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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-09-30 09:10:54 -0700 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-10-25 11:54:04 -0700 |
| commit | 189c3fd68c7016e37c1ffd7a00009e2c944a9d06 (patch) | |
| tree | f4df4e497ba41eefd3c5a74761de90567e8a8727 /kernel/jump_label.c | |
| parent | d5d9a3b12adf339b851c8e595d2ca71c3d211363 (diff) | |
| download | lwn-189c3fd68c7016e37c1ffd7a00009e2c944a9d06.tar.gz lwn-189c3fd68c7016e37c1ffd7a00009e2c944a9d06.zip | |
stop_machine: make stop_machine safe and efficient to call early
Make stop_machine() safe to call early in boot, before stop_machine()
has been set up, by simply calling the callback function directly if
there's only one CPU online.
[ Fixes from AKPM:
- add comment
- local_irq_flags, not save_flags
- also call hard_irq_disable() for systems which need it
Tejun suggested using an explicit flag rather than just looking at
the online cpu count. ]
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/jump_label.c')
0 files changed, 0 insertions, 0 deletions