Re: [alsa-devel] [PATCH 2/2] sis7019: add support for pre-2.6 kernels

Dave Dillow wrote:

The sis7019 driver uses __ffs(), which is available in 2.6 kernels, but not in most earlier ones. This patches the driver to use a local version assembly version, as the hardware is SiS 55x only (i486/Pentium-ish).

++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) ++static inline unsigned long sis_ffs(unsigned long word) ++{ ++ __asm__("bsfl %1,%0" ++ :"=r" (word) ++ :"rm" (word)); ++ return word; ++} ++#endif

This should go into alsa-driver/include/adriver.h.

Regards, Clemens