path: root/tools/testing/radix-tree/linux/kernel.h
diff options
authorMatthew Wilcox <willy@linux.intel.com>2016-12-14 15:08:29 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-14 16:04:10 -0800
commit0629573e6bbd60f20ed2d7a91da1214a6274e751 (patch)
treeaed29e29406c6250a834586b2a45f84152db7c80 /tools/testing/radix-tree/linux/kernel.h
parenttools: add more bitmap functions (diff)
radix tree test suite: use common find-bit code
Remove the old find_next_bit code in favour of linking in the find_bit code from tools/lib. Link: http://lkml.kernel.org/r/1480369871-5271-48-git-send-email-mawilcox@linuxonhyperv.com Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/testing/radix-tree/linux/kernel.h b/tools/testing/radix-tree/linux/kernel.h
index dbe4b92806b8..23e77f5673ce 100644
--- a/tools/testing/radix-tree/linux/kernel.h
+++ b/tools/testing/radix-tree/linux/kernel.h
@@ -47,4 +47,15 @@ static inline int in_interrupt(void)
return 0;
+ * This looks more complex than it should be. But we need to
+ * get the type for the ~ right in round_down (it needs to be
+ * as wide as the result!), and we want to evaluate the macro
+ * arguments just once each.
+ */
+#define __round_mask(x, y) ((__typeof__(x))((y)-1))
+#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
+#define round_down(x, y) ((x) & ~__round_mask(x, y))
#endif /* _KERNEL_H */