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authorJ. Bruce Fields <bfields@redhat.com>2012-10-09 22:35:22 (GMT)
committerJ. Bruce Fields <bfields@redhat.com>2012-10-09 22:35:22 (GMT)
commitf474af7051212b4efc8267583fad9c4ebf33ccff (patch)
tree1aa46ebc8065a341f247c2a2d9af2f624ad1d4f8 /include/asm-generic/bitops/builtin-fls.h
parent0d22f68f02c10d5d10ec5712917e5828b001a822 (diff)
parente3dd9a52cb5552c46c2a4ca7ccdfb4dab5c72457 (diff)
downloadlinux-f474af7051212b4efc8267583fad9c4ebf33ccff.tar.xz
nfs: disintegrate UAPI for nfs
This is to complete part of the Userspace API (UAPI) disintegration for which the preparatory patches were pulled recently. After these patches, userspace headers will be segregated into: include/uapi/linux/.../foo.h for the userspace interface stuff, and: include/linux/.../foo.h for the strictly kernel internal stuff. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'include/asm-generic/bitops/builtin-fls.h')
-rw-r--r--include/asm-generic/bitops/builtin-fls.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/asm-generic/bitops/builtin-fls.h b/include/asm-generic/bitops/builtin-fls.h
new file mode 100644
index 0000000..eda652d
--- /dev/null
+++ b/include/asm-generic/bitops/builtin-fls.h
@@ -0,0 +1,16 @@
+#ifndef _ASM_GENERIC_BITOPS_BUILTIN_FLS_H_
+#define _ASM_GENERIC_BITOPS_BUILTIN_FLS_H_
+
+/**
+ * fls - find last (most-significant) bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as ffs.
+ * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
+ */
+static __always_inline int fls(int x)
+{
+ return x ? sizeof(x) * 8 - __builtin_clz(x) : 0;
+}
+
+#endif