xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

x86: use static _cpu_pda array

Browse Source 
_cpu_pda array first uses statically allocated storage in data.init
and then switches to allocated bootmem to conserve space.  However,
after folding pda area into percpu area, _cpu_pda array will be
removed completely.  Drop the reallocation part to simplify the code
for soon-to-follow changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Tejun Heo
2009-01-13 20:41:35 +09:00
committed by Ingo Molnar
parent f32ff5388d
commit c8f3329a0d
4 changed files with 6 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
arch/x86/kernel/head64.c
View File

@@ -29,20 +29,8 @@
/* boot cpu pda, referenced by head_64.S to initialize %gs for boot CPU */
struct x8664_pda _boot_cpu_pda;
#ifdef CONFIG_SMP
/*
* We install an empty cpu_pda pointer table to indicate to early users
* (numa_set_node) that the cpu_pda pointer table for cpus other than
* the boot cpu is not yet setup.
*/
static struct x8664_pda *__cpu_pda[NR_CPUS] __initdata;
#else
static struct x8664_pda *__cpu_pda[NR_CPUS] __read_mostly;
#endif
void __init x86_64_init_pda(void)
{
_cpu_pda = __cpu_pda;
cpu_pda(0) = &_boot_cpu_pda;
cpu_pda(0)->data_offset =
(unsigned long)(__per_cpu_load - __per_cpu_start);