| commit | 20284aa77c0f6227da4783a920b72dc61d4bcc09 | |
| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | |
| Mon, 3 Oct 2011 18:01:46 +0000 (3 11:01 -0700) | ||
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | |
| Tue, 25 Oct 2011 18:54:31 +0000 (25 11:54 -0700) | ||
| tree | 46fb708a9508e3d718be7eb432367547e71208d3 | treesnapshot (tar.gz zip) |
| parent | 92e02396d7214fdc7c25239eb647eb48e6fe6ba9 | commitdiff |
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>
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>
| include/linux/jump_label.h | diffblobblamehistory | |
| kernel/jump_label.c | diffblobblamehistory |