linux-kernel - [PATCH 01/14] Remove #ifdef CONFIG_64BIT from all asm-generic/fcntl.h

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Message-Id: <1447119071-19392-2-git-send-email-palmer@dabbelt.com>
Date:	Mon,  9 Nov 2015 17:30:58 -0800
From:	Palmer Dabbelt <palmer@...belt.com>
To:	peterz@...radead.org
Cc:	Palmer Dabbelt <palmer@...belt.com>
Subject: [PATCH 01/14] Remove #ifdef CONFIG_64BIT from all asm-generic/fcntl.h

When working on the RISC-V port I noticed that F_SETLK64 was being
defined on our 64-bit platform, despite our port being so new that
we've only ever had the 64-bit file ops.  Since there's not compat
layer for these, this causes fcntl to bail out.

It turns out that one of the ways in with F_SETLK64 was being defined
(there's some more in glibc, but that's a whole different story... :))
is the result of CONFIG_64BIT showing up in this user-visible header.
<asm-generic/bitsperlong.h> confirms this isn't sane, so I replaced it
with a __BITS_PER_LONG check.

Signed-off-by: Palmer Dabbelt <palmer@...belt.com>
Reviewed-by: Andrew Waterman <waterman@...s.berkeley.edu>
Reviewed-by: Albert Ou <aou@...s.berkeley.edu>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
---
 include/uapi/asm-generic/fcntl.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/uapi/asm-generic/fcntl.h b/include/uapi/asm-generic/fcntl.h
index e063eff..14a5c82 100644
--- a/include/uapi/asm-generic/fcntl.h
+++ b/include/uapi/asm-generic/fcntl.h
@@ -1,6 +1,7 @@
 #ifndef _ASM_GENERIC_FCNTL_H
 #define _ASM_GENERIC_FCNTL_H
 
+#include <asm/bitsperlong.h>
 #include <linux/types.h>
 
 /*
@@ -115,7 +116,7 @@
 #define F_GETSIG	11	/* for sockets. */
 #endif
 
-#ifndef CONFIG_64BIT
+#if (__BITS_PER_LONG == 32)
 #ifndef F_GETLK64
 #define F_GETLK64	12	/*  using 'struct flock64' */
 #define F_SETLK64	13
-- 
2.4.10

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