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xen: Rename the balloon lock

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* 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>
This commit is contained in:
Alex Nixon
2009-02-09 12:05:46 -08:00
committed by Konrad Rzeszutek Wilk
parent 7347b4082e
commit 19001c8c5b
3 changed files with 19 additions and 11 deletions
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7
arch/x86/xen/mmu.c
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@@ -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 {