Messages in this thread | | | From | David Laight <> | Subject | RE: [PATCH v2] net: bluetooth: hci_sock: Use 'const void *' instead of 'void *' for 2nd parameter of hci_test_bit() | Date | Wed, 4 Feb 2015 11:59:39 +0000 |
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From: Chen Gang S > -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.
David
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