[ACPI] [PATCH 1/1] make acpi_path_name() global (v4)

[Randy D. <ran...@li...>]

From: Randy Dunlap <ran...@li...>

Make acpi_path_name() usable by everyone.
I need this for adding SATA suspend/resume ACPI support.

v4: Fix enter/exit trace error noted by Matthew Wilcox.
v3: use EXPORT_SYMBOL_GPL for acpi_path_name.
v2: use ACPI-CA calling convention for name buffer.

Signed-off-by: Randy Dunlap <ran...@li...>
---
 drivers/acpi/osl.c      |   21 +++++++++++++++++++++
 include/acpi/acpiosxf.h |    2 ++
 2 files changed, 23 insertions(+)

--- linux-2615-rc6-acpi.orig/drivers/acpi/osl.c
+++ linux-2615-rc6-acpi/drivers/acpi/osl.c
@@ -1078,6 +1078,27 @@ void acpi_os_release_lock(acpi_handle ha
 	spin_unlock_irqrestore((spinlock_t *) handle, flags);
 }
 
+/**
+ * acpi_path_name - get ACPI path_name for the given handle
+ * @handle: ACPI object handle to look up name of
+ * @namebuf: acpi_buffer with input flags and output name
+ *
+ * Caller can allocate & free the output name buffer or can set
+ * namebuf.length to ACPI_ALLOCATE_BUFFER to have ACPI-CA allocate
+ * the buffer but caller is still responsible for freeing it.
+ *
+ * Returns: status of acpi_get_name()
+ */
+acpi_status acpi_path_name(acpi_handle handle, struct acpi_buffer *namebuf)
+{
+	acpi_status		status;
+
+	status = acpi_get_name(handle, ACPI_FULL_PATHNAME, namebuf);
+
+	return status;
+}
+EXPORT_SYMBOL_GPL(acpi_path_name);
+
 #ifndef ACPI_USE_LOCAL_CACHE
 
 /*******************************************************************************
--- linux-2615-rc6-acpi.orig/include/acpi/acpiosxf.h
+++ linux-2615-rc6-acpi/include/acpi/acpiosxf.h
@@ -112,6 +112,8 @@ unsigned long acpi_os_acquire_lock(acpi_
 
 void acpi_os_release_lock(acpi_handle handle, unsigned long flags);
 
+acpi_status acpi_path_name(acpi_handle handle, struct acpi_buffer *namebuf);
+
 /*
  * Memory allocation and mapping
  */


---