[GitHub/moto-9609/android_kernel_motorola_exynos9610.git] / include / linux / bug.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_BUG_H
#define _LINUX_BUG_H

#include <asm/bug.h>
#include <linux/compiler.h>
#include <linux/build_bug.h>

enum bug_trap_type {
	BUG_TRAP_TYPE_NONE = 0,
	BUG_TRAP_TYPE_WARN = 1,
	BUG_TRAP_TYPE_BUG = 2,
};

struct pt_regs;

#ifdef __CHECKER__
#define MAYBE_BUILD_BUG_ON(cond) (0)
#else /* __CHECKER__ */

#define MAYBE_BUILD_BUG_ON(cond)			\
	do {						\
		if (__builtin_constant_p((cond)))       \
			BUILD_BUG_ON(cond);             \
		else                                    \
			BUG_ON(cond);                   \
	} while (0)

#endif	/* __CHECKER__ */

#ifdef CONFIG_GENERIC_BUG
#include <asm-generic/bug.h>

static inline int is_warning_bug(const struct bug_entry *bug)
{
	return bug->flags & BUGFLAG_WARNING;
}

struct bug_entry *find_bug(unsigned long bugaddr);

enum bug_trap_type report_bug(unsigned long bug_addr, struct pt_regs *regs);

/* These are defined by the architecture */
int is_valid_bugaddr(unsigned long addr);

#else	/* !CONFIG_GENERIC_BUG */

static inline enum bug_trap_type report_bug(unsigned long bug_addr,
					    struct pt_regs *regs)
{
	return BUG_TRAP_TYPE_BUG;
}

#endif	/* CONFIG_GENERIC_BUG */

/*
 * Since detected data corruption should stop operation on the affected
 * structures. Return value must be checked and sanely acted on by caller.
 */
static inline __must_check bool check_data_corruption(bool v) { return v; }
#define CHECK_DATA_CORRUPTION(condition, fmt, ...)			 \
	check_data_corruption(({					 \
		bool corruption = unlikely(condition);			 \
		if (corruption) {					 \
			if (IS_ENABLED(CONFIG_BUG_ON_DATA_CORRUPTION)) { \
				pr_err(fmt, ##__VA_ARGS__);		 \
				BUG();					 \
			} else						 \
				WARN(1, fmt, ##__VA_ARGS__);		 \
		}							 \
		corruption;						 \
	}))

#endif	/* _LINUX_BUG_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
7664c5a1 JF	2	#ifndef _LINUX_BUG_H
	3	#define _LINUX_BUG_H
	4
7664c5a1	5	#include <asm/bug.h>
a3ccc497	6	#include <linux/compiler.h>
bc6245e5	7	#include <linux/build_bug.h>
7664c5a1 JF	8
	9	enum bug_trap_type {
	10	BUG_TRAP_TYPE_NONE = 0,
	11	BUG_TRAP_TYPE_WARN = 1,
	12	BUG_TRAP_TYPE_BUG = 2,
	13	};
	14
608e2619 HC	15	struct pt_regs;
608e2619 HC	16
35edd910	17	#ifdef __CHECKER__
ff20c2e0	18	#define MAYBE_BUILD_BUG_ON(cond) (0)
35edd910 PG	19	#else /* __CHECKER__ */
35edd910 PG	20
ff20c2e0 KS	21	#define MAYBE_BUILD_BUG_ON(cond) \
	22	do { \
	23	if (__builtin_constant_p((cond))) \
	24	BUILD_BUG_ON(cond); \
	25	else \
	26	BUG_ON(cond); \
	27	} while (0)
	28
35edd910 PG	29	#endif /* __CHECKER__ */
35edd910 PG	30
7664c5a1 JF	31	#ifdef CONFIG_GENERIC_BUG
	32	#include <asm-generic/bug.h>
	33
	34	static inline int is_warning_bug(const struct bug_entry *bug)
	35	{
	36	return bug->flags & BUGFLAG_WARNING;
	37	}
	38
19d43626	39	struct bug_entry *find_bug(unsigned long bugaddr);
7664c5a1	40
608e2619	41	enum bug_trap_type report_bug(unsigned long bug_addr, struct pt_regs *regs);
7664c5a1	42
7664c5a1 JF	43	/* These are defined by the architecture */
	44	int is_valid_bugaddr(unsigned long addr);
	45
	46	#else /* !CONFIG_GENERIC_BUG */
	47
608e2619 HC	48	static inline enum bug_trap_type report_bug(unsigned long bug_addr,
608e2619 HC	49	struct pt_regs *regs)
7664c5a1 JF	50	{
	51	return BUG_TRAP_TYPE_BUG;
	52	}
7664c5a1 JF	53
7664c5a1 JF	54	#endif /* CONFIG_GENERIC_BUG */
de54ebbe KC	55
	56	/*
	57	* Since detected data corruption should stop operation on the affected
85caa95b	58	* structures. Return value must be checked and sanely acted on by caller.
de54ebbe	59	*/
85caa95b	60	static inline __must_check bool check_data_corruption(bool v) { return v; }
de54ebbe	61	#define CHECK_DATA_CORRUPTION(condition, fmt, ...) \
85caa95b KC	62	check_data_corruption(({ \
	63	bool corruption = unlikely(condition); \
	64	if (corruption) { \
de54ebbe KC	65	if (IS_ENABLED(CONFIG_BUG_ON_DATA_CORRUPTION)) { \
	66	pr_err(fmt, ##__VA_ARGS__); \
	67	BUG(); \
	68	} else \
	69	WARN(1, fmt, ##__VA_ARGS__); \
de54ebbe	70	} \
85caa95b KC	71	corruption; \
85caa95b KC	72	}))
de54ebbe	73
7664c5a1	74	#endif /* _LINUX_BUG_H */