Fix smp cpu detect on gcc 4.5.

Bruce Rogers <brogers@novell.com> observed new compiler optimizing
away memory assign in smp detect.  Add barrier() to code to ensure gcc
knows the SIPI can read/write memory.
1 file changed
tree: 7fca01be57a51d1eef14cda0be94c0c094d7e6b0
  1. .gitignore
  2. COPYING
  3. COPYING.LESSER
  4. Makefile
  5. README
  6. TODO
  7. src/
  8. tools/
  9. vgasrc/