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 <[email protected]>
---
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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