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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 <[email protected]>
Acked-by: Helge Deller <[email protected]>
Tested-by: Paul Mundt <[email protected]>
Signed-off-by: David Woodhouse <[email protected]>
This commit is contained in:
Ben Hutchings 2010-04-03 19:34:56 +01:00 • committed by David Woodhouse
commit b2be05273a
8 changed files with 67 additions and 20 deletions
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4
arch/sh/include/asm/bug.h
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@ -48,7 +48,7 @@ do { \
"i" (sizeof(struct bug_entry))); \
} while (0)
#define __WARN() \
#define __WARN_TAINT(taint) \
do { \
__asm__ __volatile__ ( \
"1:\t.short %O0\n" \
@ -57,7 +57,7 @@ do { \
: "n" (TRAPA_BUG_OPCODE), \
"i" (__FILE__), \
"i" (__LINE__), \
"i" (BUGFLAG_WARNING), \
"i" (BUGFLAG_TAINT(taint)), \
"i" (sizeof(struct bug_entry))); \
} while (0)