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| author | Serge Hallyn <serge.hallyn@ubuntu.com> | 2014-04-03 14:48:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-03 16:21:06 -0700 |
| commit | ea1a8217b06b41b31a2b60b0b83f75c77ef9c873 (patch) | |
| tree | bfff18284431af103bb746ea570cd09874b2b87c | |
| parent | e9107f88c985bcda5a8ec692cd692005738136f1 (diff) | |
| download | linux-stable-ea1a8217b06b41b31a2b60b0b83f75c77ef9c873.tar.gz linux-stable-ea1a8217b06b41b31a2b60b0b83f75c77ef9c873.tar.bz2 linux-stable-ea1a8217b06b41b31a2b60b0b83f75c77ef9c873.zip | |
xattr: guard against simultaneous glibc header inclusion
If the glibc xattr.h header is included after the uapi header,
compilation fails due to an enum re-using a #define from the uapi
header.
Protect against this by guarding the define and enum inclusions against
each other.
(See https://lists.debian.org/debian-glibc/2014/03/msg00029.html
and https://sourceware.org/glibc/wiki/Synchronizing_Headers
for more information.)
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Allan McRae <allan@archlinux.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/uapi/linux/libc-compat.h | 9 | ||||
| -rw-r--r-- | include/uapi/linux/xattr.h | 7 |
2 files changed, 16 insertions, 0 deletions
diff --git a/include/uapi/linux/libc-compat.h b/include/uapi/linux/libc-compat.h index 335e8a7cad39..c140620dad92 100644 --- a/include/uapi/linux/libc-compat.h +++ b/include/uapi/linux/libc-compat.h @@ -85,6 +85,12 @@ #endif /* _NETINET_IN_H */ +/* Definitions for xattr.h */ +#if defined(_SYS_XATTR_H) +#define __UAPI_DEF_XATTR 0 +#else +#define __UAPI_DEF_XATTR 1 +#endif /* If we did not see any headers from any supported C libraries, * or we are being included in the kernel, then define everything @@ -98,6 +104,9 @@ #define __UAPI_DEF_IPV6_MREQ 1 #define __UAPI_DEF_IPPROTO_V6 1 +/* Definitions for xattr.h */ +#define __UAPI_DEF_XATTR 1 + #endif /* __GLIBC__ */ #endif /* _UAPI_LIBC_COMPAT_H */ diff --git a/include/uapi/linux/xattr.h b/include/uapi/linux/xattr.h index 40bbc04b6f81..c38355c1f3c9 100644 --- a/include/uapi/linux/xattr.h +++ b/include/uapi/linux/xattr.h @@ -7,11 +7,18 @@ Copyright (c) 2001-2002 Silicon Graphics, Inc. All Rights Reserved. Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> */ + +#include <linux/libc-compat.h> + #ifndef _UAPI_LINUX_XATTR_H #define _UAPI_LINUX_XATTR_H +#ifdef __UAPI_DEF_XATTR +#define __USE_KERNEL_XATTR_DEFS + #define XATTR_CREATE 0x1 /* set value, fail if attr already exists */ #define XATTR_REPLACE 0x2 /* set value, fail if attr does not exist */ +#endif /* Namespaces */ #define XATTR_OS2_PREFIX "os2." |