linux-kernel - next-20210420 build breakage on 32-bit

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Message-ID: <697668.1618991971@turing-police>
Date:   Wed, 21 Apr 2021 03:59:31 -0400
From:   "Valdis Klētnieks" <valdis.kletnieks@...edu>
To:     Coly Li <colyli@...e.de>, Jianpeng Ma <jianpeng.ma@...el.com>,
        Qiaowei Ren <qiaowei.ren@...el.com>,
        Jens Axboe <axboe@...nel.dk>
Cc:     linux-kernel@...r.kernel.org
Subject: next-20210420 build breakage on 32-bit - include/uapi/linux/bcache-nvm.h

commit 97d69b16cb973e04ea5309b9cb4356aa6b42c54e
Author: Coly Li <colyli@...e.de>
Date:   Wed Apr 14 13:46:36 2021 +0800

    bcache: add initial data structures for nvm pages

contains this code:

+#if (__BITS_PER_LONG != 64)
+       #error "Non-64bit platform is not supported"
+#endif

This breaks the build on arm and other 32-bit systems:

  HDRTEST usr/include/linux/bcache-nvm.h
In file included from <command-line>:32:
./usr/include/linux/bcache-nvm.h:109:3: error: #error "Non-64bit platform is not supported"
  #error "Non-64bit platform is not supported"
   ^~~~~
make[3]: *** [/usr/src/linux-next/usr/include/Makefile:106: usr/include/linux/bcache-nvm.hdrtest] Error 1
make[2]: *** [/usr/src/linux-next/scripts/Makefile.build:534: usr/include] Error 2
make[1]: *** [/usr/src/linux-next/Makefile:1967: usr] Error 2


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