From: "Robert P. J. Day" <rpjday@crashcourse.ca>

For consistency with other architectures, warn about including
<asm-xtensa/rwsem.h> directly.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Cc: Christian Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/asm-xtensa/rwsem.h |    4 ++++
 1 file changed, 4 insertions(+)

diff -puN include/asm-xtensa/rwsem.h~xtensa-warn-about-including-asm-rwsemh-directly include/asm-xtensa/rwsem.h
--- a/include/asm-xtensa/rwsem.h~xtensa-warn-about-including-asm-rwsemh-directly
+++ a/include/asm-xtensa/rwsem.h
@@ -13,6 +13,10 @@
 #ifndef _XTENSA_RWSEM_H
 #define _XTENSA_RWSEM_H
 
+#ifndef _LINUX_RWSEM_H
+#error "Please don't include <asm/rwsem.h> directly, use <linux/rwsem.h> instead."
+#endif
+
 #include <linux/list.h>
 #include <linux/spinlock.h>
 #include <asm/atomic.h>
_