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Diffstat (limited to 'arch/um/kernel/skas/mmu.c')
-rw-r--r--arch/um/kernel/skas/mmu.c25
1 files changed, 6 insertions, 19 deletions
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 1aee587e9c5d..4947b319f53a 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -92,8 +92,6 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
goto out_free;
}
- to_mm->stub_pages = NULL;
-
return 0;
out_free:
@@ -103,7 +101,7 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
return ret;
}
-void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+void uml_setup_stubs(struct mm_struct *mm)
{
struct page **pages;
int err, ret;
@@ -120,29 +118,20 @@ void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
if (ret)
goto out;
- pages = kmalloc(2 * sizeof(struct page *), GFP_KERNEL);
- if (pages == NULL) {
- printk(KERN_ERR "arch_dup_mmap failed to allocate 2 page "
- "pointers\n");
- goto out;
- }
-
- pages[0] = virt_to_page(&__syscall_stub_start);
- pages[1] = virt_to_page(mm->context.id.stack);
- mm->context.stub_pages = pages;
+ mm->context.stub_pages[0] = virt_to_page(&__syscall_stub_start);
+ mm->context.stub_pages[1] = virt_to_page(mm->context.id.stack);
/* dup_mmap already holds mmap_sem */
err = install_special_mapping(mm, STUB_START, STUB_END - STUB_START,
VM_READ | VM_MAYREAD | VM_EXEC |
- VM_MAYEXEC | VM_DONTCOPY, pages);
+ VM_MAYEXEC | VM_DONTCOPY,
+ mm->context.stub_pages);
if (err) {
printk(KERN_ERR "install_special_mapping returned %d\n", err);
- goto out_free;
+ goto out;
}
return;
-out_free:
- kfree(pages);
out:
force_sigsegv(SIGSEGV, current);
}
@@ -151,8 +140,6 @@ void arch_exit_mmap(struct mm_struct *mm)
{
pte_t *pte;
- if (mm->context.stub_pages != NULL)
- kfree(mm->context.stub_pages);
pte = virt_to_pte(mm, STUB_CODE);
if (pte != NULL)
pte_clear(mm, STUB_CODE, pte);