diff options
| -rw-r--r-- | include/linux/bitmap.h | 8 | ||||
| -rw-r--r-- | lib/bitmap.c | 20 |
2 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 714ce4a5e31f..39d47af6ca7b 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -84,6 +84,14 @@ */ /* + * Allocation and deallocation of bitmap. + * Provided in lib/bitmap.c to avoid circular dependency. + */ +extern unsigned long *bitmap_alloc(unsigned int nbits, gfp_t flags); +extern unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags); +extern void bitmap_free(const unsigned long *bitmap); + +/* * lib/bitmap.c provides these functions: */ diff --git a/lib/bitmap.c b/lib/bitmap.c index 814814397cce..bdf572d09b8f 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -12,6 +12,7 @@ #include <linux/bitmap.h> #include <linux/bitops.h> #include <linux/bug.h> +#include <linux/slab.h> #include <asm/page.h> #include <asm/uaccess.h> @@ -1081,3 +1082,22 @@ void bitmap_copy_le(unsigned long *dst, const unsigned long *src, unsigned int n } EXPORT_SYMBOL(bitmap_copy_le); #endif + +unsigned long *bitmap_alloc(unsigned int nbits, gfp_t flags) +{ + return kmalloc_array(BITS_TO_LONGS(nbits), sizeof(unsigned long), + flags); +} +EXPORT_SYMBOL(bitmap_alloc); + +unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags) +{ + return bitmap_alloc(nbits, flags | __GFP_ZERO); +} +EXPORT_SYMBOL(bitmap_zalloc); + +void bitmap_free(const unsigned long *bitmap) +{ + kfree(bitmap); +} +EXPORT_SYMBOL(bitmap_free); |