Messages in this thread | | | Date | Wed, 04 Feb 2015 23:13:28 +0300 | From | Sergei Shtylyov <> | Subject | Re: [PATCH v2] net: bluetooth: hci_sock: Use 'const void *' instead of 'void *' for 2nd parameter of hci_test_bit() |
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Hello.
On 02/04/2015 02:59 PM, David Laight wrote:
>> -static inline int hci_test_bit(int nr, void *addr) >> +static inline int hci_test_bit(int nr, const void *addr) >> { >> return *((__u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31)); >> }
> Is there a 'standard' function lurking that will do the above. > On x86 the cpus 'bit test' instruction will handle bit numbers > greater than the word size - so it can be a single instruction.
Of course, there's test_bit().
> David
WBR, Sergei
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