Commit-ID: ac99b862fb98a36929831791da31714f709c2aa8
Gitweb: http://git.kernel.org/tip/ac99b862fb98a36929831791da31714f709c2aa8
Author: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
AuthorDate: Wed, 6 Jul 2011 14:20:14 +0200
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Tue, 6 Dec 2011 20:41:03 +0100
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@xxxxxxxxx>
Cc: Jason Baron <jbaron@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-p40e3yj21b68y03z1yv825e7@xxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
include/linux/jump_label.h | 3 +++
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 a1e7f90..5ce8b14 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 3fb7b79..30c3c77 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;
--
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