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authorShaohua Li <shaohua.li@intel.com>2006-06-27 02:53:43 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-27 17:32:37 -0700
commitbd9e0b74f52dbac6241643fadca2393808b14c7a (patch)
treeaf2c479782edbeca009cf195401d82abb61b1ac7 /arch/i386/kernel/cpu/common.c
parent28eba5bf9d4bf3ba4d58d985abf3a2903b7f2125 (diff)
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[PATCH] x86: cpu_init(): avoid GFP_KERNEL allocation while atomic
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>
Diffstat (limited to 'arch/i386/kernel/cpu/common.c')
-rw-r--r--arch/i386/kernel/cpu/common.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c
index 44f2c5f..640364d 100644
--- a/arch/i386/kernel/cpu/common.c
+++ b/arch/i386/kernel/cpu/common.c
@@ -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: