mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-26 23:10:50 +07:00
ac99b862fb
Provide two initializers for jump_label_key that initialize it enabled or disabled. Also modify all jump_label code to allow for jump_labels to be initialized enabled. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Jason Baron <jbaron@redhat.com> Link: http://lkml.kernel.org/n/tip-p40e3yj21b68y03z1yv825e7@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
#ifndef _LINUX_JUMP_LABEL_H
|
|
#define _LINUX_JUMP_LABEL_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/compiler.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
|
|
|
|
struct jump_label_key {
|
|
atomic_t enabled;
|
|
struct jump_entry *entries;
|
|
#ifdef CONFIG_MODULES
|
|
struct jump_label_mod *next;
|
|
#endif
|
|
};
|
|
|
|
struct jump_label_key_deferred {
|
|
struct jump_label_key key;
|
|
unsigned long timeout;
|
|
struct delayed_work work;
|
|
};
|
|
|
|
# include <asm/jump_label.h>
|
|
# define HAVE_JUMP_LABEL
|
|
#endif /* CC_HAVE_ASM_GOTO && CONFIG_JUMP_LABEL */
|
|
|
|
enum jump_label_type {
|
|
JUMP_LABEL_DISABLE = 0,
|
|
JUMP_LABEL_ENABLE,
|
|
};
|
|
|
|
struct module;
|
|
|
|
#ifdef HAVE_JUMP_LABEL
|
|
|
|
#ifdef CONFIG_MODULES
|
|
#define JUMP_LABEL_INIT {ATOMIC_INIT(0), NULL, NULL}
|
|
#else
|
|
#define JUMP_LABEL_INIT {ATOMIC_INIT(0), NULL}
|
|
#endif
|
|
|
|
static __always_inline bool static_branch(struct jump_label_key *key)
|
|
{
|
|
return arch_static_branch(key);
|
|
}
|
|
|
|
extern struct jump_entry __start___jump_table[];
|
|
extern struct jump_entry __stop___jump_table[];
|
|
|
|
extern void jump_label_init(void);
|
|
extern void jump_label_lock(void);
|
|
extern void jump_label_unlock(void);
|
|
extern void arch_jump_label_transform(struct jump_entry *entry,
|
|
enum jump_label_type type);
|
|
extern void arch_jump_label_transform_static(struct jump_entry *entry,
|
|
enum jump_label_type type);
|
|
extern int jump_label_text_reserved(void *start, void *end);
|
|
extern void jump_label_inc(struct jump_label_key *key);
|
|
extern void jump_label_dec(struct jump_label_key *key);
|
|
extern void jump_label_dec_deferred(struct jump_label_key_deferred *key);
|
|
extern bool jump_label_enabled(struct jump_label_key *key);
|
|
extern void jump_label_apply_nops(struct module *mod);
|
|
extern void jump_label_rate_limit(struct jump_label_key_deferred *key,
|
|
unsigned long rl);
|
|
|
|
#else /* !HAVE_JUMP_LABEL */
|
|
|
|
#include <linux/atomic.h>
|
|
|
|
#define JUMP_LABEL_INIT {ATOMIC_INIT(0)}
|
|
|
|
struct jump_label_key {
|
|
atomic_t enabled;
|
|
};
|
|
|
|
static __always_inline void jump_label_init(void)
|
|
{
|
|
}
|
|
|
|
struct jump_label_key_deferred {
|
|
struct jump_label_key key;
|
|
};
|
|
|
|
static __always_inline bool static_branch(struct jump_label_key *key)
|
|
{
|
|
if (unlikely(atomic_read(&key->enabled)))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static inline void jump_label_inc(struct jump_label_key *key)
|
|
{
|
|
atomic_inc(&key->enabled);
|
|
}
|
|
|
|
static inline void jump_label_dec(struct jump_label_key *key)
|
|
{
|
|
atomic_dec(&key->enabled);
|
|
}
|
|
|
|
static inline void jump_label_dec_deferred(struct jump_label_key_deferred *key)
|
|
{
|
|
jump_label_dec(&key->key);
|
|
}
|
|
|
|
static inline int jump_label_text_reserved(void *start, void *end)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void jump_label_lock(void) {}
|
|
static inline void jump_label_unlock(void) {}
|
|
|
|
static inline bool jump_label_enabled(struct jump_label_key *key)
|
|
{
|
|
return !!atomic_read(&key->enabled);
|
|
}
|
|
|
|
static inline int jump_label_apply_nops(struct module *mod)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void jump_label_rate_limit(struct jump_label_key_deferred *key,
|
|
unsigned long rl)
|
|
{
|
|
}
|
|
#endif /* HAVE_JUMP_LABEL */
|
|
|
|
#define jump_label_key_enabled ((struct jump_label_key){ .enabled = ATOMIC_INIT(1), })
|
|
#define jump_label_key_disabled ((struct jump_label_key){ .enabled = ATOMIC_INIT(0), })
|
|
|
|
#endif /* _LINUX_JUMP_LABEL_H */
|