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Commit 92946bc7 authored by Ben Hutchings's avatar Ben Hutchings Committed by David Woodhouse
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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: default avatarBen Hutchings <ben@decadent.org.uk>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent b2be0527

Documentation/oops-tracing.txt

+3 −0
Original line number Diff line number Diff line
@@ -260,6 +260,9 @@ characters, each representing a particular tainted value. 


 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

include/linux/kernel.h

+1 −0
Original line number Diff line number Diff line
@@ -344,6 +344,7 @@ extern enum system_states { 
#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;

kernel/panic.c

+2 −0
Original line number Diff line number Diff line
@@ -178,6 +178,7 @@ static const struct tnt tnts[] = { 
	{ TAINT_OVERRIDDEN_ACPI_TABLE,	'A', ' ' },

	{ TAINT_WARN,			'W', ' ' },

	{ TAINT_CRAP,			'C', ' ' },

	{ TAINT_FIRMWARE_WORKAROUND,	'I', ' ' },

};



/**
@@ -194,6 +195,7 @@ static const struct tnt tnts[] = { 
 *  '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().

 */