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lib/bitmap.c: elide bitmap_copy_le on little-endian 

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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rasmus Villemoes 2015-02-13 14:36:00 -08:00 committed by Linus Torvalds
parent 9b6c2d2e2b
commit e8f2427832
2 changed files with 6 additions and 0 deletions
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4
include/linux/bitmap.h
View File

@ -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 unsigned int bitmap_ord_to_pos(const unsigned long *bitmap, unsigned int ord, unsigned int nbits);
extern int bitmap_print_to_pagebuf(bool list, char *buf,
const unsigned long *maskp, int nmaskbits);

2
lib/bitmap.c
View File

@ -1191,6 +1191,7 @@ 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;
@ -1203,3 +1204,4 @@ void bitmap_copy_le(unsigned long *dst, const unsigned long *src, unsigned int n
}
}
EXPORT_SYMBOL(bitmap_copy_le);
#endif