From e87534414925e990425914e4a08bb42761166cfa Mon Sep 17 00:00:00 2001
From: Bahadir Balban <bbalban@b-labs.co.uk>
Date: Fri, 24 Oct 2008 13:55:51 +0300
Subject: [PATCH] Remove unused functions

---
 src/api/thread.c      | 63 -------------------------------------------
 tasks/mm0/src/fault.c | 21 ---------------
 2 files changed, 84 deletions(-)

diff --git a/src/api/thread.c b/src/api/thread.c
index aa4c0b7..c6cb4a2 100644
--- a/src/api/thread.c
+++ b/src/api/thread.c
@@ -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)
 {
diff --git a/tasks/mm0/src/fault.c b/tasks/mm0/src/fault.c
index efc17d9..d267286 100644
--- a/tasks/mm0/src/fault.c
+++ b/tasks/mm0/src/fault.c
@@ -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