diff options
Diffstat (limited to 'arch/x86/um/vdso/vma.c')
| -rw-r--r-- | arch/x86/um/vdso/vma.c | 27 |
1 files changed, 10 insertions, 17 deletions
diff --git a/arch/x86/um/vdso/vma.c b/arch/x86/um/vdso/vma.c index 76d9f6ce7a3d..dc8dfb2abd80 100644 --- a/arch/x86/um/vdso/vma.c +++ b/arch/x86/um/vdso/vma.c @@ -12,33 +12,22 @@ static unsigned int __read_mostly vdso_enabled = 1; unsigned long um_vdso_addr; +static struct page *um_vdso; extern unsigned long task_size; extern char vdso_start[], vdso_end[]; -static struct page **vdsop; - static int __init init_vdso(void) { - struct page *um_vdso; - BUG_ON(vdso_end - vdso_start > PAGE_SIZE); um_vdso_addr = task_size - PAGE_SIZE; - vdsop = kmalloc(sizeof(struct page *), GFP_KERNEL); - if (!vdsop) - goto oom; - um_vdso = alloc_page(GFP_KERNEL); - if (!um_vdso) { - kfree(vdsop); - + if (!um_vdso) goto oom; - } copy_page(page_address(um_vdso), vdso_start); - *vdsop = um_vdso; return 0; @@ -52,8 +41,12 @@ subsys_initcall(init_vdso); int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) { - int err; + struct vm_area_struct *vma; struct mm_struct *mm = current->mm; + static struct vm_special_mapping vdso_mapping = { + .name = "[vdso]", + .pages = &um_vdso, + }; if (!vdso_enabled) return 0; @@ -61,12 +54,12 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) if (mmap_write_lock_killable(mm)) return -EINTR; - err = install_special_mapping(mm, um_vdso_addr, PAGE_SIZE, + vma = _install_special_mapping(mm, um_vdso_addr, PAGE_SIZE, VM_READ|VM_EXEC| VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, - vdsop); + &vdso_mapping); mmap_write_unlock(mm); - return err; + return IS_ERR(vma) ? PTR_ERR(vma) : 0; } |