commit 0624517d809b1cf53c977335c9bda4c216cbddee
author Jiri Slaby <jirislaby@gmail.com> Thu Oct 18 23:40:26 2007 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> Fri Oct 19 11:53:41 2007 -0700
tree 5791430160f4423cab3c6085baed815e10c421f7
parent 1977f032722c27ee3730284582fd3991ad9ac81b

forbid asm/bitops.h direct inclusion

forbid asm/bitops.h direct inclusion

Because of compile errors that may occur after bit changes if asm/bitops.h is
included directly without e.g.  linux/kernel.h which includes linux/bitops.h,
forbid direct inclusion of asm/bitops.h.  Thanks to Adrian Bunk.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/asm-x86/bitops_64.h

diff --git a/include/asm-x86/bitops_64.h b/include/asm-x86/bitops_64.h
index 525edf2..dacaa5f 100644
--- a/include/asm-x86/bitops_64.h
+++ b/include/asm-x86/bitops_64.h
@@ -5,6 +5,10 @@
  * Copyright 1992, Linus Torvalds.
  */
 
+#ifndef _LINUX_BITOPS_H
+#error only <linux/bitops.h> can be included directly
+#endif
+
 #include <asm/alternative.h>
 
 #if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)