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| author | Bob Moore <robert.moore@intel.com> | 2013-04-12 00:25:41 (GMT) |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-04-12 11:29:48 (GMT) |
| commit | 58892c962a0f8b7187b036e787223365864bde3f (patch) | |
| tree | fcf84c2f3f4152331aa0536e0819f3067fa3b369 /drivers/acpi/acpica/acglobal.h | |
| parent | 475df486f5191ce0671b99aff029b38bff7a72f1 (diff) | |
| download | linux-58892c962a0f8b7187b036e787223365864bde3f.tar.xz | |
ACPICA: Add a lock to the internal object reference count mechanism
Certain external interfaces need to update object references
without holding the interpreter or namespace mutex objects. To
prevent race conditions, add a spinlock around the increment
and decrement of the reference counts for internal ACPI
objects. Reported by Andriy Gapon (avg@FreeBSD.org).
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Andriy Gapon <avg@FreeBSD.org>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/acglobal.h')
| -rw-r--r-- | drivers/acpi/acpica/acglobal.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h index 833fbc5..0716092 100644 --- a/drivers/acpi/acpica/acglobal.h +++ b/drivers/acpi/acpica/acglobal.h @@ -224,6 +224,7 @@ ACPI_EXTERN u8 acpi_gbl_global_lock_pending; */ ACPI_EXTERN acpi_spinlock acpi_gbl_gpe_lock; /* For GPE data structs and registers */ ACPI_EXTERN acpi_spinlock acpi_gbl_hardware_lock; /* For ACPI H/W except GPE registers */ +ACPI_EXTERN acpi_spinlock acpi_gbl_reference_count_lock; /* Mutex for _OSI support */ |