ACPI: Handle CONFIG_ACPI=n better from linux/acpi.h

linux/acpi.h is the top level header for interfacing
with the ACPI sub-system, so acpi_disabled should be
up there instead of down in asm/acpi.h -- particularly
since asm/acpi.h doesn't exist for all architectures.

Same story for acpi_table_parse(), which is a top-level
API to Linux/ACPI.

This is necessary for building some code that
used to always depend on CONFIG_ACPI=y, but will soon
also need to build with CONFIG_ACPI=n.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 34321cfffeab..3fce811bf9ac 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -292,7 +292,10 @@ void __init acpi_s4_no_nvs(void);
 extern acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags);
 extern void acpi_early_init(void);
 
-#else   /* CONFIG_ACPI */
+#else   /* !CONFIG_ACPI */
+
+#define acpi_disabled 1
+
 static inline void acpi_early_init(void) { }
 
 static inline int early_acpi_boot_init(void)
@@ -331,5 +334,11 @@ static inline int acpi_check_mem_region(resource_size_t start,
         return 0;
 }
 
+struct acpi_table_header;
+static inline int acpi_table_parse(char *id,
+                                int (*handler)(struct acpi_table_header *))
+{
+        return -1;
+}
 #endif  /* !CONFIG_ACPI */
 #endif  /*_LINUX_ACPI_H*/