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authorHugh Dickins <hugh@veritas.com>2005-11-21 21:32:19 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-22 09:13:42 -0800
commitf57e88a8d83de8d844b57e16b84d2f762fe9f092 (patch)
tree32fee3ab5c177bc0f47827dd18ad4471be3b2a74 /drivers/char
parentee498ed730283e9cdfc8913f12b90a2246f1a8cc (diff)
downloadop-kernel-dev-f57e88a8d83de8d844b57e16b84d2f762fe9f092.zip
op-kernel-dev-f57e88a8d83de8d844b57e16b84d2f762fe9f092.tar.gz
[PATCH] unpaged: ZERO_PAGE in VM_UNPAGED
It's strange enough to be looking out for anonymous pages in VM_UNPAGED areas, let's not insert the ZERO_PAGE there - though whether it would matter will depend on what we decide about ZERO_PAGE refcounting. But whereas do_anonymous_page may (exceptionally) be called on a VM_UNPAGED area, do_no_page should never be: just BUG_ON. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/mem.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 91dd669..29c3b63 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -591,7 +591,7 @@ static inline size_t read_zero_pagealigned(char __user * buf, size_t size)
if (vma->vm_start > addr || (vma->vm_flags & VM_WRITE) == 0)
goto out_up;
- if (vma->vm_flags & (VM_SHARED | VM_HUGETLB))
+ if (vma->vm_flags & (VM_SHARED | VM_HUGETLB | VM_UNPAGED))
break;
count = vma->vm_end - addr;
if (count > size)
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