diff options
Diffstat (limited to 'mm/mincore.c')
| -rw-r--r-- | mm/mincore.c | 29 |
1 files changed, 10 insertions, 19 deletions
diff --git a/mm/mincore.c b/mm/mincore.c index b44d7f875cb6..566b6c2bae5f 100644 --- a/mm/mincore.c +++ b/mm/mincore.c @@ -49,29 +49,20 @@ static long do_mincore(unsigned long addr, unsigned char *vec, unsigned long pag struct vm_area_struct *vma = find_vma(current->mm, addr); /* - * find_vma() didn't find anything: the address - * is above everything we have mapped. + * find_vma() didn't find anything above us, or we're + * in an unmapped hole in the address space: ENOMEM. */ - if (!vma) { - memset(vec, 0, pages); - return pages; - } - - /* - * find_vma() found something, but we might be - * below it: check for that. - */ - if (addr < vma->vm_start) { - unsigned long gap = (vma->vm_start - addr) >> PAGE_SHIFT; - if (gap > pages) - gap = pages; - memset(vec, 0, gap); - return gap; - } + if (!vma || addr < vma->vm_start) + return -ENOMEM; /* * Ok, got it. But check whether it's a segment we support * mincore() on. Right now, we don't do any anonymous mappings. + * + * FIXME: This is just stupid. And returning ENOMEM is + * stupid too. We should just look at the page tables. But + * this is what we've traditionally done, so we'll just + * continue doing it. */ if (!vma->vm_file) return -ENOMEM; @@ -142,7 +133,7 @@ asmlinkage long sys_mincore(unsigned long start, size_t len, tmp = (void *) __get_free_page(GFP_USER); if (!tmp) - return -ENOMEM; + return -EAGAIN; retval = 0; while (pages) { |