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authorAndi Kleen <ak@suse.de>2006-02-03 21:51:56 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-04 16:43:15 -0800
commit14c3f8558717adb192c364f58b0d63dfc850ecca (patch)
tree16e04e07d4212217e597d79432ad03c2b3856855 /arch
parent3777a95903953c55f2309a89679b73c19ae5535b (diff)
[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 <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86_64/kernel/vmlinux.lds.S8
1 files 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 = .;