[PATCH v4 1/3] x86: kallsyms: disable absolute percpu symbols on !SMP
From: Ard Biesheuvel <hidden>
Date: 2016-01-25 14:20:48
Also in:
linux-s390, linuxppc-dev, lkml
Subsystem:
kernel build + files below scripts/ (unless maintained elsewhere), the rest · Maintainers:
Nathan Chancellor, Nicolas Schier, Linus Torvalds
scripts/kallsyms.c has a special --absolute-percpu command line option which deals with the zero based per cpu offsets that are used when building for SMP on x86_64. This means that the option should only be passed in that case, so add a check for CONFIG_SMP. Otherwise, per cpu variables are recorded as absolute quantities, (which they are not under !CONFIG_SMP) and they are not relocated under CONFIG_RELOCATABLE=y. Signed-off-by: Ard Biesheuvel <redacted> --- scripts/link-vmlinux.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index ba6c34ea5429..b541c21072f2 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh@@ -86,7 +86,7 @@ kallsyms() kallsymopt="${kallsymopt} --page-offset=$CONFIG_PAGE_OFFSET" fi - if [ -n "${CONFIG_X86_64}" ]; then + if [ -n "${CONFIG_X86_64}" ] && [ -n "${CONFIG_SMP}" ]; then kallsymopt="${kallsymopt} --absolute-percpu" fi
--
2.5.0