diff options
Diffstat (limited to 'include/linux/kdb.h')
| -rw-r--r-- | include/linux/kdb.h | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/include/linux/kdb.h b/include/linux/kdb.h index 07dfb6a20a1c..741c58e86431 100644 --- a/include/linux/kdb.h +++ b/include/linux/kdb.h @@ -14,6 +14,7 @@ */ #include <linux/list.h> +#include <linux/smp.h> /* Shifted versions of the command enable bits are be used if the command * has no arguments (see kdb_check_flags). This allows commands, such as @@ -104,7 +105,7 @@ extern int kdb_initial_cpu; #define KDB_NOENVVALUE (-6) #define KDB_NOTIMP (-7) #define KDB_ENVFULL (-8) -#define KDB_ENVBUFFULL (-9) +#define KDB_KMALLOCFAILED (-9) #define KDB_TOOMANYBPT (-10) #define KDB_TOOMANYDBREGS (-11) #define KDB_DUPBPT (-12) @@ -140,9 +141,6 @@ extern const char *kdb_diemsg; extern unsigned int kdb_flags; /* Global flags, see kdb_state for per cpu state */ -extern void kdb_save_flags(void); -extern void kdb_restore_flags(void); - #define KDB_FLAG(flag) (kdb_flags & KDB_FLAG_##flag) #define KDB_FLAG_SET(flag) ((void)(kdb_flags |= KDB_FLAG_##flag)) #define KDB_FLAG_CLEAR(flag) ((void)(kdb_flags &= ~KDB_FLAG_##flag)) @@ -196,6 +194,8 @@ int kdb_process_cpu(const struct task_struct *p) return cpu; } +extern void kdb_send_sig(struct task_struct *p, int sig); + #ifdef CONFIG_KALLSYMS extern const char *kdb_walk_kallsyms(loff_t *pos); #else /* ! CONFIG_KALLSYMS */ @@ -208,11 +208,26 @@ static inline const char *kdb_walk_kallsyms(loff_t *pos) /* Dynamic kdb shell command registration */ extern int kdb_register(kdbtab_t *cmd); extern void kdb_unregister(kdbtab_t *cmd); + +/* Return true when KDB as locked for printing a message on this CPU. */ +static inline +bool kdb_printf_on_this_cpu(void) +{ + /* + * We can use raw_smp_processor_id() here because the task could + * not get migrated when KDB has locked for printing on this CPU. + */ + return unlikely(READ_ONCE(kdb_printf_cpu) == raw_smp_processor_id()); +} + #else /* ! CONFIG_KGDB_KDB */ static inline __printf(1, 2) int kdb_printf(const char *fmt, ...) { return 0; } static inline void kdb_init(int level) {} static inline int kdb_register(kdbtab_t *cmd) { return 0; } static inline void kdb_unregister(kdbtab_t *cmd) {} + +static inline bool kdb_printf_on_this_cpu(void) { return false; } + #endif /* CONFIG_KGDB_KDB */ enum { KDB_NOT_INITIALIZED, |