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authorArnd Bergmann <arnd@arndb.de>2009-05-14 02:56:32 +0400
committerArnd Bergmann <arnd@klappe2.(none)>2009-06-11 23:02:31 +0400
commit9858c60cc2d33b18367b2bc6947e3ea23db26ccb (patch)
tree7c16d44461bbecf58257c5b6344f1ed01d137a79 /include
parentd7c4f1b78afeedfc22b1756fcdc1acbe84284d74 (diff)
downloadlinux-9858c60cc2d33b18367b2bc6947e3ea23db26ccb.tar.xz
asm-generic: make bitops.h usable
bitops.h apparently suffered from some level of bitrot, it was missing the smp_mb__{before,after}_clear_bit functions, and included other headers in an invalid order. This changes the file so that new architectures can use it out of the box. Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include')
-rw-r--r--include/asm-generic/bitops.h24
1 files changed, 18 insertions, 6 deletions
diff --git a/include/asm-generic/bitops.h b/include/asm-generic/bitops.h
index c9f369c4bd7e..a54f4421a24d 100644
--- a/include/asm-generic/bitops.h
+++ b/include/asm-generic/bitops.h
@@ -1,19 +1,29 @@
-#ifndef _ASM_GENERIC_BITOPS_H_
-#define _ASM_GENERIC_BITOPS_H_
+#ifndef __ASM_GENERIC_BITOPS_H
+#define __ASM_GENERIC_BITOPS_H
/*
* For the benefit of those who are trying to port Linux to another
* architecture, here are some C-language equivalents. You should
* recode these in the native assembly language, if at all possible.
- *
+ *
* C language equivalents written by Theodore Ts'o, 9/26/92
*/
-#include <asm-generic/bitops/atomic.h>
-#include <asm-generic/bitops/non-atomic.h>
+#include <linux/irqflags.h>
+#include <linux/compiler.h>
+
+/*
+ * clear_bit may not imply a memory barrier
+ */
+#ifndef smp_mb__before_clear_bit
+#define smp_mb__before_clear_bit() smp_mb()
+#define smp_mb__after_clear_bit() smp_mb()
+#endif
+
#include <asm-generic/bitops/__ffs.h>
#include <asm-generic/bitops/ffz.h>
#include <asm-generic/bitops/fls.h>
+#include <asm-generic/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>
#include <asm-generic/bitops/find.h>
@@ -26,8 +36,10 @@
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/lock.h>
+#include <asm-generic/bitops/atomic.h>
+#include <asm-generic/bitops/non-atomic.h>
#include <asm-generic/bitops/ext2-non-atomic.h>
#include <asm-generic/bitops/ext2-atomic.h>
#include <asm-generic/bitops/minix.h>
-#endif /* _ASM_GENERIC_BITOPS_H */
+#endif /* __ASM_GENERIC_BITOPS_H */