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x86: remove static boot_cpu_pda array v2

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* Remove the boot_cpu_pda array and pointer table from the data section.
    Allocate the pointer table and array during init.  do_boot_cpu()
    will reallocate the pda in node local memory and if the cpu is being
    brought up before the bootmem array is released (after_bootmem = 0),
    then it will free the initial pda.  This will happen for all cpus
    present at system startup.

    This removes 512k + 32k bytes from the data section.

For inclusion into sched-devel/latest tree.

Based on:
	git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
    +   sched-devel/latest  .../mingo/linux-2.6-sched-devel.git

Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Mike Travis
2008-05-12 21:21:13 +02:00
committed by Ingo Molnar
parent 9f248bde9d
commit 3461b0af02
6 changed files with 135 additions and 38 deletions
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6
include/asm-x86/pda.h
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@@ -22,7 +22,8 @@ struct x8664_pda {
offset 40!!! */
#endif
char *irqstackptr;
int nodenumber; /* number of current node */
short nodenumber; /* number of current node (32k max) */
short in_bootmem; /* pda lives in bootmem */
unsigned int __softirq_pending;
unsigned int __nmi_count; /* number of NMI on this CPUs */
short mmu_state;
@@ -38,8 +39,7 @@ struct x8664_pda {
unsigned irq_spurious_count;
} ____cacheline_aligned_in_smp;
extern struct x8664_pda *_cpu_pda[];
extern struct x8664_pda boot_cpu_pda[];
extern struct x8664_pda **_cpu_pda;
extern void pda_init(int);
#define cpu_pda(i) (_cpu_pda[i])