[tip:x86/headers] x86/headers: Fix (old) header file dependency bug in uapi/asm/sigcontext32.h

[tip-bot for Ingo Molnar]

Commit-ID:  b76cb6c869b966b4c991251136b45b3e1babc4e8
Gitweb:     http://git.kernel.org/tip/b76cb6c869b966b4c991251136b45b3e1babc4e8
Author:     Ingo Molnar <mingo@xxxxxxxxxx>
AuthorDate: Sat, 5 Sep 2015 09:32:29 +0200
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 8 Sep 2015 10:03:55 +0200

x86/headers: Fix (old) header file dependency bug in uapi/asm/sigcontext32.h

Mikko Rapeli reported that the following standalone user-space
header does not compile:

  #include <asm/sigcontext32.h>

Due to undefined 'struct __fpx_sw_bytes' which is defined in
asm/sigcontext.h.

The following header order works:

  #include <asm/sigcontext.h>
  #include <asm/sigcontext32.h>

and that's probably how everyone's been using these headers for
the past decade or so, but it's a legit header file dependency
bug, so include asm/sigcontext.h in sigcontext32.h to allow it
to be built standlone.

Reported-by: Mikko Rapeli <mikko.rapeli@xxxxxx>
Acked-by: Mikko Rapeli <mikko.rapeli@xxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Brian Gerst <brgerst@xxxxxxxxx>
Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/1441438363-9999-2-git-send-email-mingo@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 arch/x86/include/uapi/asm/sigcontext32.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/include/uapi/asm/sigcontext32.h b/arch/x86/include/uapi/asm/sigcontext32.h
index ad1478c..ff7826c 100644
--- a/arch/x86/include/uapi/asm/sigcontext32.h
+++ b/arch/x86/include/uapi/asm/sigcontext32.h
@@ -3,6 +3,8 @@
 
 #include <linux/types.h>
 
+#include <asm/sigcontext.h>
+
 /* signal context for 32bit programs. */
 
 #define X86_FXSR_MAGIC		0x0000
--
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