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author | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-08-27 21:59:59 -0500 |
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committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-08-27 21:59:59 -0500 |
commit | 8ce7a9c159c8c4eb480f0a65c6af753dbf9a1a70 (patch) | |
tree | be59573c0af3617d0cd8a7d61f0ed119e58b1156 /Documentation/cpu-hotplug.txt | |
parent | d2afb3ae04e36dbc6e9eb2d8bd54406ff7b6b3bd (diff) | |
parent | 01da5fd83d6b2c5e36b77539f6cbdd8f49849225 (diff) |
Merge ../linux-2.6
Diffstat (limited to 'Documentation/cpu-hotplug.txt')
-rw-r--r-- | Documentation/cpu-hotplug.txt | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/Documentation/cpu-hotplug.txt b/Documentation/cpu-hotplug.txt index 1bcf69996c9..bc107cb157a 100644 --- a/Documentation/cpu-hotplug.txt +++ b/Documentation/cpu-hotplug.txt @@ -251,16 +251,24 @@ A: This is what you would need in your kernel code to receive notifications. return NOTIFY_OK; } - static struct notifier_block foobar_cpu_notifer = + static struct notifier_block __cpuinitdata foobar_cpu_notifer = { .notifier_call = foobar_cpu_callback, }; +You need to call register_cpu_notifier() from your init function. +Init functions could be of two types: +1. early init (init function called when only the boot processor is online). +2. late init (init function called _after_ all the CPUs are online). -In your init function, +For the first case, you should add the following to your init function register_cpu_notifier(&foobar_cpu_notifier); +For the second case, you should add the following to your init function + + register_hotcpu_notifier(&foobar_cpu_notifier); + You can fail PREPARE notifiers if something doesn't work to prepare resources. This will stop the activity and send a following CANCELED event back. |