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add memory barriers to seralize load and store operations

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=> required to clone a task
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Stefan Lankes 2012-07-16 23:05:46 +02:00
parent 837bc3ebe1
commit 6013c2ec4d
1 changed files with 2 additions and 0 deletions
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arch/x86/kernel/gdt.c
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@ -67,7 +67,9 @@ int arch_fork(task_t* task)
id = task->id; id = task->id;
// copy kernel stack of the current task // copy kernel stack of the current task
mb();
memcpy(kstacks[id], kstacks[curr_task->id], KERNEL_STACK_SIZE); memcpy(kstacks[id], kstacks[curr_task->id], KERNEL_STACK_SIZE);
mb();
#ifdef CONFIG_X86_32 #ifdef CONFIG_X86_32
asm volatile ("mov %%esp, %0" : "=r"(esp)); asm volatile ("mov %%esp, %0" : "=r"(esp));