diff options
Diffstat (limited to 'lib/include/nvif/os.h')
| -rw-r--r-- | lib/include/nvif/os.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/lib/include/nvif/os.h b/lib/include/nvif/os.h index 85c958881..fbde224ba 100644 --- a/lib/include/nvif/os.h +++ b/lib/include/nvif/os.h @@ -233,7 +233,7 @@ hweight32(u32 v) { #define BITMAP_BIT(b) ((b) % BITS_PER_LONG) static inline int -test_bit(int bit, volatile unsigned long *ptr) +test_bit(int bit, const volatile unsigned long *ptr) { return !!(ptr[BITMAP_POS(bit)] & (1UL << BITMAP_BIT(bit))); } @@ -285,6 +285,17 @@ __set_bit(long bit, volatile unsigned long *addr) } static inline long +find_next_bit(const volatile unsigned long *addr, int bits, int bit) +{ + while (bit < bits) { + if (test_bit(bit, addr)) + break; + bit++; + } + return bit; +} + +static inline long find_first_zero_bit(volatile unsigned long *addr, int bits) { int bit; @@ -310,6 +321,10 @@ bitmap_clear(unsigned long *addr, unsigned int pos, unsigned int bits) __clear_bit(pos++, addr); } +#define for_each_set_bit(bit, addr, size) \ + for ((bit) = find_next_bit((addr), (size), 0); (bit) < (size); \ + (bit) = find_next_bit((addr), (size), (bit) + 1)) + /****************************************************************************** * atomics *****************************************************************************/ |