Eugene Kuznetsov wrote: > >> Next question is, why mmap() is failing? I tried to add a couple > >> of printk()'s to find out what happens, and this looks quite weird > >> for me. One of the first sanity checks in bttv_mmap() ( sources of > >> 0.8.16 ) fails. It is: > >> > >> if (!(vma->vm_flags & VM_SHARED)) > >> return -EINVAL; > >> > >> But, if I correctly understood what happens during the mmap() syscall > >> ( /usr/src/linux/mm/mmap.c ), VM_SHARED flag is not set for mapping > >> areas read-only! I tried to change protection in parameters to > >> mmap(), but only to receive 'permission denied' instead of 'invalid > >> argument', even as root. > > JS> Umm.. Try the attached patch - this may work... > > As I already mentioned, applying this change does not help, because > then I receive 'permission denied'. Now that is strange... The patched mmap command is now identical to that used in xawtv! Has anybody else gotten this to work with bttv 0.8.16? If so, please let us know how! -justin
