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Commit e8f24278 authored by Rasmus Villemoes's avatar Rasmus Villemoes Committed by Linus Torvalds
Browse files

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: default avatarRasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 9b6c2d2e

include/linux/bitmap.h

+4 −0
Original line number Diff line number Diff line
@@ -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);

lib/bitmap.c

+2 −0
Original line number Diff line number Diff line
@@ -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