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struct __genradix is defined as having its member 'root' annotated as __rcu. But in the corresponding API RCU is not used. Sparse reports this type mismatch as: lib/generic-radix-tree.c:56:35: warning: incorrect type in initializer (different address spaces) lib/generic-radix-tree.c:56:35: expected struct genradix_root *r lib/generic-radix-tree.c:56:35: got struct genradix_root [noderef] <asn:4> *__val with 6 other ones. So, correct root's type by removing this unneeded __rcu. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Kent Overstreet <kent.overstreet@gmail.com> Link: http://lkml.kernel.org/r/20200621161745.55396-1-luc.vanoostenryck@gmail.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>