| Message ID | 1326470004-10096-4-git-send-email-akinobu.mita@gmail.com |
|---|---|
| State | New, archived |
| Headers | show |
Hello. On 01/13/2012 06:53 PM, Akinobu Mita wrote: > Introduce list_for_each_clear_bit() and list_for_each_clear_bit_from(). It seems you've got somewhat muddled -- you're actually introducing for_each_clear_bit() and for_each_clear_bit_from() > They are similar to for_each_set_bit() and list_for_each_set_bit_from(), > but they iterate over all the cleared bits in a memory region. > Signed-off-by: Akinobu Mita<akinobu.mita@gmail.com> > Cc: Robert Richter<robert.richter@amd.com> > Cc: Thomas Gleixner<tglx@linutronix.de> > Cc: Ingo Molnar<mingo@redhat.com> > Cc: "H. Peter Anvin"<hpa@zytor.com> > Cc: x86@kernel.org > Cc: David Woodhouse<dwmw2@infradead.org> > Cc: linux-mtd@lists.infradead.org > Cc: Martin Schwidefsky<schwidefsky@de.ibm.com> > Cc: Heiko Carstens<heiko.carstens@de.ibm.com> > Cc: linux390@de.ibm.com > Cc: linux-s390@vger.kernel.org > Cc: linux-usb@vger.kernel.org WBR, Sergei
2012/1/14 Sergei Shtylyov <sshtylyov@mvista.com>: > Hello. > > On 01/13/2012 06:53 PM, Akinobu Mita wrote: > >> Introduce list_for_each_clear_bit() and list_for_each_clear_bit_from(). > > > It seems you've got somewhat muddled -- you're actually introducing > for_each_clear_bit() and for_each_clear_bit_from() Oops, thanks for a notification.
diff --git a/include/linux/bitops.h b/include/linux/bitops.h index 15ad702..c8a0d65 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -32,6 +32,17 @@ extern unsigned long __sw_hweight64(__u64 w); (bit) < (size); \ (bit) = find_next_bit((addr), (size), (bit) + 1)) +#define for_each_clear_bit(bit, addr, size) \ + for ((bit) = find_first_zero_bit((addr), (size)); \ + (bit) < (size); \ + (bit) = find_next_zero_bit((addr), (size), (bit) + 1)) + +/* same as for_each_clear_bit() but use bit as value to start with */ +#define for_each_clear_bit_from(bit, addr, size) \ + for ((bit) = find_next_zero_bit((addr), (size), (bit)); \ + (bit) < (size); \ + (bit) = find_next_zero_bit((addr), (size), (bit) + 1)) + static __inline__ int get_bitmask_order(unsigned int count) { int order;
Introduce list_for_each_clear_bit() and list_for_each_clear_bit_from(). They are similar to for_each_set_bit() and list_for_each_set_bit_from(), but they iterate over all the cleared bits in a memory region. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: David Woodhouse <dwmw2@infradead.org> Cc: linux-mtd@lists.infradead.org Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org Cc: linux-usb@vger.kernel.org --- include/linux/bitops.h | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-)