The patch titled
madvise() does not always return -EBADF on non-file mapped area
has been added to the -mm tree. Its filename is
madvise-does-not-always-return-ebadf-on-non-file.patch
Patches currently in -mm which might be from [EMAIL PROTECTED] are
madvise-does-not-always-return-ebadf-on-non-file.patch
From: suzuki <[EMAIL PROTECTED]>
The madvise() system call returns -EBADF for areas which does not map to
files, only for *behaviour* request MADV_WILLNEED.
According to man pages, madvise returns :
EBADF - the map exists, but the area maps something that isnt a file.
Fixes bug 2995.
Signed-off-by: Suzuki K P <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
mm/madvise.c | 13 ++++++++-----
1 files changed, 8 insertions(+), 5 deletions(-)
diff -puN mm/madvise.c~madvise-does-not-always-return-ebadf-on-non-file
mm/madvise.c
--- 25/mm/madvise.c~madvise-does-not-always-return-ebadf-on-non-file Wed Jul
6 13:50:30 2005
+++ 25-akpm/mm/madvise.c Wed Jul 6 13:51:56 2005
@@ -83,9 +83,6 @@ static long madvise_willneed(struct vm_a
{
struct file *file = vma->vm_file;
- if (!file)
- return -EBADF;
-
if (file->f_mapping->a_ops->get_xip_page) {
/* no bad return value, but ignore advice */
return 0;
@@ -140,11 +137,16 @@ static long madvise_dontneed(struct vm_a
return 0;
}
-static long madvise_vma(struct vm_area_struct *vma, struct vm_area_struct
**prev,
- unsigned long start, unsigned long end, int behavior)
+static long
+madvise_vma(struct vm_area_struct *vma, struct vm_area_struct **prev,
+ unsigned long start, unsigned long end, int behavior)
{
+ struct file *filp = vma->vm_file;
long error = -EBADF;
+ if (!filp)
+ goto out;
+
switch (behavior) {
case MADV_NORMAL:
case MADV_SEQUENTIAL:
@@ -165,6 +167,7 @@ static long madvise_vma(struct vm_area_s
break;
}
+out:
return error;
}
_
-
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