diff options
| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-10-12 16:17:54 -0700 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-10-25 11:55:15 -0700 |
| commit | 97ce2c88f9ad42e3c60a9beb9fca87abf3639faa (patch) | |
| tree | c25d41a8754b6e11dbf54ba69ebbee11fdffd07e | |
| parent | e71a5be15e47a73a2964712967fe93ee8ccf551b (diff) | |
| download | xen-upstream/jump-label-noearly.tar.gz | |
jump-label: initialize jump-label subsystem much earlierupstream/jump-label-noearly
Initialize jump_labels much, much earlier, so they're available for use
during system setup.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
| -rw-r--r-- | include/linux/jump_label.h | 14 | ||||
| -rw-r--r-- | init/main.c | 3 | ||||
| -rw-r--r-- | kernel/jump_label.c | 5 |
3 files changed, 13 insertions, 9 deletions
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h index 56594e45b0117..388b0d425b507 100644 --- a/include/linux/jump_label.h +++ b/include/linux/jump_label.h @@ -16,7 +16,7 @@ struct jump_label_key { # include <asm/jump_label.h> # define HAVE_JUMP_LABEL -#endif +#endif /* CC_HAVE_ASM_GOTO && CONFIG_JUMP_LABEL */ enum jump_label_type { JUMP_LABEL_DISABLE = 0, @@ -41,6 +41,7 @@ static __always_inline bool static_branch(struct jump_label_key *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, @@ -53,7 +54,7 @@ extern void jump_label_dec(struct jump_label_key *key); extern bool jump_label_enabled(struct jump_label_key *key); extern void jump_label_apply_nops(struct module *mod); -#else +#else /* !HAVE_JUMP_LABEL */ #include <linux/atomic.h> @@ -63,6 +64,10 @@ struct jump_label_key { atomic_t enabled; }; +static __always_inline void jump_label_init(void) +{ +} + static __always_inline bool static_branch(struct jump_label_key *key) { if (unlikely(atomic_read(&key->enabled))) @@ -97,7 +102,6 @@ static inline int jump_label_apply_nops(struct module *mod) { return 0; } +#endif /* HAVE_JUMP_LABEL */ -#endif - -#endif +#endif /* _LINUX_JUMP_LABEL_H */ diff --git a/init/main.c b/init/main.c index 2a9b88aa5e760..29d8d847de949 100644 --- a/init/main.c +++ b/init/main.c @@ -515,6 +515,9 @@ asmlinkage void __init start_kernel(void) parse_args("Booting kernel", static_command_line, __start___param, __stop___param - __start___param, &unknown_bootoption); + + jump_label_init(); + /* * These use large bootmem allocations and must precede * kmem_cache_init() diff --git a/kernel/jump_label.c b/kernel/jump_label.c index ff2028f35aa8c..bbdfe2a462a08 100644 --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -133,7 +133,7 @@ static void __jump_label_update(struct jump_label_key *key, } } -static __init int jump_label_init(void) +void __init jump_label_init(void) { struct jump_entry *iter_start = __start___jump_table; struct jump_entry *iter_stop = __stop___jump_table; @@ -159,10 +159,7 @@ static __init int jump_label_init(void) #endif } jump_label_unlock(); - - return 0; } -early_initcall(jump_label_init); #ifdef CONFIG_MODULES |