[PATCH 6/9 take 2] mm: uml kill unused

[Hugh Dickins]

In worrying over the various pte operations in different architectures,
I came across some unused functions in UML: remove mprotect_kernel_vm
and protect_vm_page; but leave addr_pte, Jeff notes it's useful in gdb.

Signed-off-by: Hugh Dickins <hugh@xxxxxxxxxxx>
---
This replaces yesterday's 6/9, following Jeff's feedback - thanks.

 arch/um/include/tlb.h   |    1 -
 arch/um/kernel/tt/tlb.c |   36 ------------------------------------
 2 files changed, 37 deletions(-)

--- mm5/arch/um/include/tlb.h	2005-10-11 12:07:16.000000000 +0100
+++ mm6/arch/um/include/tlb.h	2005-10-22 14:07:12.000000000 +0100
@@ -34,7 +34,6 @@ struct host_vm_op {
 	} u;
 };
 
-extern void mprotect_kernel_vm(int w);
 extern void force_flush_all(void);
 extern void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
                              unsigned long end_addr, int force,
--- mm5/arch/um/kernel/tt/tlb.c	2005-10-11 12:07:16.000000000 +0100
+++ mm6/arch/um/kernel/tt/tlb.c	2005-10-22 14:07:12.000000000 +0100
@@ -74,42 +74,6 @@ void flush_tlb_kernel_range_tt(unsigned 
                 atomic_inc(&vmchange_seq);
 }
 
-static void protect_vm_page(unsigned long addr, int w, int must_succeed)
-{
-	int err;
-
-	err = protect_memory(addr, PAGE_SIZE, 1, w, 1, must_succeed);
-	if(err == 0) return;
-	else if((err == -EFAULT) || (err == -ENOMEM)){
-		flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
-		protect_vm_page(addr, w, 1);
-	}
-	else panic("protect_vm_page : protect failed, errno = %d\n", err);
-}
-
-void mprotect_kernel_vm(int w)
-{
-	struct mm_struct *mm;
-	pgd_t *pgd;
-	pud_t *pud;
-	pmd_t *pmd;
-	pte_t *pte;
-	unsigned long addr;
-	
-	mm = &init_mm;
-	for(addr = start_vm; addr < end_vm;){
-		pgd = pgd_offset(mm, addr);
-		pud = pud_offset(pgd, addr);
-		pmd = pmd_offset(pud, addr);
-		if(pmd_present(*pmd)){
-			pte = pte_offset_kernel(pmd, addr);
-			if(pte_present(*pte)) protect_vm_page(addr, w, 0);
-			addr += PAGE_SIZE;
-		}
-		else addr += PMD_SIZE;
-	}
-}
-
 void flush_tlb_kernel_vm_tt(void)
 {
         flush_tlb_kernel_range(start_vm, end_vm);
-
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