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| author | Hugh Dickins <hugh.dickins@tiscali.co.uk> | 2009-09-21 17:03:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 07:17:40 -0700 |
| commit | 1c3aff1ceec2cc86810e2690e67873ff0c505862 (patch) | |
| tree | bf2f1badfd3f8859299f00c8a95c0a11e5cfa778 /mm/memory.c | |
| parent | 408e82b78bcc9f1b47c76e833c3df97f675947de (diff) | |
| download | lwn-1c3aff1ceec2cc86810e2690e67873ff0c505862.tar.gz lwn-1c3aff1ceec2cc86810e2690e67873ff0c505862.zip | |
mm: remove unused GUP flags
GUP_FLAGS_IGNORE_VMA_PERMISSIONS and GUP_FLAGS_IGNORE_SIGKILL were
flags added solely to prevent __get_user_pages() from doing some of
what it usually does, in the munlock case: we can now remove them.
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/mm/memory.c b/mm/memory.c index 3cbeaaba5642..4b5200f5f35a 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1217,8 +1217,6 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm, unsigned int vm_flags = 0; int write = !!(flags & GUP_FLAGS_WRITE); int force = !!(flags & GUP_FLAGS_FORCE); - int ignore = !!(flags & GUP_FLAGS_IGNORE_VMA_PERMISSIONS); - int ignore_sigkill = !!(flags & GUP_FLAGS_IGNORE_SIGKILL); if (nr_pages <= 0) return 0; @@ -1244,7 +1242,7 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm, pte_t *pte; /* user gate pages are read-only */ - if (!ignore && write) + if (write) return i ? : -EFAULT; if (pg > TASK_SIZE) pgd = pgd_offset_k(pg); @@ -1278,7 +1276,7 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm, if (!vma || (vma->vm_flags & (VM_IO | VM_PFNMAP)) || - (!ignore && !(vm_flags & vma->vm_flags))) + !(vm_flags & vma->vm_flags)) return i ? : -EFAULT; if (is_vm_hugetlb_page(vma)) { @@ -1298,13 +1296,9 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm, /* * If we have a pending SIGKILL, don't keep faulting - * pages and potentially allocating memory, unless - * current is handling munlock--e.g., on exit. In - * that case, we are not allocating memory. Rather, - * we're only unlocking already resident/mapped pages. + * pages and potentially allocating memory. */ - if (unlikely(!ignore_sigkill && - fatal_signal_pending(current))) + if (unlikely(fatal_signal_pending(current))) return i ? i : -ERESTARTSYS; if (write) |