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Date:   Mon, 16 Jul 2018 20:18:11 -0700
From:   Matthew Wilcox <willy@infradead.org>
To:     Ross Zwisler <ross.zwisler@linux.intel.com>
Cc:     kbuild test robot <lkp@intel.com>, kbuild-all@01.org,
        Andrew Morton <akpm@linux-foundation.org>,
        linux-kernel@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
        Dan Williams <dan.j.williams@intel.com>,
        Dave Chinner <david@fromorbit.com>, Jan Kara <jack@suse.cz>,
        linux-nvdimm@lists.01.org
Subject: Re: [PATCH 1/5] radix tree test suite: fix mapshift build target
Message-ID: <20180717031811.GD7934@bombadil.infradead.org>
References: <20180503192430.7582-1-ross.zwisler@linux.intel.com>
 <20180503192430.7582-2-ross.zwisler@linux.intel.com>
 <20180715230052.GA6486@bombadil.infradead.org>
 <20180716160710.GA2287@linux.intel.com>
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On Mon, Jul 16, 2018 at 10:07:10AM -0600, Ross Zwisler wrote:
> Incidentally, in the current linux/master the radix tree test suite again
> fails to build:
> 
>   $ make
>   sed -e 's/^static //' -e 's/__always_inline //' -e 's/inline //' < ../../../lib/radix-tree.c > radix-tree.c
>   sed -e 's/^static //' -e 's/__always_inline //' -e 's/inline //' < ../../../lib/idr.c > idr.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o main.o main.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o linux.o linux.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o test.o test.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o find_bit.o ../../lib/find_bit.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o regression1.o regression1.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o regression2.o regression2.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o regression3.o regression3.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o tag_check.o tag_check.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o multiorder.o multiorder.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o idr-test.o idr-test.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o iteration_check.o iteration_check.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o benchmark.o benchmark.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o idr.o idr.c
>   cc -I. -I../../include -g -O2 -Wall -D_LGPL_SOURCE -fsanitize=address   -c -o radix-tree.o radix-tree.c
>   idr.c:7:10: fatal error: linux/xarray.h: No such file or directory
>    #include <linux/xarray.h>
>             ^~~~~~~~~~~~~~~~
>   compilation terminated.

Umm.  I think I know the problem here.  I have a suspicion that either
Fedora or you have changed make to be parallel by default (or you're
lying to me and saying you typed 'make' when you actually typed 'make
-j4', but I'm pretty sure you wouldn't do that).  Because there's no
way you'd get this output if you were compiling with make -j1.

Indeed, if I revert your commit and then build with make -j4, I see the
same error as you.  I'll look at how to fix this properly tomorrow.