Chapter 3. Basic Kernel Library Functions

Table of Contents

Bitmap Operations
Command-line Parsing
CRC Functions
idr/ida Functions

The Linux kernel provides more basic utility functions.

Bitmap Operations

__bitmap_shift_right - logical right shift of the bits in a bitmap
__bitmap_shift_left - logical left shift of the bits in a bitmap
bitmap_scnprintf - convert bitmap to an ASCII hex string.
__bitmap_parse - convert an ASCII hex string into a bitmap.
bitmap_parse_user - convert an ASCII hex string in a user buffer into a bitmap
bitmap_scnlistprintf - convert bitmap to list format ASCII string
bitmap_parselist_user -
bitmap_remap - Apply map defined by a pair of bitmaps to another bitmap
bitmap_bitremap - Apply map defined by a pair of bitmaps to a single bit
bitmap_onto - translate one bitmap relative to another
bitmap_fold - fold larger bitmap into smaller, modulo specified size
bitmap_find_free_region - find a contiguous aligned mem region
bitmap_release_region - release allocated bitmap region
bitmap_allocate_region - allocate bitmap region
bitmap_copy_le - copy a bitmap, putting the bits into little-endian order.
__bitmap_parselist - convert list format ASCII string to bitmap
bitmap_pos_to_ord - find ordinal of set bit at given position in bitmap
bitmap_ord_to_pos - find position of n-th set bit in bitmap