[PATCH] bitops: m32r: use generic bitops
- remove __{,test_and_}{set,clear,change}_bit() and test_bit()
- remove ffz()
- remove find_{next,first}{,_zero}_bit()
- remove __ffs()
- remove generic_fls()
- remove generic_fls64()
- remove sched_find_first_bit()
- remove generic_ffs()
- remove generic_hweight{32,16,8}()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
- remove ext2_{set,clear}_bit_atomic()
- remove minix_{test,set,test_and_clear,test,find_first_zero}_bit()
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Akinobu Mita
Linus Torvalds
parent
2875aef8bd
commit
6d9f937b55
2 changed files with 20 additions and 445 deletions
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@ -214,6 +214,14 @@ config RWSEM_XCHGADD_ALGORITHM
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bool
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bool
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default n
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default n
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config GENERIC_FIND_NEXT_BIT
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bool
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default y
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config GENERIC_HWEIGHT
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bool
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default y
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config GENERIC_CALIBRATE_DELAY
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config GENERIC_CALIBRATE_DELAY
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bool
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bool
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default y
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default y
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@ -62,25 +62,6 @@ static __inline__ void set_bit(int nr, volatile void * addr)
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local_irq_restore(flags);
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local_irq_restore(flags);
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}
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}
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/**
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* __set_bit - Set a bit in memory
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* @nr: the bit to set
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* @addr: the address to start counting from
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*
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* Unlike set_bit(), this function is non-atomic and may be reordered.
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* If it's called on the same region of memory simultaneously, the effect
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* may be that only one operation succeeds.
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*/
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static __inline__ void __set_bit(int nr, volatile void * addr)
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{
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__u32 mask;
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volatile __u32 *a = addr;
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a += (nr >> 5);
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mask = (1 << (nr & 0x1F));
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*a |= mask;
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}
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/**
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/**
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* clear_bit - Clears a bit in memory
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* clear_bit - Clears a bit in memory
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* @nr: Bit to clear
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* @nr: Bit to clear
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@ -118,38 +99,9 @@ static __inline__ void clear_bit(int nr, volatile void * addr)
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local_irq_restore(flags);
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local_irq_restore(flags);
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}
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}
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static __inline__ void __clear_bit(int nr, volatile unsigned long * addr)
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{
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unsigned long mask;
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volatile unsigned long *a = addr;
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a += (nr >> 5);
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mask = (1 << (nr & 0x1F));
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*a &= ~mask;
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}
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#define smp_mb__before_clear_bit() barrier()
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#define smp_mb__before_clear_bit() barrier()
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#define smp_mb__after_clear_bit() barrier()
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#define smp_mb__after_clear_bit() barrier()
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/**
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* __change_bit - Toggle a bit in memory
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* @nr: the bit to set
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* @addr: the address to start counting from
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*
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* Unlike change_bit(), this function is non-atomic and may be reordered.
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* If it's called on the same region of memory simultaneously, the effect
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* may be that only one operation succeeds.
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*/
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static __inline__ void __change_bit(int nr, volatile void * addr)
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{
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__u32 mask;
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volatile __u32 *a = addr;
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a += (nr >> 5);
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mask = (1 << (nr & 0x1F));
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*a ^= mask;
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}
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/**
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/**
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* change_bit - Toggle a bit in memory
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* change_bit - Toggle a bit in memory
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* @nr: Bit to clear
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* @nr: Bit to clear
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@ -220,28 +172,6 @@ static __inline__ int test_and_set_bit(int nr, volatile void * addr)
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return (oldbit != 0);
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return (oldbit != 0);
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}
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}
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/**
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* __test_and_set_bit - Set a bit and return its old value
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* @nr: Bit to set
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* @addr: Address to count from
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*
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* This operation is non-atomic and can be reordered.
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* If two examples of this operation race, one can appear to succeed
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* but actually fail. You must protect multiple accesses with a lock.
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*/
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static __inline__ int __test_and_set_bit(int nr, volatile void * addr)
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{
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__u32 mask, oldbit;
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volatile __u32 *a = addr;
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a += (nr >> 5);
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mask = (1 << (nr & 0x1F));
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oldbit = (*a & mask);
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*a |= mask;
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return (oldbit != 0);
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}
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/**
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/**
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* test_and_clear_bit - Clear a bit and return its old value
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* test_and_clear_bit - Clear a bit and return its old value
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* @nr: Bit to set
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* @nr: Bit to set
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@ -279,42 +209,6 @@ static __inline__ int test_and_clear_bit(int nr, volatile void * addr)
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return (oldbit != 0);
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return (oldbit != 0);
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}
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}
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/**
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* __test_and_clear_bit - Clear a bit and return its old value
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* @nr: Bit to set
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* @addr: Address to count from
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*
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* This operation is non-atomic and can be reordered.
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* If two examples of this operation race, one can appear to succeed
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* but actually fail. You must protect multiple accesses with a lock.
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*/
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static __inline__ int __test_and_clear_bit(int nr, volatile void * addr)
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{
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__u32 mask, oldbit;
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volatile __u32 *a = addr;
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a += (nr >> 5);
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mask = (1 << (nr & 0x1F));
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oldbit = (*a & mask);
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*a &= ~mask;
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return (oldbit != 0);
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}
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/* WARNING: non atomic and it can be reordered! */
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static __inline__ int __test_and_change_bit(int nr, volatile void * addr)
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{
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__u32 mask, oldbit;
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volatile __u32 *a = addr;
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a += (nr >> 5);
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mask = (1 << (nr & 0x1F));
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oldbit = (*a & mask);
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*a ^= mask;
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return (oldbit != 0);
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}
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/**
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/**
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* test_and_change_bit - Change a bit and return its old value
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* test_and_change_bit - Change a bit and return its old value
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* @nr: Bit to set
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* @nr: Bit to set
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@ -350,353 +244,26 @@ static __inline__ int test_and_change_bit(int nr, volatile void * addr)
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return (oldbit != 0);
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return (oldbit != 0);
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}
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}
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/**
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#include <asm-generic/bitops/non-atomic.h>
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* test_bit - Determine whether a bit is set
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#include <asm-generic/bitops/ffz.h>
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* @nr: bit number to test
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#include <asm-generic/bitops/__ffs.h>
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* @addr: Address to start counting from
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#include <asm-generic/bitops/fls.h>
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*/
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#include <asm-generic/bitops/fls64.h>
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static __inline__ int test_bit(int nr, const volatile void * addr)
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{
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__u32 mask;
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const volatile __u32 *a = addr;
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a += (nr >> 5);
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mask = (1 << (nr & 0x1F));
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return ((*a & mask) != 0);
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}
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/**
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* ffz - find first zero in word.
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* @word: The word to search
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*
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* Undefined if no zero exists, so code should check against ~0UL first.
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*/
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static __inline__ unsigned long ffz(unsigned long word)
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{
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int k;
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word = ~word;
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k = 0;
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if (!(word & 0x0000ffff)) { k += 16; word >>= 16; }
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if (!(word & 0x000000ff)) { k += 8; word >>= 8; }
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if (!(word & 0x0000000f)) { k += 4; word >>= 4; }
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if (!(word & 0x00000003)) { k += 2; word >>= 2; }
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if (!(word & 0x00000001)) { k += 1; }
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return k;
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}
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/**
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* find_first_zero_bit - find the first zero bit in a memory region
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* @addr: The address to start the search at
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* @size: The maximum size to search
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*
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* Returns the bit-number of the first zero bit, not the number of the byte
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* containing a bit.
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*/
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#define find_first_zero_bit(addr, size) \
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find_next_zero_bit((addr), (size), 0)
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/**
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* find_next_zero_bit - find the first zero bit in a memory region
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* @addr: The address to base the search on
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* @offset: The bitnumber to start searching at
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* @size: The maximum size to search
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*/
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static __inline__ int find_next_zero_bit(const unsigned long *addr,
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int size, int offset)
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{
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const unsigned long *p = addr + (offset >> 5);
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unsigned long result = offset & ~31UL;
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unsigned long tmp;
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if (offset >= size)
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return size;
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size -= result;
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offset &= 31UL;
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if (offset) {
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tmp = *(p++);
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tmp |= ~0UL >> (32-offset);
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if (size < 32)
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goto found_first;
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if (~tmp)
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goto found_middle;
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size -= 32;
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result += 32;
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}
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while (size & ~31UL) {
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if (~(tmp = *(p++)))
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goto found_middle;
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result += 32;
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size -= 32;
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}
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if (!size)
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return result;
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tmp = *p;
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found_first:
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tmp |= ~0UL << size;
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found_middle:
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return result + ffz(tmp);
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}
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/**
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* __ffs - find first bit in word.
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* @word: The word to search
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*
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* Undefined if no bit exists, so code should check against 0 first.
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*/
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static __inline__ unsigned long __ffs(unsigned long word)
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{
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int k = 0;
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if (!(word & 0x0000ffff)) { k += 16; word >>= 16; }
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if (!(word & 0x000000ff)) { k += 8; word >>= 8; }
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if (!(word & 0x0000000f)) { k += 4; word >>= 4; }
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if (!(word & 0x00000003)) { k += 2; word >>= 2; }
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if (!(word & 0x00000001)) { k += 1;}
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return k;
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}
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/*
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* fls: find last bit set.
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*/
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#define fls(x) generic_fls(x)
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#define fls64(x) generic_fls64(x)
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#ifdef __KERNEL__
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#ifdef __KERNEL__
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/*
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#include <asm-generic/bitops/sched.h>
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* Every architecture must define this function. It's the fastest
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#include <asm-generic/bitops/find.h>
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* way of searching a 140-bit bitmap where the first 100 bits are
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#include <asm-generic/bitops/ffs.h>
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* unlikely to be set. It's guaranteed that at least one of the 140
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#include <asm-generic/bitops/hweight.h>
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* bits is cleared.
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*/
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static inline int sched_find_first_bit(unsigned long *b)
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{
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if (unlikely(b[0]))
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return __ffs(b[0]);
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if (unlikely(b[1]))
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return __ffs(b[1]) + 32;
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if (unlikely(b[2]))
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return __ffs(b[2]) + 64;
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if (b[3])
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return __ffs(b[3]) + 96;
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return __ffs(b[4]) + 128;
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}
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/**
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* find_next_bit - find the first set bit in a memory region
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* @addr: The address to base the search on
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* @offset: The bitnumber to start searching at
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* @size: The maximum size to search
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*/
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static inline unsigned long find_next_bit(const unsigned long *addr,
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unsigned long size, unsigned long offset)
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{
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unsigned int *p = ((unsigned int *) addr) + (offset >> 5);
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unsigned int result = offset & ~31UL;
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unsigned int tmp;
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if (offset >= size)
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return size;
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size -= result;
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offset &= 31UL;
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if (offset) {
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tmp = *p++;
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tmp &= ~0UL << offset;
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if (size < 32)
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goto found_first;
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if (tmp)
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goto found_middle;
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size -= 32;
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result += 32;
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}
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while (size >= 32) {
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if ((tmp = *p++) != 0)
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goto found_middle;
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result += 32;
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size -= 32;
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}
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if (!size)
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return result;
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tmp = *p;
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found_first:
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tmp &= ~0UL >> (32 - size);
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if (tmp == 0UL) /* Are any bits set? */
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return result + size; /* Nope. */
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found_middle:
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return result + __ffs(tmp);
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}
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/**
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* find_first_bit - find the first set bit in a memory region
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* @addr: The address to start the search at
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* @size: The maximum size to search
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*
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* Returns the bit-number of the first set bit, not the number of the byte
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* containing a bit.
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*/
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#define find_first_bit(addr, size) \
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find_next_bit((addr), (size), 0)
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/**
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* ffs - find first bit set
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* @x: the word to search
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*
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* This is defined the same way as
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* the libc and compiler builtin ffs routines, therefore
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* differs in spirit from the above ffz (man ffs).
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*/
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#define ffs(x) generic_ffs(x)
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/**
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* hweightN - returns the hamming weight of a N-bit word
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* @x: the word to weigh
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*
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* The Hamming Weight of a number is the total number of bits set in it.
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*/
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#define hweight32(x) generic_hweight32(x)
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#define hweight16(x) generic_hweight16(x)
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#define hweight8(x) generic_hweight8(x)
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#endif /* __KERNEL__ */
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#endif /* __KERNEL__ */
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#ifdef __KERNEL__
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#ifdef __KERNEL__
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/*
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#include <asm-generic/bitops/ext2-non-atomic.h>
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||||||
* ext2_XXXX function
|
#include <asm-generic/bitops/ext2-atomic.h>
|
||||||
* orig: include/asm-sh/bitops.h
|
#include <asm-generic/bitops/minix.h>
|
||||||
*/
|
|
||||||
|
|
||||||
#ifdef __LITTLE_ENDIAN__
|
|
||||||
#define ext2_set_bit __test_and_set_bit
|
|
||||||
#define ext2_clear_bit __test_and_clear_bit
|
|
||||||
#define ext2_test_bit test_bit
|
|
||||||
#define ext2_find_first_zero_bit find_first_zero_bit
|
|
||||||
#define ext2_find_next_zero_bit find_next_zero_bit
|
|
||||||
#else
|
|
||||||
static inline int ext2_set_bit(int nr, volatile void * addr)
|
|
||||||
{
|
|
||||||
__u8 mask, oldbit;
|
|
||||||
volatile __u8 *a = addr;
|
|
||||||
|
|
||||||
a += (nr >> 3);
|
|
||||||
mask = (1 << (nr & 0x07));
|
|
||||||
oldbit = (*a & mask);
|
|
||||||
*a |= mask;
|
|
||||||
|
|
||||||
return (oldbit != 0);
|
|
||||||
}
|
|
||||||
|
|
||||||
static inline int ext2_clear_bit(int nr, volatile void * addr)
|
|
||||||
{
|
|
||||||
__u8 mask, oldbit;
|
|
||||||
volatile __u8 *a = addr;
|
|
||||||
|
|
||||||
a += (nr >> 3);
|
|
||||||
mask = (1 << (nr & 0x07));
|
|
||||||
oldbit = (*a & mask);
|
|
||||||
*a &= ~mask;
|
|
||||||
|
|
||||||
return (oldbit != 0);
|
|
||||||
}
|
|
||||||
|
|
||||||
static inline int ext2_test_bit(int nr, const volatile void * addr)
|
|
||||||
{
|
|
||||||
__u32 mask;
|
|
||||||
const volatile __u8 *a = addr;
|
|
||||||
|
|
||||||
a += (nr >> 3);
|
|
||||||
mask = (1 << (nr & 0x07));
|
|
||||||
|
|
||||||
return ((mask & *a) != 0);
|
|
||||||
}
|
|
||||||
|
|
||||||
#define ext2_find_first_zero_bit(addr, size) \
|
|
||||||
ext2_find_next_zero_bit((addr), (size), 0)
|
|
||||||
|
|
||||||
static inline unsigned long ext2_find_next_zero_bit(void *addr,
|
|
||||||
unsigned long size, unsigned long offset)
|
|
||||||
{
|
|
||||||
unsigned long *p = ((unsigned long *) addr) + (offset >> 5);
|
|
||||||
unsigned long result = offset & ~31UL;
|
|
||||||
unsigned long tmp;
|
|
||||||
|
|
||||||
if (offset >= size)
|
|
||||||
return size;
|
|
||||||
size -= result;
|
|
||||||
offset &= 31UL;
|
|
||||||
if(offset) {
|
|
||||||
/* We hold the little endian value in tmp, but then the
|
|
||||||
* shift is illegal. So we could keep a big endian value
|
|
||||||
* in tmp, like this:
|
|
||||||
*
|
|
||||||
* tmp = __swab32(*(p++));
|
|
||||||
* tmp |= ~0UL >> (32-offset);
|
|
||||||
*
|
|
||||||
* but this would decrease preformance, so we change the
|
|
||||||
* shift:
|
|
||||||
*/
|
|
||||||
tmp = *(p++);
|
|
||||||
tmp |= __swab32(~0UL >> (32-offset));
|
|
||||||
if(size < 32)
|
|
||||||
goto found_first;
|
|
||||||
if(~tmp)
|
|
||||||
goto found_middle;
|
|
||||||
size -= 32;
|
|
||||||
result += 32;
|
|
||||||
}
|
|
||||||
while(size & ~31UL) {
|
|
||||||
if(~(tmp = *(p++)))
|
|
||||||
goto found_middle;
|
|
||||||
result += 32;
|
|
||||||
size -= 32;
|
|
||||||
}
|
|
||||||
if(!size)
|
|
||||||
return result;
|
|
||||||
tmp = *p;
|
|
||||||
|
|
||||||
found_first:
|
|
||||||
/* tmp is little endian, so we would have to swab the shift,
|
|
||||||
* see above. But then we have to swab tmp below for ffz, so
|
|
||||||
* we might as well do this here.
|
|
||||||
*/
|
|
||||||
return result + ffz(__swab32(tmp) | (~0UL << size));
|
|
||||||
found_middle:
|
|
||||||
return result + ffz(__swab32(tmp));
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#define ext2_set_bit_atomic(lock, nr, addr) \
|
|
||||||
({ \
|
|
||||||
int ret; \
|
|
||||||
spin_lock(lock); \
|
|
||||||
ret = ext2_set_bit((nr), (addr)); \
|
|
||||||
spin_unlock(lock); \
|
|
||||||
ret; \
|
|
||||||
})
|
|
||||||
|
|
||||||
#define ext2_clear_bit_atomic(lock, nr, addr) \
|
|
||||||
({ \
|
|
||||||
int ret; \
|
|
||||||
spin_lock(lock); \
|
|
||||||
ret = ext2_clear_bit((nr), (addr)); \
|
|
||||||
spin_unlock(lock); \
|
|
||||||
ret; \
|
|
||||||
})
|
|
||||||
|
|
||||||
/* Bitmap functions for the minix filesystem. */
|
|
||||||
#define minix_test_and_set_bit(nr,addr) __test_and_set_bit(nr,addr)
|
|
||||||
#define minix_set_bit(nr,addr) __set_bit(nr,addr)
|
|
||||||
#define minix_test_and_clear_bit(nr,addr) __test_and_clear_bit(nr,addr)
|
|
||||||
#define minix_test_bit(nr,addr) test_bit(nr,addr)
|
|
||||||
#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)
|
|
||||||
|
|
||||||
#endif /* __KERNEL__ */
|
#endif /* __KERNEL__ */
|
||||||
|
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue