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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-10-03 22:01:46 +0400 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-10-25 22:54:31 +0400 |
| commit | 20284aa77c0f6227da4783a920b72dc61d4bcc09 (patch) | |
| tree | 46fb708a9508e3d718be7eb432367547e71208d3 /include/linux/jump_label.h | |
| parent | 92e02396d7214fdc7c25239eb647eb48e6fe6ba9 (diff) | |
| download | linux-20284aa77c0f6227da4783a920b72dc61d4bcc09.tar.xz | |
jump_label: add arch_jump_label_transform_static() to optimise non-live code updates
When updating a newly loaded module, the code is definitely not yet
executing on any processor, so it can be updated with no need for any
heavyweight synchronization.
This patch adds arch_jump_label_static() which is implemented as
arch_jump_label_transform() by default, but architectures can override
it if it avoids, say, a call to stop_machine().
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Jason Baron <jbaron@redhat.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Diffstat (limited to 'include/linux/jump_label.h')
| -rw-r--r-- | include/linux/jump_label.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h index 12e804ea32ab..56594e45b011 100644 --- a/include/linux/jump_label.h +++ b/include/linux/jump_label.h @@ -45,6 +45,8 @@ 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); |