Jeff Dike 536788fe2d uml: runtime host VMSPLIT detection ... Calculate TASK_SIZE at run-time by figuring out the host's VMSPLIT - this is needed on i386 if UML is to run on hosts with varying VMSPLITs without recompilation. TASK_SIZE is now defined in terms of a variable, task_size. This gets rid of an include of pgtable.h from processor.h, which can cause include loops. On i386, task_size is calculated early in boot by probing the address space in a binary search to figure out where the boundary between usable and non-usable memory is. This tries to make sure that a page that is considered to be in userspace is, or can be made, read-write. I'm concerned about a system-global VDSO page in kernel memory being hit and considered to be a userspace page. On x86_64, task_size is just the old value of CONFIG_TOP_ADDR. A bunch of config variable are gone now. CONFIG_TOP_ADDR is directly replaced by TASK_SIZE. NEST_LEVEL is gone since the relocation of the stubs makes it irrelevant. All the HOST_VMSPLIT stuff is gone. All references to these in arch/um/Makefile are also gone. I noticed and fixed a missing extern in os.h when adding os_get_task_size. Note: This has been revised to fix the 32-bit UML on 64-bit host bug that Miklos ran into. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-02-08 09:22:42 -08:00
..
skas
asm-offsets.c
config.c.in
dyn.lds.S
exec.c
exitcode.c
gmon_syms.c
gprof_syms.c
init_task.c
initrd.c
irq.c
ksyms.c
Makefile
mem.c
physmem.c
process.c
ptrace.c
reboot.c
sigio.c
signal.c
smp.c
syscall.c
sysrq.c
time.c
tlb.c
trap.c
uaccess.c
um_arch.c
umid.c
uml.lds.S
vmlinux.lds.S