[Linux-ia64] do_mmap_fake question

[Manfred Spraul <manfred@colorfullife.com>]

do_mmap_fake seems to be buggy:

You use simple memset/memcpy to initialize user memory.
AFAICS this can oops on SMP: one thread calls do_mmap_fake, and a second
thread calls sys_munmap() for that memory range.
memset/memcpy will fail, and you don't have an exception handler
installed.

Btw, why do you use llseek?
Is there a hidden problem with read(,,,&off)?

- llseek(,,off);
- r = file->f_op->read(file,(char*)addr, len, &file->f_pos);
+ r = file->f_op->read(file,(char*)addr, len, &off);

--
	Manfred