tree 239da4074ced93ee6918fdb03e3839ef721191bb
parent 37b07e4163f7306aa735a6e250e8d22293e5b8de
author Yasunori Goto <y-goto@jp.fujitsu.com> 1192523140 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1192552979 -0700

Fix panic of cpu online with memory less node

When a cpu is onlined on memory-less-node box, kernel panics due to touch
NULL pointer of pgdat->kswapd.  Current kswapd runs only nodes which have
memory.  So, calling of set_cpus_allowed() is not necessary for memory-less
node.

This is fix for it.

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>