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Subject[PATCH 2/2] lib/bitmap.c: Elide bitmap_copy_le on little-endian
Date
On little-endian, there's no reason to have an extra, presumably less
efficient, way of copying a bitmap.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
---
include/linux/bitmap.h | 4 ++++
lib/bitmap.c | 2 ++
2 files changed, 6 insertions(+)

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index bd1748919872..a1977e153e63 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -170,7 +170,11 @@ extern void bitmap_fold(unsigned long *dst, const unsigned long *orig,
extern int bitmap_find_free_region(unsigned long *bitmap, unsigned int bits, int order);
extern void bitmap_release_region(unsigned long *bitmap, unsigned int pos, int order);
extern int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order);
+#ifdef __BIG_ENDIAN
extern void bitmap_copy_le(unsigned long *dst, const unsigned long *src, unsigned int nbits);
+#else
+#define bitmap_copy_le bitmap_copy
+#endif
extern int bitmap_ord_to_pos(const unsigned long *bitmap, int n, int bits);
extern int bitmap_print_to_pagebuf(bool list, char *buf,
const unsigned long *maskp, int nmaskbits);
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 5ded9180528b..8014996b1531 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -1207,6 +1207,7 @@ EXPORT_SYMBOL(bitmap_allocate_region);
*
* Require nbits % BITS_PER_LONG == 0.
*/
+#ifdef __BIG_ENDIAN
void bitmap_copy_le(unsigned long *dst, const unsigned long *src, unsigned int nbits)
{
unsigned int i;
@@ -1219,3 +1220,4 @@ void bitmap_copy_le(unsigned long *dst, const unsigned long *src, unsigned int n
}
}
EXPORT_SYMBOL(bitmap_copy_le);
+#endif
--
2.1.3


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