b2be05273a
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>
93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
#ifndef _PARISC_BUG_H
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#define _PARISC_BUG_H
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/*
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* Tell the user there is some problem.
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* The offending file and line are encoded in the __bug_table section.
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*/
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#ifdef CONFIG_BUG
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#define HAVE_ARCH_BUG
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#define HAVE_ARCH_WARN_ON
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/* the break instruction is used as BUG() marker. */
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#define PARISC_BUG_BREAK_ASM "break 0x1f, 0x1fff"
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#define PARISC_BUG_BREAK_INSN 0x03ffe01f /* PARISC_BUG_BREAK_ASM */
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#if defined(CONFIG_64BIT)
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#define ASM_WORD_INSN ".dword\t"
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#else
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#define ASM_WORD_INSN ".word\t"
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#endif
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#ifdef CONFIG_DEBUG_BUGVERBOSE
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#define BUG() \
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do { \
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asm volatile("\n" \
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"1:\t" PARISC_BUG_BREAK_ASM "\n" \
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"\t.pushsection __bug_table,\"a\"\n" \
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"2:\t" ASM_WORD_INSN "1b, %c0\n" \
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"\t.short %c1, %c2\n" \
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"\t.org 2b+%c3\n" \
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"\t.popsection" \
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: : "i" (__FILE__), "i" (__LINE__), \
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"i" (0), "i" (sizeof(struct bug_entry)) ); \
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unreachable(); \
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} while(0)
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#else
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#define BUG() \
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do { \
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asm volatile(PARISC_BUG_BREAK_ASM : : ); \
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unreachable(); \
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} while(0)
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#endif
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#ifdef CONFIG_DEBUG_BUGVERBOSE
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#define __WARN_TAINT(taint) \
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do { \
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asm volatile("\n" \
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"1:\t" PARISC_BUG_BREAK_ASM "\n" \
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"\t.pushsection __bug_table,\"a\"\n" \
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"2:\t" ASM_WORD_INSN "1b, %c0\n" \
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"\t.short %c1, %c2\n" \
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"\t.org 2b+%c3\n" \
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"\t.popsection" \
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: : "i" (__FILE__), "i" (__LINE__), \
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"i" (BUGFLAG_TAINT(taint)), \
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"i" (sizeof(struct bug_entry)) ); \
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} while(0)
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#else
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#define __WARN_TAINT(taint) \
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do { \
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asm volatile("\n" \
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"1:\t" PARISC_BUG_BREAK_ASM "\n" \
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"\t.pushsection __bug_table,\"a\"\n" \
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"2:\t" ASM_WORD_INSN "1b\n" \
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"\t.short %c0\n" \
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"\t.org 2b+%c1\n" \
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"\t.popsection" \
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: : "i" (BUGFLAG_TAINT(taint)), \
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"i" (sizeof(struct bug_entry)) ); \
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} while(0)
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#endif
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#define WARN_ON(x) ({ \
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int __ret_warn_on = !!(x); \
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if (__builtin_constant_p(__ret_warn_on)) { \
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if (__ret_warn_on) \
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__WARN(); \
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} else { \
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if (unlikely(__ret_warn_on)) \
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__WARN(); \
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} \
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unlikely(__ret_warn_on); \
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})
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#endif
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#include <asm-generic/bug.h>
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#endif
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