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panic: Allow warnings to set different taint flags

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WARN() is used in some places to report firmware or hardware bugs that
are then worked-around.  These bugs do not affect the stability of the
kernel and should not set the flag for TAINT_WARN.  To allow for this,
add WARN_TAINT() and WARN_TAINT_ONCE() macros that take a taint number
as argument.

Architectures that implement warnings using trap instructions instead
of calls to warn_slowpath_*() now implement __WARN_TAINT(taint)
instead of __WARN().

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Acked-by: Helge Deller <deller@gmx.de>
Tested-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Ben Hutchings 2010-04-03 19:34:56 +01:00 • committed by David Woodhouse
parent 8954da1f82
commit b2be05273a
8 changed files with 67 additions and 20 deletions
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2
lib/bug.c
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@ -165,7 +165,7 @@ enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs)
(void *)bugaddr);
show_regs(regs);
add_taint(TAINT_WARN);
add_taint(BUG_GET_TAINT(bug));
return BUG_TRAP_TYPE_WARN;
}