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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-11-01 01:11:15 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-01 01:30:53 +0100 |
| commit | f445027e4e692bd885118460b292d08027fd5501 (patch) | |
| tree | e7791443970d45ffede0f23018676d508a1f1149 /kernel/watchdog.c | |
| parent | drivers/misc/ad525x_dpot-i2c.c: add i2c support for AD5161 (diff) | |
| download | linux-f445027e4e692bd885118460b292d08027fd5501.tar.xz linux-f445027e4e692bd885118460b292d08027fd5501.zip | |
stop_machine: make stop_machine safe and efficient to call early
Make stop_machine() safe to call early in boot, before SMP 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. ]
Cc: Tejun Heo <tj@kernel.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Tejun Heo <htejun@gmail.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/watchdog.c')
0 files changed, 0 insertions, 0 deletions