From c58267c32429ea6535428ca6b8a036892c1697f2 Mon Sep 17 00:00:00 2001 From: KOSAKI Motohiro Date: Fri, 5 Mar 2010 13:41:43 -0800 Subject: [PATCH] mm: mlock_vma_pages_range() never return negative value Currently, mlock_vma_pages_range() never return negative value. Then, we can remove some worthless error check. Signed-off-by: KOSAKI Motohiro Cc: Nick Piggin Cc: Lee Schermerhorn Cc: Rik van Riel Cc: KAMEZAWA Hiroyuki Cc: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/mmap.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/mm/mmap.c b/mm/mmap.c index ee2298936fe6..7acd7b0ad176 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1265,12 +1265,7 @@ out: mm->total_vm += len >> PAGE_SHIFT; vm_stat_account(mm, vm_flags, file, len >> PAGE_SHIFT); if (vm_flags & VM_LOCKED) { - /* - * makes pages present; downgrades, drops, reacquires mmap_sem - */ long nr_pages = mlock_vma_pages_range(vma, addr, addr + len); - if (nr_pages < 0) - return nr_pages; /* vma gone! */ mm->locked_vm += (len >> PAGE_SHIFT) - nr_pages; } else if ((flags & MAP_POPULATE) && !(flags & MAP_NONBLOCK)) make_pages_present(addr, addr + len); @@ -1754,8 +1749,7 @@ find_extend_vma(struct mm_struct *mm, unsigned long addr) if (!prev || expand_stack(prev, addr)) return NULL; if (prev->vm_flags & VM_LOCKED) { - if (mlock_vma_pages_range(prev, addr, prev->vm_end) < 0) - return NULL; /* vma gone! */ + mlock_vma_pages_range(prev, addr, prev->vm_end); } return prev; } @@ -1783,8 +1777,7 @@ find_extend_vma(struct mm_struct * mm, unsigned long addr) if (expand_stack(vma, addr)) return NULL; if (vma->vm_flags & VM_LOCKED) { - if (mlock_vma_pages_range(vma, addr, start) < 0) - return NULL; /* vma gone! */ + mlock_vma_pages_range(vma, addr, start); } return vma; } -- 2.20.1