scripts/kallsyms: filter symbols not in kernel address space
This patch uses CONFIG_PAGE_OFFSET to filter symbols which
are not in kernel address space because these symbols are
generally for generating code purpose and can't be run at
kernel mode, so we needn't keep them in /proc/kallsyms.

For example, on ARM there are some symbols which may be
linked in relocatable code section, then perf can't parse
symbols any more from /proc/kallsyms, this patch fixes the
problem (introduced b9b32bf)

Change-Id: I3d6321b7d87727c7c2802b3924f2e89a28e4b9ca
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@vger.kernel.org
Git-commit: f6537f2
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
CRs-fixed: 583755
[nleeder@codeaurora.org: move flag to Makefile because original file
 scripts/link-vmlinux.sh does not exist in 3.4]
Signed-off-by: Neil Leeder <nleeder@codeaurora.org>
Signed-off-by: Mekala Natarajan <mekalan@codeaurora.org>