diff options
| author | Nur Hussein <nurhussein@gmail.com> | 2008-04-29 00:58:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 08:05:59 -0700 |
| commit | 95b570c9cef3b12356454c7112571b7e406b4b51 (patch) | |
| tree | f4494412f9e3a02bce5b59a906ee9360a536191d /Documentation | |
| parent | bd3feb13e15a4859f629c9a076554e260c1d1397 (diff) | |
Taint kernel after WARN_ON(condition)
The kernel is sent to tainted within the warn_on_slowpath() function, and
whenever a warning occurs the new taint flag 'W' is set. This is useful to
know if a warning occurred before a BUG by preserving the warning as a flag
in the taint state.
This does not work on architectures where WARN_ON has its own definition.
These archs are:
1. s390
2. superh
3. avr32
4. parisc
The maintainers of these architectures have been added in the Cc: list
in this email to alert them to the situation.
The documentation in oops-tracing.txt has been updated to include the
new flag.
Signed-off-by: Nur Hussein <nurhussein@gmail.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/oops-tracing.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/oops-tracing.txt b/Documentation/oops-tracing.txt index 7f60dfe642c..b152e81da59 100644 --- a/Documentation/oops-tracing.txt +++ b/Documentation/oops-tracing.txt @@ -253,6 +253,10 @@ characters, each representing a particular tainted value. 8: 'D' if the kernel has died recently, i.e. there was an OOPS or BUG. + 9: 'A' if the ACPI table has been overridden. + + 10: 'W' if a warning has previously been issued by the kernel. + 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 |