From 14c3f8558717adb192c364f58b0d63dfc850ecca Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Fri, 3 Feb 2006 21:51:56 +0100 Subject: [PATCH] x86_64: Let impossible CPUs point to reference per cpu data Hack for 2.6.16. In 2.6.17 all code that uses NR_CPUs should be audited and changed to only touch possible CPUs. Don't mark the reference per cpu data init data (so it stays around after boot) and point all impossible CPUs to it. This way they reference some valid - although shared memory. Usually this is only initialization like INIT_LIST_HEADs and there won't be races because these CPUs never run. Still somewhat hackish. Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds --- arch/x86_64/kernel/vmlinux.lds.S | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/x86_64/kernel/vmlinux.lds.S b/arch/x86_64/kernel/vmlinux.lds.S index 59316d1c1d8..74db0062d4a 100644 --- a/arch/x86_64/kernel/vmlinux.lds.S +++ b/arch/x86_64/kernel/vmlinux.lds.S @@ -172,13 +172,15 @@ SECTIONS . = ALIGN(4096); __initramfs_start = .; .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) } - __initramfs_end = .; + __initramfs_end = .; + /* temporary here to work around NR_CPUS. If you see this comment in 2.6.17+ + complain */ + . = ALIGN(4096); + __init_end = .; . = ALIGN(CONFIG_X86_L1_CACHE_BYTES); __per_cpu_start = .; .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { *(.data.percpu) } __per_cpu_end = .; - . = ALIGN(4096); - __init_end = .; . = ALIGN(4096); __nosave_begin = .; -- cgit v1.2.3