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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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8
arch/s390/include/asm/bug.h
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@ -46,18 +46,18 @@
unreachable(); \
} while (0)
#define __WARN() do { \
__EMIT_BUG(BUGFLAG_WARNING); \
#define __WARN_TAINT(taint) do { \
__EMIT_BUG(BUGFLAG_TAINT(taint)); \
} while (0)
#define WARN_ON(x) ({ \
int __ret_warn_on = !!(x); \
if (__builtin_constant_p(__ret_warn_on)) { \
if (__ret_warn_on) \
__EMIT_BUG(BUGFLAG_WARNING); \
__WARN(); \
} else { \
if (unlikely(__ret_warn_on)) \
__EMIT_BUG(BUGFLAG_WARNING); \
__WARN(); \
} \
unlikely(__ret_warn_on); \
})