linux-kernel - userspace breakage in linux/nfsd/debug.h

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Date:	Thu, 02 Apr 2015 10:42:46 -0400
From:	Mark Salter <msalter@...hat.com>
To:	Jeff Layton <jlayton@...marydata.com>
Cc:	Trond Myklebust <trond.myklebust@...marydata.com>,
	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: userspace breakage in linux/nfsd/debug.h

This patch:

  commit f895b252d4edf66b2895fb5a7b17a638665f3e1f
  Author: Jeff Layton <jlayton@...marydata.com>
  Date:   Mon Nov 17 16:58:04 2014 -0500

    sunrpc: eliminate RPC_DEBUG
    
    It's always set to whatever CONFIG_SUNRPC_DEBUG is, so just use that.
    
    Signed-off-by: Jeff Layton <jlayton@...marydata.com>
    Signed-off-by: Trond Myklebust <trond.myklebust@...marydata.com>

breaks userspace use of linux/nfsd/debug.h because of:

  diff --git a/include/uapi/linux/nfsd/debug.h b/include/uapi/linux/nfsd/debug.h
  index a6f453c..1fdc95b 100644
  --- a/include/uapi/linux/nfsd/debug.h
  +++ b/include/uapi/linux/nfsd/debug.h
  @@ -15,7 +15,7 @@
    * Enable debugging for nfsd.
    * Requires RPC_DEBUG.
    */
  -#ifdef RPC_DEBUG
  +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
   # define NFSD_DEBUG		1
   #endif
 
IS_ENABLED() is not available outside the kernel and causes a compile
time failure:

  /usr/include/linux/nfsd/debug.h:18:15: error: missing binary operator before token "("
 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)



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