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Remove unused functions

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This commit is contained in:
Bahadir Balban
2008-10-24 13:55:51 +03:00
parent 651901d8b9
commit e875344149
2 changed files with 0 additions and 84 deletions
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63
src/api/thread.c
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@@ -166,69 +166,6 @@ int arch_setup_new_thread(struct ktcb *new, struct ktcb *orig, unsigned int flag
extern unsigned int return_from_syscall;
/*
* Copies the pre-syscall context of original thread into the kernel
* stack of new thread. Modifies new thread's context registers so that
* when it schedules it executes as if it is returning from a syscall,
* i.e. the syscall return path where the previous context copied to its
* stack is restored. It also modifies r0 to ensure POSIX child return
* semantics.
*/
int arch_setup_new_thread_orig(struct ktcb *new, struct ktcb *orig)
{
/*
* Pre-syscall context is saved on the kernel stack upon
* a system call exception. We need the location where it
* is saved relative to the start of ktcb.
*/
unsigned long syscall_context_offset =
((unsigned long)(orig->syscall_regs) - (unsigned long)orig);
/*
* Copy the saved context from original thread's
* stack to new thread stack.
*/
memcpy((void *)((unsigned long)new + syscall_context_offset),
(void *)((unsigned long)orig + syscall_context_offset),
sizeof(syscall_context_t));
/*
* Set new thread's syscall_regs offset since its
* normally set during syscall entry
*/
new->syscall_regs = (syscall_context_t *)
((unsigned long)new + syscall_context_offset);
/*
* Modify the return register value with 0 to ensure new thread
* returns with that value. This is a POSIX requirement and enforces
* policy on the microkernel, but it is currently the best solution.
*
* A cleaner but slower way would be the pager setting child registers
* via exchange_registers() and start the child thread afterwards.
*/
KTCB_REF_MR0(new)[MR_RETURN] = 0;
/*
* Set up the stack pointer, saved program status register and the
* program counter so that next time the new thread schedules, it
* executes the end part of the system call exception where the
* previous context is restored.
*/
new->context.sp = (unsigned long)new->syscall_regs;
new->context.pc = (unsigned long)&return_from_syscall;
new->context.spsr = (unsigned long)orig->context.spsr;
/* Copy other relevant fields from original ktcb */
new->pagerid = orig->pagerid;
/* Distribute original thread's ticks into two threads */
new->ticks_left = orig->ticks_left / 2;
orig->ticks_left /= 2;
return 0;
}
int thread_setup_new_ids(struct task_ids *ids, unsigned int flags,
struct ktcb *new, struct ktcb *orig)
{

21
tasks/mm0/src/fault.c
View File

@@ -449,27 +449,6 @@ int vma_drop_merge_delete_all(struct vm_area *vma)
return 0;
}
int vma_drop_merge_delete_all_old(struct vm_area *vma)
{
struct vm_obj_link *vmo_link, *n;
/* Get the first link on the vma */
BUG_ON(list_empty(&vma->vm_obj_list));
vmo_link = list_entry(vma->vm_obj_list.next,
struct vm_obj_link, list);
/* Traverse and get rid of all links */
list_for_each_entry_safe(vmo_link, n, &vma->vm_obj_list, list) {
vma_drop_merge_delete(vma, vmo_link);
}
do {
vma_drop_merge_delete(vma, vmo_link);
} while((vmo_link = vma_next_link(&vmo_link->list,
&vma->vm_obj_list)));
return 0;
}
/* TODO:
* - Why not allocate a swap descriptor in vma_create_shadow() rather than