flush_dcache_page from user space.

[ratheesh kannoth]

I  mmap'ed  mmory allocated by  kmalloc , to userspace.  I can modify
data ( in that memory region )  from  kernel space or userspace  and
call flush_dcache_page to get it refected  in both kernel and
userspace.

1)  if i modify a value from userspace,  is there any other way to
flush dcache page from userspace. What i am looking is to avoid
context switch ( to get into kernel  only to call   flush_dcache_page
) ?


Thanks,
Ratheesh