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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>
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@ -85,6 +85,12 @@
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#endif /* _NETINET_IN_H */
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/* Definitions for xattr.h */
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#if defined(_SYS_XATTR_H)
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#define __UAPI_DEF_XATTR 0
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#else
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#define __UAPI_DEF_XATTR 1
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#endif
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/* If we did not see any headers from any supported C libraries,
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* or we are being included in the kernel, then define everything
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@ -98,6 +104,9 @@
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#define __UAPI_DEF_IPV6_MREQ 1
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#define __UAPI_DEF_IPPROTO_V6 1
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/* Definitions for xattr.h */
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#define __UAPI_DEF_XATTR 1
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#endif /* __GLIBC__ */
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#endif /* _UAPI_LIBC_COMPAT_H */
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@ -7,11 +7,18 @@
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Copyright (c) 2001-2002 Silicon Graphics, Inc. All Rights Reserved.
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Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
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*/
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#include <linux/libc-compat.h>
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#ifndef _UAPI_LINUX_XATTR_H
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#define _UAPI_LINUX_XATTR_H
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#ifdef __UAPI_DEF_XATTR
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#define __USE_KERNEL_XATTR_DEFS
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#define XATTR_CREATE 0x1 /* set value, fail if attr already exists */
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#define XATTR_REPLACE 0x2 /* set value, fail if attr does not exist */
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#endif
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/* Namespaces */
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#define XATTR_OS2_PREFIX "os2."
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