1 /* SPDX-License-Identifier: GPL-2.0 */
6  * Copyright (C) 1998-2003 Hewlett-Packard Co
7  *	David Mosberger-Tang <davidm@hpl.hp.com>
23  * set_bit - Atomically set a bit in memory
30  * restricted to acting on a single-word quantity.
34  * operate on hw-defined data-structures, so we can't easily change these
40 set_bit (int nr, volatile void *addr)  in set_bit()
43 	volatile __u32 *m;  in set_bit()
46 	m = (volatile __u32 *) addr + (nr >> 5);  in set_bit()
56  * __set_bit - Set a bit in memory
60  * Unlike set_bit(), this function is non-atomic and may be reordered.
65 __set_bit (int nr, volatile void *addr)  in __set_bit()
71  * clear_bit - Clears a bit in memory
81 clear_bit (int nr, volatile void *addr)  in clear_bit()
84 	volatile __u32 *m;  in clear_bit()
87 	m = (volatile __u32 *) addr + (nr >> 5);  in clear_bit()
97  * clear_bit_unlock - Clears a bit in memory with release
105 clear_bit_unlock (int nr, volatile void *addr)  in clear_bit_unlock()
108 	volatile __u32 *m;  in clear_bit_unlock()
111 	m = (volatile __u32 *) addr + (nr >> 5);  in clear_bit_unlock()
121  * __clear_bit_unlock - Non-atomically clears a bit in memory with release
138  * __clear_bit - Clears a bit in memory (non-atomic version)
142  * Unlike clear_bit(), this function is non-atomic and may be reordered.
147 __clear_bit (int nr, volatile void *addr)  in __clear_bit()
153  * change_bit - Toggle a bit in memory
159  * restricted to acting on a single-word quantity.
162 change_bit (int nr, volatile void *addr)  in change_bit()
165 	volatile __u32 *m;  in change_bit()
168 	m = (volatile __u32 *) addr + (nr >> 5);  in change_bit()
178  * __change_bit - Toggle a bit in memory
182  * Unlike change_bit(), this function is non-atomic and may be reordered.
187 __change_bit (int nr, volatile void *addr)  in __change_bit()
193  * test_and_set_bit - Set a bit and return its old value
201 test_and_set_bit (int nr, volatile void *addr)  in test_and_set_bit()
204 	volatile __u32 *m;  in test_and_set_bit()
207 	m = (volatile __u32 *) addr + (nr >> 5);  in test_and_set_bit()
218  * test_and_set_bit_lock - Set a bit and return its old value for lock
227  * __test_and_set_bit - Set a bit and return its old value
231  * This operation is non-atomic and can be reordered.  
236 __test_and_set_bit (int nr, volatile void *addr)  in __test_and_set_bit()
247  * test_and_clear_bit - Clear a bit and return its old value
255 test_and_clear_bit (int nr, volatile void *addr)  in test_and_clear_bit()
258 	volatile __u32 *m;  in test_and_clear_bit()
261 	m = (volatile __u32 *) addr + (nr >> 5);  in test_and_clear_bit()
272  * __test_and_clear_bit - Clear a bit and return its old value
276  * This operation is non-atomic and can be reordered.  
281 __test_and_clear_bit(int nr, volatile void * addr)  in __test_and_clear_bit()
292  * test_and_change_bit - Change a bit and return its old value
300 test_and_change_bit (int nr, volatile void *addr)  in test_and_change_bit()
303 	volatile __u32 *m;  in test_and_change_bit()
306 	m = (volatile __u32 *) addr + (nr >> 5);  in test_and_change_bit()
317  * __test_and_change_bit - Change a bit and return its old value
321  * This operation is non-atomic and can be reordered.
335 test_bit (int nr, const volatile void *addr)  in test_bit()
337 	return 1 & (((const volatile __u32 *) addr)[nr >> 5] >> (nr & 31));  in test_bit()
341  * ffz - find the first zero bit in a long word
344  * Returns the bit-number (0..63) of the first (least significant) zero bit.
352 	result = ia64_popcnt(x & (~x - 1));  in ffz()
357  * __ffs - find first bit in word.
367 	result = ia64_popcnt((x-1) & ~x);  in __ffs()
374  * Return bit number of last (most-significant) bit set.  Undefined
384 	return exp - 0xffff;  in ia64_fls()
418 	return ia64_popcnt(x) - 1;  in __fls()
421 #include <asm-generic/bitops/fls64.h>
423 #include <asm-generic/bitops/builtin-ffs.h>
427  * of bits set) of a N-bit word
440 #include <asm-generic/bitops/const_hweight.h>
444 #include <asm-generic/bitops/find.h>
448 #include <asm-generic/bitops/le.h>
450 #include <asm-generic/bitops/ext2-atomic-setbit.h>
452 #include <asm-generic/bitops/sched.h>