tree f32542ac1449313de8d8c6bc02cc64a7d9aed187
parent 929aaf56958ab2300919653b923413af695470a5
author Zhang Yanfei <zhangyanfei@cn.fujitsu.com> 1373324410 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1373391202 -0700

mm/sparse.c: put clear_hwpoisoned_pages within CONFIG_MEMORY_HOTREMOVE

With CONFIG_MEMORY_HOTREMOVE unset, there is a compile warning:

  mm/sparse.c:755: warning: `clear_hwpoisoned_pages' defined but not used

And Bisecting it ended up pointing to 4edd7ceff ("mm, hotplug: avoid
compiling memory hotremove functions when disabled").

This is because the commit above put sparse_remove_one_section() within
the protection of CONFIG_MEMORY_HOTREMOVE but the only user of
clear_hwpoisoned_pages() is sparse_remove_one_section(), and it is not
within the protection of CONFIG_MEMORY_HOTREMOVE.

So put clear_hwpoisoned_pages within CONFIG_MEMORY_HOTREMOVE should fix
the warning.

Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>