Merge commit 'v2.6.30-rc6' into perfcounters/core

Merge reason: this branch was on an -rc4 base, merge it up to -rc6
              to get the latest upstream fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --cc MAINTAINERS
Simple merge

diff --cc arch/x86/kernel/cpu/common.c
Simple merge

diff --cc drivers/char/sysrq.c
Simple merge

diff --cc fs/exec.c
Simple merge

diff --cc include/linux/syscalls.h
Simple merge

diff --cc kernel/sched.c
Simple merge

diff --cc kernel/sysctl.c
Simple merge

diff --cc mm/mmap.c
Simple merge