[ACPI] S3 resume: avoid kmalloc() might_sleep oops symptom

ACPI now uses kmalloc(...,GPF_ATOMIC) during suspend/resume.

http://bugzilla.kernel.org/show_bug.cgi?id=3469

Signed-off-by: David Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/osl.c

@@ -145,10 +145,14 @@ acpi_os_vprintf(const char *fmt, va_list args)
 #endif
 }
 
+extern int acpi_in_resume;
 void *
 acpi_os_allocate(acpi_size size)
 {
-	return kmalloc(size, GFP_KERNEL);
+	if (acpi_in_resume)
+		return kmalloc(size, GFP_ATOMIC);
+	else
+		return kmalloc(size, GFP_KERNEL);
 }
 
 void