On 20/12/12 17:09, H Hartley Sweeten wrote:
Hello all,I have a question... In the comedi core, the asynchronous 'prealloc_buf' is vmap'ed after the page list has been allocated. The code in question looks like this: async->prealloc_buf = #ifdef PAGE_KERNEL_NOCACHE vmap(pages, n_pages, VM_MAP, PAGE_KERNEL_NOCACHE); #else vmap(pages, n_pages, VM_MAP, PAGE_KERNEL); #endif Is the #ifdef something left over from an older kernel? Isn't PAGE_KERNEL_NOCACHE always defined?
Unfortunately not; it's arch dependent. Neither ARM nor PowerPC define it, for example.
-- -=( Ian Abbott @ MEV Ltd. E-mail: <[email protected]> )=- -=( Tel: +44 (0)161 477 1898 FAX: +44 (0)161 718 3587 )=- _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
