diff options
Diffstat (limited to 'include/linux/kernel.h')
| -rw-r--r-- | include/linux/kernel.h | 317 |
1 files changed, 43 insertions, 274 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 15d8bad3d2f2..fe6efb24d151 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -1,22 +1,35 @@ /* SPDX-License-Identifier: GPL-2.0 */ +/* + * NOTE: + * + * This header has combined a lot of unrelated to each other stuff. + * The process of splitting its content is in progress while keeping + * backward compatibility. That's why it's highly recommended NOT to + * include this header inside another header file, especially under + * generic or architectural include/ directory. + */ #ifndef _LINUX_KERNEL_H #define _LINUX_KERNEL_H -#include <stdarg.h> +#include <linux/stdarg.h> #include <linux/align.h> #include <linux/limits.h> #include <linux/linkage.h> #include <linux/stddef.h> #include <linux/types.h> #include <linux/compiler.h> +#include <linux/container_of.h> #include <linux/bitops.h> +#include <linux/kstrtox.h> #include <linux/log2.h> #include <linux/math.h> #include <linux/minmax.h> #include <linux/typecheck.h> +#include <linux/panic.h> #include <linux/printk.h> #include <linux/build_bug.h> #include <linux/static_call_types.h> +#include <linux/instruction_pointer.h> #include <asm/byteorder.h> #include <uapi/linux/kernel.h> @@ -50,11 +63,6 @@ } \ ) -#define typeof_member(T, m) typeof(((T*)0)->m) - -#define _RET_IP_ (unsigned long)__builtin_return_address(0) -#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; }) - /** * upper_32_bits - return bits 32-63 of a number * @n: the number we're accessing @@ -71,16 +79,27 @@ */ #define lower_32_bits(n) ((u32)((n) & 0xffffffff)) +/** + * upper_16_bits - return bits 16-31 of a number + * @n: the number we're accessing + */ +#define upper_16_bits(n) ((u16)((n) >> 16)) + +/** + * lower_16_bits - return bits 0-15 of a number + * @n: the number we're accessing + */ +#define lower_16_bits(n) ((u16)((n) & 0xffff)) + struct completion; -struct pt_regs; struct user; -#ifdef CONFIG_PREEMPT_VOLUNTARY +#ifdef CONFIG_PREEMPT_VOLUNTARY_BUILD extern int __cond_resched(void); # define might_resched() __cond_resched() -#elif defined(CONFIG_PREEMPT_DYNAMIC) +#elif defined(CONFIG_PREEMPT_DYNAMIC) && defined(CONFIG_HAVE_PREEMPT_DYNAMIC_CALL) extern int __cond_resched(void); @@ -91,6 +110,11 @@ static __always_inline void might_resched(void) static_call_mod(might_resched)(); } +#elif defined(CONFIG_PREEMPT_DYNAMIC) && defined(CONFIG_HAVE_PREEMPT_DYNAMIC_KEY) + +extern int dynamic_might_resched(void); +# define might_resched() dynamic_might_resched() + #else # define might_resched() do { } while (0) @@ -98,8 +122,8 @@ static __always_inline void might_resched(void) #endif /* CONFIG_PREEMPT_* */ #ifdef CONFIG_DEBUG_ATOMIC_SLEEP -extern void ___might_sleep(const char *file, int line, int preempt_offset); -extern void __might_sleep(const char *file, int line, int preempt_offset); +extern void __might_resched(const char *file, int line, unsigned int offsets); +extern void __might_sleep(const char *file, int line); extern void __cant_sleep(const char *file, int line, int preempt_offset); extern void __cant_migrate(const char *file, int line); @@ -116,7 +140,7 @@ extern void __cant_migrate(const char *file, int line); * supposed to. */ # define might_sleep() \ - do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0) + do { __might_sleep(__FILE__, __LINE__); might_resched(); } while (0) /** * cant_sleep - annotation for functions that cannot sleep * @@ -155,10 +179,9 @@ extern void __cant_migrate(const char *file, int line); */ # define non_block_end() WARN_ON(current->non_block_count-- == 0) #else - static inline void ___might_sleep(const char *file, int line, - int preempt_offset) { } - static inline void __might_sleep(const char *file, int line, - int preempt_offset) { } + static inline void __might_resched(const char *file, int line, + unsigned int offsets) { } +static inline void __might_sleep(const char *file, int line) { } # define might_sleep() do { might_resched(); } while (0) # define cant_sleep() do { } while (0) # define cant_migrate() do { } while (0) @@ -177,158 +200,7 @@ void __might_fault(const char *file, int line); static inline void might_fault(void) { } #endif -extern struct atomic_notifier_head panic_notifier_list; -extern long (*panic_blink)(int state); -__printf(1, 2) -void panic(const char *fmt, ...) __noreturn __cold; -void nmi_panic(struct pt_regs *regs, const char *msg); -extern void oops_enter(void); -extern void oops_exit(void); -extern bool oops_may_print(void); void do_exit(long error_code) __noreturn; -void complete_and_exit(struct completion *, long) __noreturn; - -/* Internal, do not use. */ -int __must_check _kstrtoul(const char *s, unsigned int base, unsigned long *res); -int __must_check _kstrtol(const char *s, unsigned int base, long *res); - -int __must_check kstrtoull(const char *s, unsigned int base, unsigned long long *res); -int __must_check kstrtoll(const char *s, unsigned int base, long long *res); - -/** - * kstrtoul - convert a string to an unsigned long - * @s: The start of the string. The string must be null-terminated, and may also - * include a single newline before its terminating null. The first character - * may also be a plus sign, but not a minus sign. - * @base: The number base to use. The maximum supported base is 16. If base is - * given as 0, then the base of the string is automatically detected with the - * conventional semantics - If it begins with 0x the number will be parsed as a - * hexadecimal (case insensitive), if it otherwise begins with 0, it will be - * parsed as an octal number. Otherwise it will be parsed as a decimal. - * @res: Where to write the result of the conversion on success. - * - * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error. - * Preferred over simple_strtoul(). Return code must be checked. -*/ -static inline int __must_check kstrtoul(const char *s, unsigned int base, unsigned long *res) -{ - /* - * We want to shortcut function call, but - * __builtin_types_compatible_p(unsigned long, unsigned long long) = 0. - */ - if (sizeof(unsigned long) == sizeof(unsigned long long) && - __alignof__(unsigned long) == __alignof__(unsigned long long)) - return kstrtoull(s, base, (unsigned long long *)res); - else - return _kstrtoul(s, base, res); -} - -/** - * kstrtol - convert a string to a long - * @s: The start of the string. The string must be null-terminated, and may also - * include a single newline before its terminating null. The first character - * may also be a plus sign or a minus sign. - * @base: The number base to use. The maximum supported base is 16. If base is - * given as 0, then the base of the string is automatically detected with the - * conventional semantics - If it begins with 0x the number will be parsed as a - * hexadecimal (case insensitive), if it otherwise begins with 0, it will be - * parsed as an octal number. Otherwise it will be parsed as a decimal. - * @res: Where to write the result of the conversion on success. - * - * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error. - * Preferred over simple_strtol(). Return code must be checked. - */ -static inline int __must_check kstrtol(const char *s, unsigned int base, long *res) -{ - /* - * We want to shortcut function call, but - * __builtin_types_compatible_p(long, long long) = 0. - */ - if (sizeof(long) == sizeof(long long) && - __alignof__(long) == __alignof__(long long)) - return kstrtoll(s, base, (long long *)res); - else - return _kstrtol(s, base, res); -} - -int __must_check kstrtouint(const char *s, unsigned int base, unsigned int *res); -int __must_check kstrtoint(const char *s, unsigned int base, int *res); - -static inline int __must_check kstrtou64(const char *s, unsigned int base, u64 *res) -{ - return kstrtoull(s, base, res); -} - -static inline int __must_check kstrtos64(const char *s, unsigned int base, s64 *res) -{ - return kstrtoll(s, base, res); -} - -static inline int __must_check kstrtou32(const char *s, unsigned int base, u32 *res) -{ - return kstrtouint(s, base, res); -} - -static inline int __must_check kstrtos32(const char *s, unsigned int base, s32 *res) -{ - return kstrtoint(s, base, res); -} - -int __must_check kstrtou16(const char *s, unsigned int base, u16 *res); -int __must_check kstrtos16(const char *s, unsigned int base, s16 *res); -int __must_check kstrtou8(const char *s, unsigned int base, u8 *res); -int __must_check kstrtos8(const char *s, unsigned int base, s8 *res); -int __must_check kstrtobool(const char *s, bool *res); - -int __must_check kstrtoull_from_user(const char __user *s, size_t count, unsigned int base, unsigned long long *res); -int __must_check kstrtoll_from_user(const char __user *s, size_t count, unsigned int base, long long *res); -int __must_check kstrtoul_from_user(const char __user *s, size_t count, unsigned int base, unsigned long *res); -int __must_check kstrtol_from_user(const char __user *s, size_t count, unsigned int base, long *res); -int __must_check kstrtouint_from_user(const char __user *s, size_t count, unsigned int base, unsigned int *res); -int __must_check kstrtoint_from_user(const char __user *s, size_t count, unsigned int base, int *res); -int __must_check kstrtou16_from_user(const char __user *s, size_t count, unsigned int base, u16 *res); -int __must_check kstrtos16_from_user(const char __user *s, size_t count, unsigned int base, s16 *res); -int __must_check kstrtou8_from_user(const char __user *s, size_t count, unsigned int base, u8 *res); -int __must_check kstrtos8_from_user(const char __user *s, size_t count, unsigned int base, s8 *res); -int __must_check kstrtobool_from_user(const char __user *s, size_t count, bool *res); - -static inline int __must_check kstrtou64_from_user(const char __user *s, size_t count, unsigned int base, u64 *res) -{ - return kstrtoull_from_user(s, count, base, res); -} - -static inline int __must_check kstrtos64_from_user(const char __user *s, size_t count, unsigned int base, s64 *res) -{ - return kstrtoll_from_user(s, count, base, res); -} - -static inline int __must_check kstrtou32_from_user(const char __user *s, size_t count, unsigned int base, u32 *res) -{ - return kstrtouint_from_user(s, count, base, res); -} - -static inline int __must_check kstrtos32_from_user(const char __user *s, size_t count, unsigned int base, s32 *res) -{ - return kstrtoint_from_user(s, count, base, res); -} - -/* - * Use kstrto<foo> instead. - * - * NOTE: simple_strto<foo> does not check for the range overflow and, - * depending on the input, may give interesting results. - * - * Use these functions if and only if you cannot use kstrto<foo>, because - * the conversion ends on the first non-digit character, which may be far - * beyond the supported range. It might be useful to parse the strings like - * 10x50 or 12:21 without altering original string or temporary buffer in use. - * Keep in mind above caveat. - */ - -extern unsigned long simple_strtoul(const char *,char **,unsigned int); -extern long simple_strtol(const char *,char **,unsigned int); -extern unsigned long long simple_strtoull(const char *,char **,unsigned int); -extern long long simple_strtoll(const char *,char **,unsigned int); extern int num_to_str(char *buf, int size, unsigned long long num, unsigned int width); @@ -357,6 +229,8 @@ int sscanf(const char *, const char *, ...); extern __scanf(2, 0) int vsscanf(const char *, const char *, va_list); +extern int no_hash_pointers_enable(char *str); + extern int get_option(char **str, int *pint); extern char *get_options(const char *str, int nints, int *ints); extern unsigned long long memparse(const char *ptr, char **retptr); @@ -364,58 +238,12 @@ extern bool parse_option_str(const char *str, const char *option); extern char *next_arg(char *args, char **param, char **val); extern int core_kernel_text(unsigned long addr); -extern int init_kernel_text(unsigned long addr); -extern int core_kernel_data(unsigned long addr); extern int __kernel_text_address(unsigned long addr); extern int kernel_text_address(unsigned long addr); extern int func_ptr_is_kernel_text(void *ptr); -#ifdef CONFIG_SMP -extern unsigned int sysctl_oops_all_cpu_backtrace; -#else -#define sysctl_oops_all_cpu_backtrace 0 -#endif /* CONFIG_SMP */ - extern void bust_spinlocks(int yes); -extern int panic_timeout; -extern unsigned long panic_print; -extern int panic_on_oops; -extern int panic_on_unrecovered_nmi; -extern int panic_on_io_nmi; -extern int panic_on_warn; -extern unsigned long panic_on_taint; -extern bool panic_on_taint_nousertaint; -extern int sysctl_panic_on_rcu_stall; -extern int sysctl_max_rcu_stall_to_panic; -extern int sysctl_panic_on_stackoverflow; -extern bool crash_kexec_post_notifiers; - -/* - * panic_cpu is used for synchronizing panic() and crash_kexec() execution. It - * holds a CPU number which is executing panic() currently. A value of - * PANIC_CPU_INVALID means no CPU has entered panic() or crash_kexec(). - */ -extern atomic_t panic_cpu; -#define PANIC_CPU_INVALID -1 - -/* - * Only to be used by arch init code. If the user over-wrote the default - * CONFIG_PANIC_TIMEOUT, honor it. - */ -static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout) -{ - if (panic_timeout == arch_default_timeout) - panic_timeout = timeout; -} -extern const char *print_tainted(void); -enum lockdep_ok { - LOCKDEP_STILL_OK, - LOCKDEP_NOW_UNRELIABLE -}; -extern void add_taint(unsigned flag, enum lockdep_ok); -extern int test_taint(unsigned flag); -extern unsigned long get_taint(void); extern int root_mountflags; extern bool early_boot_irqs_disabled; @@ -427,6 +255,7 @@ extern bool early_boot_irqs_disabled; extern enum system_states { SYSTEM_BOOTING, SYSTEM_SCHEDULING, + SYSTEM_FREEING_INITMEM, SYSTEM_RUNNING, SYSTEM_HALT, SYSTEM_POWER_OFF, @@ -434,36 +263,6 @@ extern enum system_states { SYSTEM_SUSPEND, } system_state; -/* This cannot be an enum because some may be used in assembly source. */ -#define TAINT_PROPRIETARY_MODULE 0 -#define TAINT_FORCED_MODULE 1 -#define TAINT_CPU_OUT_OF_SPEC 2 -#define TAINT_FORCED_RMMOD 3 -#define TAINT_MACHINE_CHECK 4 -#define TAINT_BAD_PAGE 5 -#define TAINT_USER 6 -#define TAINT_DIE 7 -#define TAINT_OVERRIDDEN_ACPI_TABLE 8 -#define TAINT_WARN 9 -#define TAINT_CRAP 10 -#define TAINT_FIRMWARE_WORKAROUND 11 -#define TAINT_OOT_MODULE 12 -#define TAINT_UNSIGNED_MODULE 13 -#define TAINT_SOFTLOCKUP 14 -#define TAINT_LIVEPATCH 15 -#define TAINT_AUX 16 -#define TAINT_RANDSTRUCT 17 -#define TAINT_FLAGS_COUNT 18 -#define TAINT_FLAGS_MAX ((1UL << TAINT_FLAGS_COUNT) - 1) - -struct taint_flag { - char c_true; /* character printed when tainted */ - char c_false; /* character printed when not tainted */ - bool module; /* also show as a per-module taint flag */ -}; - -extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT]; - extern const char hex_asc[]; #define hex_asc_lo(x) hex_asc[((x) & 0x0f)] #define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] @@ -486,7 +285,7 @@ static inline char *hex_byte_pack_upper(char *buf, u8 byte) return buf; } -extern int hex_to_bin(char ch); +extern int hex_to_bin(unsigned char ch); extern int __must_check hex2bin(u8 *dst, const char *src, size_t count); extern char *bin2hex(char *dst, const void *src, size_t count); @@ -692,36 +491,6 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { } #define __CONCAT(a, b) a ## b #define CONCATENATE(a, b) __CONCAT(a, b) -/** - * container_of - cast a member of a structure out to the containing structure - * @ptr: the pointer to the member. - * @type: the type of the container struct this is embedded in. - * @member: the name of the member within the struct. - * - */ -#define container_of(ptr, type, member) ({ \ - void *__mptr = (void *)(ptr); \ - BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ - !__same_type(*(ptr), void), \ - "pointer type mismatch in container_of()"); \ - ((type *)(__mptr - offsetof(type, member))); }) - -/** - * container_of_safe - cast a member of a structure out to the containing structure - * @ptr: the pointer to the member. - * @type: the type of the container struct this is embedded in. - * @member: the name of the member within the struct. - * - * If IS_ERR_OR_NULL(ptr), ptr is returned unchanged. - */ -#define container_of_safe(ptr, type, member) ({ \ - void *__mptr = (void *)(ptr); \ - BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ - !__same_type(*(ptr), void), \ - "pointer type mismatch in container_of()"); \ - IS_ERR_OR_NULL(__mptr) ? ERR_CAST(__mptr) : \ - ((type *)(__mptr - offsetof(type, member))); }) - /* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */ #ifdef CONFIG_FTRACE_MCOUNT_RECORD # define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD |