48e355f5df88c61.tar.gz
xen: Rename the balloon lock
* xen_create_contiguous_region needs access to the balloon lock to ensure memory doesn't change under its feet, so expose the balloon lock * Change the name of the lock to xen_reservation_lock, to imply it's now less-specific usage. [ Impact: cleanup ] Signed-off-by: Alex Nixon <alex.nixon@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86/xen/mmu.c')
-rw-r--r--arch/x86/xen/mmu.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index a5577f59416..9e0d82fc21e 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -70,6 +70,13 @@
#define MMU_UPDATE_HISTO 30
+/*
+ * Protects atomic reservation decrease/increase against concurrent increases.
+ * Also protects non-atomic updates of current_pages and driver_pages, and
+ * balloon lists.
+ */
+DEFINE_SPINLOCK(xen_reservation_lock);
+
#ifdef CONFIG_XEN_DEBUG_FS
static struct {