fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-sparc / bitops.h
blob329e696e77516c8511ec0a04972aeefafabf16d3
1 /* $Id: bitops.h,v 1.67 2001/11/19 18:36:34 davem Exp $
2 * bitops.h: Bit string operations on the Sparc.
4 * Copyright 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright 1996 Eddie C. Dost (ecd@skynet.be)
6 * Copyright 2001 Anton Blanchard (anton@samba.org)
7 */
9 #ifndef _SPARC_BITOPS_H
10 #define _SPARC_BITOPS_H
12 #include <linux/compiler.h>
13 #include <asm/byteorder.h>
15 #ifdef __KERNEL__
17 extern unsigned long ___set_bit(unsigned long *addr, unsigned long mask);
18 extern unsigned long ___clear_bit(unsigned long *addr, unsigned long mask);
19 extern unsigned long ___change_bit(unsigned long *addr, unsigned long mask);
22 * Set bit 'nr' in 32-bit quantity at address 'addr' where bit '0'
23 * is in the highest of the four bytes and bit '31' is the high bit
24 * within the first byte. Sparc is BIG-Endian. Unless noted otherwise
25 * all bit-ops return 0 if bit was previously clear and != 0 otherwise.
27 static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr)
29 unsigned long *ADDR, mask;
31 ADDR = ((unsigned long *) addr) + (nr >> 5);
32 mask = 1 << (nr & 31);
34 return ___set_bit(ADDR, mask) != 0;
37 static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
39 unsigned long *ADDR, mask;
41 ADDR = ((unsigned long *) addr) + (nr >> 5);
42 mask = 1 << (nr & 31);
44 (void) ___set_bit(ADDR, mask);
47 static inline int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr)
49 unsigned long *ADDR, mask;
51 ADDR = ((unsigned long *) addr) + (nr >> 5);
52 mask = 1 << (nr & 31);
54 return ___clear_bit(ADDR, mask) != 0;
57 static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
59 unsigned long *ADDR, mask;
61 ADDR = ((unsigned long *) addr) + (nr >> 5);
62 mask = 1 << (nr & 31);
64 (void) ___clear_bit(ADDR, mask);
67 static inline int test_and_change_bit(unsigned long nr, volatile unsigned long *addr)
69 unsigned long *ADDR, mask;
71 ADDR = ((unsigned long *) addr) + (nr >> 5);
72 mask = 1 << (nr & 31);
74 return ___change_bit(ADDR, mask) != 0;
77 static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
79 unsigned long *ADDR, mask;
81 ADDR = ((unsigned long *) addr) + (nr >> 5);
82 mask = 1 << (nr & 31);
84 (void) ___change_bit(ADDR, mask);
87 #include <asm-generic/bitops/non-atomic.h>
89 #define smp_mb__before_clear_bit() do { } while(0)
90 #define smp_mb__after_clear_bit() do { } while(0)
92 #include <asm-generic/bitops/ffz.h>
93 #include <asm-generic/bitops/__ffs.h>
94 #include <asm-generic/bitops/sched.h>
95 #include <asm-generic/bitops/ffs.h>
96 #include <asm-generic/bitops/fls.h>
97 #include <asm-generic/bitops/fls64.h>
98 #include <asm-generic/bitops/hweight.h>
99 #include <asm-generic/bitops/find.h>
100 #include <asm-generic/bitops/ext2-non-atomic.h>
101 #include <asm-generic/bitops/ext2-atomic.h>
102 #include <asm-generic/bitops/minix.h>
104 #endif /* __KERNEL__ */
106 #endif /* defined(_SPARC_BITOPS_H) */