include/linux/idr.h: add #include <linux/bug.h>
The <linux/bug.h> was removed from radix-tree.h by commit f5bba9d1 ("include/linux/radix-tree.h: remove unneeded #include <linux/bug.h>"). Since that commit, tools/testing/radix-tree/ couldn't pass compilation due to tools/testing/radix-tree/idr.c:17: undefined reference to WARN_ON_ONCE. This patch adds the bug.h header to idr.h to solve the issue. Link: http://lkml.kernel.org/r/1511963726-34070-2-git-send-email-wei.w.wang@intel.com Fixes: f5bba9d1 ("include/linux/radix-tree.h: remove unneeded #include <linux/bug.h>") Signed-off-by: Wei Wang <wei.w.wang@intel.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Jan Kara <jack@suse.cz> Cc: Eric Biggers <ebiggers@google.com> Cc: Tejun Heo <tj@kernel.org> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Hocko <mhocko@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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