korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-18 17:54:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

x86: use wait_for_init_deassert in x86_64

Browse Source 
wraps the busy loop for wait_for_init_deasserted() in a function,
so smp_callin in x86_64 looks like more i386

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Glauber Costa 2008-03-03 14:13:13 -03:00 committed by Ingo Molnar
parent 91718e8d13
commit e90009bcc1
1 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/x86/kernel/smpboot_64.c
View File

@ -100,6 +100,13 @@ static void __cpuinit smp_store_cpu_info(int id)
print_cpu_info(c); print_cpu_info(c);
} }
static inline void wait_for_init_deassert(atomic_t *deassert)
{
while (!atomic_read(deassert))
cpu_relax();
return;
}
static atomic_t init_deasserted __cpuinitdata; static atomic_t init_deasserted __cpuinitdata;
/* /*
@ -117,8 +124,7 @@ void __cpuinit smp_callin(void)
* our local APIC. We have to wait for the IPI or we'll * our local APIC. We have to wait for the IPI or we'll
* lock up on an APIC access. * lock up on an APIC access.
*/ */
while (!atomic_read(&init_deasserted)) wait_for_init_deassert(&init_deasserted);
cpu_relax();
/* /*
* (This works even if the APIC is not enabled.) * (This works even if the APIC is not enabled.)