bc6245e5ef
Including <linux/bug.h> pulls in a lot of bloat from <asm/bug.h> and <asm-generic/bug.h> that is not needed to call the BUILD_BUG() family of macros. Split them out into their own header, <linux/build_bug.h>. Also correct some checkpatch.pl errors for the BUILD_BUG_ON_ZERO() and BUILD_BUG_ON_NULL() macros by adding parentheses around the bitfield widths that begin with a minus sign. Link: http://lkml.kernel.org/r/20170525120316.24473-6-abbotti@mev.co.uk Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Acked-by: Michal Nazarewicz <mina86@mina86.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Jakub Kicinski <jakub.kicinski@netronome.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
#ifndef _LINUX_BUG_H
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#define _LINUX_BUG_H
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#include <asm/bug.h>
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#include <linux/compiler.h>
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#include <linux/build_bug.h>
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enum bug_trap_type {
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BUG_TRAP_TYPE_NONE = 0,
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BUG_TRAP_TYPE_WARN = 1,
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BUG_TRAP_TYPE_BUG = 2,
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};
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struct pt_regs;
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#ifdef __CHECKER__
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#define MAYBE_BUILD_BUG_ON(cond) (0)
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#else /* __CHECKER__ */
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#define MAYBE_BUILD_BUG_ON(cond) \
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do { \
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if (__builtin_constant_p((cond))) \
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BUILD_BUG_ON(cond); \
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else \
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BUG_ON(cond); \
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} while (0)
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#endif /* __CHECKER__ */
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#ifdef CONFIG_GENERIC_BUG
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#include <asm-generic/bug.h>
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static inline int is_warning_bug(const struct bug_entry *bug)
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{
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return bug->flags & BUGFLAG_WARNING;
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}
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struct bug_entry *find_bug(unsigned long bugaddr);
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enum bug_trap_type report_bug(unsigned long bug_addr, struct pt_regs *regs);
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/* These are defined by the architecture */
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int is_valid_bugaddr(unsigned long addr);
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#else /* !CONFIG_GENERIC_BUG */
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static inline enum bug_trap_type report_bug(unsigned long bug_addr,
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struct pt_regs *regs)
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{
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return BUG_TRAP_TYPE_BUG;
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}
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#endif /* CONFIG_GENERIC_BUG */
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/*
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* Since detected data corruption should stop operation on the affected
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* structures. Return value must be checked and sanely acted on by caller.
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*/
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static inline __must_check bool check_data_corruption(bool v) { return v; }
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#define CHECK_DATA_CORRUPTION(condition, fmt, ...) \
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check_data_corruption(({ \
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bool corruption = unlikely(condition); \
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if (corruption) { \
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if (IS_ENABLED(CONFIG_BUG_ON_DATA_CORRUPTION)) { \
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pr_err(fmt, ##__VA_ARGS__); \
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BUG(); \
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} else \
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WARN(1, fmt, ##__VA_ARGS__); \
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} \
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corruption; \
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}))
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#endif /* _LINUX_BUG_H */
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