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ACPICA: Namespace: simplify creation of the initial/default namespace

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ACPICA commit 76658f55d8cc498a763bdb92f8e0d934822a129c

For the objects that are created by default (_GPE, _SB_, etc)
there is no need to use the heavyweight ns_lookup function.
Instead, simply create each object and link it in as the namespace
is built.

Link: https://github.com/acpica/acpica/commit/76658f55
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore 2019-07-03 13:15:36 -07:00 committed by Rafael J. Wysocki
parent d4ca763eed
commit f79c8e4136
1 changed files with 43 additions and 11 deletions
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54
drivers/acpi/acpica/nsaccess.c
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@ -36,6 +36,7 @@ acpi_status acpi_ns_root_initialize(void)
acpi_status status;
const struct acpi_predefined_names *init_val = NULL;
struct acpi_namespace_node *new_node;
struct acpi_namespace_node *prev_node = NULL;
union acpi_operand_object *obj_desc;
acpi_string val = NULL;
@ -61,12 +62,28 @@ acpi_status acpi_ns_root_initialize(void)
*/
acpi_gbl_root_node = &acpi_gbl_root_node_struct;
/* Enter the pre-defined names in the name table */
/* Enter the predefined names in the name table */
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Entering predefined entries into namespace\n"));
/*
* Create the initial (default) namespace.
* This namespace looks like something similar to this:
*
* ACPI Namespace (from Namespace Root):
* 0 _GPE Scope 00203160 00
* 0 _PR_ Scope 002031D0 00
* 0 _SB_ Device 00203240 00 Notify Object: 0020ADD8
* 0 _SI_ Scope 002032B0 00
* 0 _TZ_ Device 00203320 00
* 0 _REV Integer 00203390 00 = 0000000000000002
* 0 _OS_ String 00203488 00 Len 14 "Microsoft Windows NT"
* 0 _GL_ Mutex 00203580 00 Object 002035F0
* 0 _OSI Method 00203678 00 Args 1 Len 0000 Aml 00000000
*/
for (init_val = acpi_gbl_pre_defined_names; init_val->name; init_val++) {
status = AE_OK;
/* _OSI is optional for now, will be permanent later */
@ -75,17 +92,32 @@ acpi_status acpi_ns_root_initialize(void)
continue;
}
status =
acpi_ns_lookup(NULL, ACPI_CAST_PTR(char, init_val->name),
init_val->type, ACPI_IMODE_LOAD_PASS2,
ACPI_NS_NO_UPSEARCH, NULL, &new_node);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Could not create predefined name %s",
init_val->name));
continue;
/*
* Create, init, and link the new predefined name
* Note: No need to use acpi_ns_lookup here because all the
* predefined names are at the root level. It is much easier to
* just create and link the new node(s) here.
*/
new_node =
ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_namespace_node));
if (!new_node) {
status = AE_NO_MEMORY;
goto unlock_and_exit;
}
ACPI_COPY_NAMESEG(new_node->name.ascii, init_val->name);
new_node->descriptor_type = ACPI_DESC_TYPE_NAMED;
new_node->type = init_val->type;
if (!prev_node) {
acpi_gbl_root_node_struct.child = new_node;
} else {
prev_node->peer = new_node;
}
new_node->parent = &acpi_gbl_root_node_struct;
prev_node = new_node;
/*
* Name entered successfully. If entry in pre_defined_names[] specifies
* an initial value, create the initial value.
@ -131,7 +163,7 @@ acpi_status acpi_ns_root_initialize(void)
new_node->value = obj_desc->method.param_count;
#else
/* Mark this as a very SPECIAL method */
/* Mark this as a very SPECIAL method (_OSI) */
obj_desc->method.info_flags =
ACPI_METHOD_INTERNAL_ONLY;