panic: Add taint flag TAINT_FIRMWARE_WORKAROUND ('I')
This taint flag will initially be used when warning about invalid ACPI
DMAR tables.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/Documentation/oops-tracing.txt b/Documentation/oops-tracing.txt
index 069fab3..6fe9001 100644
--- a/Documentation/oops-tracing.txt
+++ b/Documentation/oops-tracing.txt
@@ -260,6 +260,9 @@
11: 'C' if a staging driver has been loaded.
+ 12: 'I' if the kernel is working around a severe bug in the platform
+ firmware (BIOS or similar).
+
The primary reason for the 'Tainted: ' string is to tell kernel
debuggers if this is a clean kernel or if anything unusual has
occurred. Tainting is permanent: even if an offending module is
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 7f07074..7f2f7b3 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -344,6 +344,7 @@
#define TAINT_OVERRIDDEN_ACPI_TABLE 8
#define TAINT_WARN 9
#define TAINT_CRAP 10
+#define TAINT_FIRMWARE_WORKAROUND 11
extern void dump_stack(void) __cold;
diff --git a/kernel/panic.c b/kernel/panic.c
index 8b821bc..dbe13db 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -178,6 +178,7 @@
{ TAINT_OVERRIDDEN_ACPI_TABLE, 'A', ' ' },
{ TAINT_WARN, 'W', ' ' },
{ TAINT_CRAP, 'C', ' ' },
+ { TAINT_FIRMWARE_WORKAROUND, 'I', ' ' },
};
/**
@@ -194,6 +195,7 @@
* 'A' - ACPI table overridden.
* 'W' - Taint on warning.
* 'C' - modules from drivers/staging are loaded.
+ * 'I' - Working around severe firmware bug.
*
* The string is overwritten by the next call to print_tainted().
*/