Commit 208151bf authored by Helge Deller's avatar Helge Deller
Browse files

parisc: Convert to BIT_MASK() and BIT_WORD() 



Drop own open-coded implementation to set bits and use the kernel
provided BIT_MASK() and BIT_WORD() macros.

Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent ba47d845

arch/parisc/include/asm/bitops.h

+13 −28
Original line number Diff line number Diff line
@@ -12,21 +12,6 @@ 
#include <asm/barrier.h>

#include <linux/atomic.h>



/*

 * HP-PARISC specific bit operations

 * for a detailed description of the functions please refer

 * to include/asm-i386/bitops.h or kerneldoc

 */



#if __BITS_PER_LONG == 64

#define SHIFT_PER_LONG 6

#else

#define SHIFT_PER_LONG 5

#endif



#define CHOP_SHIFTCOUNT(x) (((unsigned long) (x)) & (BITS_PER_LONG - 1))





/* See http://marc.theaimsgroup.com/?t=108826637900003 for discussion

 * on use of volatile and __*_bit() (set/clear/change):

 *	*_bit() want use of volatile.
@@ -35,10 +20,10 @@ 


static __inline__ void set_bit(int nr, volatile unsigned long * addr)

{

	unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);

	unsigned long mask = BIT_MASK(nr);

	unsigned long flags;



	addr += (nr >> SHIFT_PER_LONG);

	addr += BIT_WORD(nr);

	_atomic_spin_lock_irqsave(addr, flags);

	*addr |= mask;

	_atomic_spin_unlock_irqrestore(addr, flags);
@@ -46,21 +31,21 @@ static __inline__ void set_bit(int nr, volatile unsigned long * addr) 


static __inline__ void clear_bit(int nr, volatile unsigned long * addr)

{

	unsigned long mask = ~(1UL << CHOP_SHIFTCOUNT(nr));

	unsigned long mask = BIT_MASK(nr);

	unsigned long flags;



	addr += (nr >> SHIFT_PER_LONG);

	addr += BIT_WORD(nr);

	_atomic_spin_lock_irqsave(addr, flags);

	*addr &= mask;

	*addr &= ~mask;

	_atomic_spin_unlock_irqrestore(addr, flags);

}



static __inline__ void change_bit(int nr, volatile unsigned long * addr)

{

	unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);

	unsigned long mask = BIT_MASK(nr);

	unsigned long flags;



	addr += (nr >> SHIFT_PER_LONG);

	addr += BIT_WORD(nr);

	_atomic_spin_lock_irqsave(addr, flags);

	*addr ^= mask;

	_atomic_spin_unlock_irqrestore(addr, flags);
@@ -68,12 +53,12 @@ static __inline__ void change_bit(int nr, volatile unsigned long * addr) 


static __inline__ int test_and_set_bit(int nr, volatile unsigned long * addr)

{

	unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);

	unsigned long mask = BIT_MASK(nr);

	unsigned long old;

	unsigned long flags;

	int set;



	addr += (nr >> SHIFT_PER_LONG);

	addr += BIT_WORD(nr);

	_atomic_spin_lock_irqsave(addr, flags);

	old = *addr;

	set = (old & mask) ? 1 : 0;
@@ -86,12 +71,12 @@ static __inline__ int test_and_set_bit(int nr, volatile unsigned long * addr) 


static __inline__ int test_and_clear_bit(int nr, volatile unsigned long * addr)

{

	unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);

	unsigned long mask = BIT_MASK(nr);

	unsigned long old;

	unsigned long flags;

	int set;



	addr += (nr >> SHIFT_PER_LONG);

	addr += BIT_WORD(nr);

	_atomic_spin_lock_irqsave(addr, flags);

	old = *addr;

	set = (old & mask) ? 1 : 0;
@@ -104,11 +89,11 @@ static __inline__ int test_and_clear_bit(int nr, volatile unsigned long * addr) 


static __inline__ int test_and_change_bit(int nr, volatile unsigned long * addr)

{

	unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);

	unsigned long mask = BIT_MASK(nr);

	unsigned long oldbit;

	unsigned long flags;



	addr += (nr >> SHIFT_PER_LONG);

	addr += BIT_WORD(nr);

	_atomic_spin_lock_irqsave(addr, flags);

	oldbit = *addr;

	*addr = oldbit ^ mask;

arch/parisc/mm/init.c

+6 −6
Original line number Diff line number Diff line
@@ -750,7 +750,7 @@ unsigned long alloc_sid(void) 
	free_space_ids--;



	index = find_next_zero_bit(space_id, NR_SPACE_IDS, space_id_index);

	space_id[index >> SHIFT_PER_LONG] |= (1L << (index & (BITS_PER_LONG - 1)));

	space_id[BIT_WORD(index)] |= BIT_MASK(index);

	space_id_index = index;



	spin_unlock(&sid_lock);
@@ -761,16 +761,16 @@ unsigned long alloc_sid(void) 
void free_sid(unsigned long spaceid)

{

	unsigned long index = spaceid >> SPACEID_SHIFT;

	unsigned long *dirty_space_offset;

	unsigned long *dirty_space_offset, mask;



	dirty_space_offset = dirty_space_id + (index >> SHIFT_PER_LONG);

	index &= (BITS_PER_LONG - 1);

	dirty_space_offset = &dirty_space_id[BIT_WORD(index)];

	mask = BIT_MASK(index);



	spin_lock(&sid_lock);



	BUG_ON(*dirty_space_offset & (1L << index)); /* attempt to free space id twice */

	BUG_ON(*dirty_space_offset & mask); /* attempt to free space id twice */



	*dirty_space_offset |= (1L << index);

	*dirty_space_offset |= mask;

	dirty_space_ids++;



	spin_unlock(&sid_lock);

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