linux/arch/mn10300/lib/bitops.c
Justin Chen e4acfcac0f bitops: Change the bitmap index from int to unsigned long [mn10300]
Change the index to unsigned long in all bitops for [mn10300]

Signed-off-by: Justin Chen <justin.chen@hp.com>
Reviewed-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: David Howells <dhowells@redhat.com>
2010-10-27 17:28:34 +01:00

51 lines
1.1 KiB
C

/* MN10300 Non-trivial bit operations
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#include <linux/module.h>
#include <asm/bitops.h>
#include <asm/system.h>
/*
* try flipping a bit using BSET and BCLR
*/
void change_bit(unsigned long nr, volatile void *addr)
{
if (test_bit(nr, addr))
goto try_clear_bit;
try_set_bit:
if (!test_and_set_bit(nr, addr))
return;
try_clear_bit:
if (test_and_clear_bit(nr, addr))
return;
goto try_set_bit;
}
/*
* try flipping a bit using BSET and BCLR and returning the old value
*/
int test_and_change_bit(unsigned long nr, volatile void *addr)
{
if (test_bit(nr, addr))
goto try_clear_bit;
try_set_bit:
if (!test_and_set_bit(nr, addr))
return 0;
try_clear_bit:
if (test_and_clear_bit(nr, addr))
return 1;
goto try_set_bit;
}