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

[PATCH] x86: cpu_init(): avoid GFP_KERNEL allocation while atomic

Browse Source 
The patch fixes two issues:

1.  cpu_init is called with interrupt disabled.  Allocating gdt table
   there isn't good at runtime.

2. gdt table page cause memory leak in CPU hotplug case.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Shaohua Li
2006-06-27 02:53:43 -07:00
committed by Linus Torvalds
parent 28eba5bf9d
commit bd9e0b74f5
2 changed files with 20 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
arch/i386/kernel/cpu/common.c
View File

@@ -613,6 +613,12 @@ void __cpuinit cpu_init(void)
set_in_cr4(X86_CR4_TSD);
}
/* The CPU hotplug case */
if (cpu_gdt_descr->address) {
gdt = (struct desc_struct *)cpu_gdt_descr->address;
memset(gdt, 0, PAGE_SIZE);
goto old_gdt;
}
/*
* This is a horrible hack to allocate the GDT. The problem
* is that cpu_init() is called really early for the boot CPU
@@ -631,7 +637,7 @@ void __cpuinit cpu_init(void)
local_irq_enable();
}
}
old_gdt:
/*
* Initialize the per-CPU GDT with the boot GDT,
* and set up the GDT descriptor: