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[08/33] Add "ffs" inline function

Message ID 1466808476-32690-8-git-send-email-benh@kernel.crashing.org
State Accepted
Headers show

Commit Message

Benjamin Herrenschmidt June 24, 2016, 10:47 p.m. UTC 
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 libc/include/string.h | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Michael Neuling July 6, 2016, 7:17 a.m. UTC | #1 
On Sat, 2016-06-25 at 08:47 +1000, Benjamin Herrenschmidt wrote:
> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Acked-by: Michael Neuling <mikey@neuling.org>

> ---
>  libc/include/string.h | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/libc/include/string.h b/libc/include/string.h
> index 96b26fa..890ffc2 100644
> --- a/libc/include/string.h
> +++ b/libc/include/string.h
> @@ -35,4 +35,9 @@ void *memcpy(void *dest, const void *src, size_t n);
>  void *memmove(void *dest, const void *src, size_t n);
>  int memcmp(const void *s1, const void *s2, size_t n);
>  
> +static inline int ffs(unsigned long val)
> +{
> +	return __builtin_ffs(val);
> +}
> +
>  #endif
diff mbox

Patch

diff --git a/libc/include/string.h b/libc/include/string.h
index 96b26fa..890ffc2 100644
--- a/libc/include/string.h
+++ b/libc/include/string.h
@@ -35,4 +35,9 @@  void *memcpy(void *dest, const void *src, size_t n);
 void *memmove(void *dest, const void *src, size_t n);
 int memcmp(const void *s1, const void *s2, size_t n);
 
+static inline int ffs(unsigned long val)
+{
+	return __builtin_ffs(val);
+}
+
 #endif