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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2011-07-06 14:20:14 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-12-06 20:41:03 +0100 |
| commit | ac99b862fb98a36929831791da31714f709c2aa8 (patch) | |
| tree | 93edba15ae7bb289b9a820af6e75d24e43ebea9a | |
| parent | 9cdbe1cbac4ec318037297175587a0080acc9d11 (diff) | |
| download | linux-ac99b862fb98a36929831791da31714f709c2aa8.tar.bz2 | |
jump_label: Provide jump_label_key initializers
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>
| -rw-r--r-- | include/linux/jump_label.h | 3 | ||||
| -rw-r--r-- | kernel/jump_label.c | 12 |
2 files changed, 11 insertions, 4 deletions
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h index a1e7f909c801..5ce8b140428f 100644 --- a/include/linux/jump_label.h +++ b/include/linux/jump_label.h @@ -128,4 +128,7 @@ static inline void jump_label_rate_limit(struct jump_label_key_deferred *key, } #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 */ diff --git a/kernel/jump_label.c b/kernel/jump_label.c index 3fb7b79c86fd..30c3c7708132 100644 --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -248,8 +248,13 @@ void jump_label_apply_nops(struct module *mod) if (iter_start == iter_stop) return; - for (iter = iter_start; iter < iter_stop; iter++) - arch_jump_label_transform_static(iter, JUMP_LABEL_DISABLE); + for (iter = iter_start; iter < iter_stop; iter++) { + struct jump_label_key *iterk; + + iterk = (struct jump_label_key *)(unsigned long)iter->key; + arch_jump_label_transform_static(iter, jump_label_enabled(iterk) ? + JUMP_LABEL_ENABLE : JUMP_LABEL_DISABLE); + } } static int jump_label_add_module(struct module *mod) @@ -289,8 +294,7 @@ static int jump_label_add_module(struct module *mod) key->next = jlm; if (jump_label_enabled(key)) - __jump_label_update(key, iter, iter_stop, - JUMP_LABEL_ENABLE); + __jump_label_update(key, iter, iter_stop, JUMP_LABEL_ENABLE); } return 0; |