This is a note to let you know that I've just added the patch titled radix tree test suite: Fix compilation to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: radix-tree-test-suite-fix-compilation.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 651bc91b26012a5c0e553675373425b4b975cde5 Author: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Date: Tue Mar 30 13:44:35 2021 -0400 radix tree test suite: Fix compilation [ Upstream commit 7487de534dcbe143e6f41da751dd3ffcf93b00ee ] Commit 4bba4c4bb09a added tools/include/linux/compiler_types.h which includes linux/compiler-gcc.h. Unfortunately, we had our own (empty) compiler_types.h which overrode the one added by that commit, and so we lost the definition of __must_be_array(). Removing our empty compiler_types.h fixes the problem and reduces our divergence from the rest of the tools. Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/tools/testing/radix-tree/linux/compiler_types.h b/tools/testing/radix-tree/linux/compiler_types.h deleted file mode 100644 index e69de29bb2d1..000000000000