With cpu_gdt_descr having been converted to per-CPU data, the old object (in
head.S) no longer needs to reserve space for each CPU's instance.
With cpu_gdt_table not being used for CPU 0 anymore, it doesn't seem to need
page alignment (or if in fact there is a need for it to retain that alignment,
the whole object should go into .data.page_align).
Signed-Off-By: Jan Beulich <[email protected]>
--- /home/jbeulich/tmp/linux-2.6.16-rc5/arch/i386/kernel/head.S 2006-02-28 08:38:38.000000000 +0100
+++ 2.6.16-rc5-i386-cpu_gdt_descr-cleanup/arch/i386/kernel/head.S 2006-01-25 11:15:51.000000000 +0100
@@ -450,7 +450,6 @@ int_msg:
.globl boot_gdt_descr
.globl idt_descr
-.globl cpu_gdt_descr
ALIGN
# early boot GDT descriptor (must use 1:1 address mapping)
@@ -470,8 +469,6 @@ cpu_gdt_descr:
.word GDT_ENTRIES*8-1
.long cpu_gdt_table
- .fill NR_CPUS-1,8,0 # space for the other GDT descriptors
-
/*
* The boot_gdt_table must mirror the equivalent in setup.S and is
* used only for booting.
@@ -485,7 +482,7 @@ ENTRY(boot_gdt_table)
/*
* The Global Descriptor Table contains 28 quadwords, per-CPU.
*/
- .align PAGE_SIZE_asm
+ .align L1_CACHE_BYTES
ENTRY(cpu_gdt_table)
.quad 0x0000000000000000 /* NULL descriptor */
.quad 0x0000000000000000 /* 0x0b reserved */
-
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