9 Aug
2007
9 Aug
'07
4:24 a.m.
Ralf Baechle wrote:
On Tue, Aug 07, 2007 at 11:01:57PM +0900, Atsushi Nemoto wrote:
On Tue, 7 Aug 2007 10:18:04 +0400, "Dajie Tan" jiankemeng@gmail.com wrote:
static inline unsigned long virt_to_phys(volatile const void *address) {
return (unsigned long)address - PAGE_OFFSET + PHYS_OFFSET;
return ((unsigned long)address & 0x1fffffff) + PHYS_OFFSET;}
This makes virt_to_phys() a bit slower, and more importantly, breaks 64-bit kernel.
It's ALSA that is doing funny things here so there is no point in fixing the arch code to work for ALSA.
Ralf
arm has made a dma_mmap_coherent, but I don't quite understand the code and I am not sure the situation is the same.
Tian