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ARC: kernel stack: INIT_THREAD need not setup @init_stack in @ksp
There are 2 pointers to kernel mode stack of a task - task_struct.stack: base address of stack page (max possible stack top) - thread_info.ksp : runtime stack top in __switch_to INIT_THREAD was setting up ksp to stack base which was not really needed - it would get overwritten with dynamic value on first call to __switch_to when init is switched out for the very first time. - generic code already does init_task.stack = init_stack and ARC code uses that to retrieve task's stack base. Signed-off-by: Vineet Gupta <vgupta@kernel.org>
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1 changed files with 1 additions and 3 deletions
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@ -33,9 +33,7 @@ struct thread_struct {
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#endif
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};
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#define INIT_THREAD { \
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.ksp = sizeof(init_stack) + (unsigned long) init_stack, \
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}
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#define INIT_THREAD { }
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/* Forward declaration, a strange C thing */
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struct task_struct;
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