diff options
Diffstat (limited to 'drivers/acpi/acpica/psloop.c')
| -rw-r--r-- | drivers/acpi/acpica/psloop.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/acpi/acpica/psloop.c b/drivers/acpi/acpica/psloop.c index 5981b65cd3d3..68422afc365f 100644 --- a/drivers/acpi/acpica/psloop.c +++ b/drivers/acpi/acpica/psloop.c @@ -136,10 +136,18 @@ acpi_ps_get_arguments(struct acpi_walk_state *walk_state, walk_state->pass_number)); /* - * Handle executable code at "module-level". This refers to - * executable opcodes that appear outside of any control method. + * This case handles the legacy option that groups all module-level + * code blocks together and defers execution until all of the tables + * are loaded. Execute all of these blocks at this time. + * Execute any module-level code that was detected during the table + * load phase. + * + * Note: this option is deprecated and will be eliminated in the + * future. Use of this option can cause problems with AML code that + * depends upon in-order immediate execution of module-level code. */ - if ((walk_state->pass_number <= ACPI_IMODE_LOAD_PASS2) && + if (acpi_gbl_group_module_level_code && + (walk_state->pass_number <= ACPI_IMODE_LOAD_PASS2) && ((walk_state->parse_flags & ACPI_PARSE_DISASSEMBLE) == 0)) { /* * We want to skip If/Else/While constructs during Pass1 because we @@ -306,6 +314,16 @@ acpi_ps_get_arguments(struct acpi_walk_state *walk_state, * object to the global list. Note, the mutex field of the method * object is used to link multiple module-level code objects. * + * NOTE: In this legacy option, each block of detected executable AML + * code that is outside of any control method is wrapped with a temporary + * control method object and placed on a global list below. + * + * This function executes the module-level code for all tables only after + * all of the tables have been loaded. It is a legacy option and is + * not compatible with other ACPI implementations. See acpi_ns_load_table. + * + * This function will be removed when the legacy option is removed. + * ******************************************************************************/ static void |