* [PATCH 0/3] simple mmap() cleanups
@ 2013-07-14 16:54 Oleg Nesterov
2013-07-14 16:54 ` [PATCH 1/3] mm: shift VM_GROWS* check from mmap_region() to do_mmap_pgoff() Oleg Nesterov
` (2 more replies)
0 siblings, 3 replies; 9+ messages in thread
From: Oleg Nesterov @ 2013-07-14 16:54 UTC (permalink / raw)
To: Andrew Morton, Hugh Dickins
Cc: Al Viro, Colin Cross, David Rientjes, KOSAKI Motohiro, linux-kernel
Hello.
Hopefully the simple cleanups, but need the authoritative acks.
I simply can't understand the VM_GROWS* check in mmap_region(),
did I miss something subtle? I will appreciate any review.
Can't resist. "(prot&PROT_WRITE) && !(file->f_mode&FMODE_WRITE)"
asks for the whitespace cleanup, but this will break the 80-col
rule. Perhaps we should relax it...
Oleg.
mm/mmap.c | 28 ++++++++++------------------
1 files changed, 10 insertions(+), 18 deletions(-)
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH 1/3] mm: shift VM_GROWS* check from mmap_region() to do_mmap_pgoff()
2013-07-14 16:54 [PATCH 0/3] simple mmap() cleanups Oleg Nesterov
@ 2013-07-14 16:54 ` Oleg Nesterov
2013-07-16 21:43 ` Andrew Morton
2013-07-14 16:54 ` [PATCH 2/3] mm: do_mmap_pgoff: cleanup the usage of file_inode() Oleg Nesterov
2013-07-14 16:54 ` [PATCH 3/3] mm: mmap_region: kill correct_wcount/inode, use allow_write_access() Oleg Nesterov
2 siblings, 1 reply; 9+ messages in thread
From: Oleg Nesterov @ 2013-07-14 16:54 UTC (permalink / raw)
To: Andrew Morton, Hugh Dickins
Cc: Al Viro, Colin Cross, David Rientjes, KOSAKI Motohiro, linux-kernel
mmap() doesn't allow the non-anonymous mappings with VM_GROWS* bit set.
In particular this means that mmap_region()->vma_merge(file, vm_flags)
must always fail if vm_flags & VM_GROWS. So it does not make sense to
check VM_GROWS* after we already allocated the new vma, the only caller,
do_mmap_pgoff(), which can pass this flag can do the check itself.
And this looks a bit more correct, mmap_region() already unmapped the
old mapping at this stage. But if mmap() is going to fail, it should
avoid do_munmap() if possible.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
mm/mmap.c | 9 +++------
1 files changed, 3 insertions(+), 6 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index f681e18..6b69352 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1327,6 +1327,9 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
}
}
+ /* Only MAP_PRIVATE|MAP_ANONYMOUS can use MAP_GROWS */
+ if ((vm_flags & VM_MAYSHARE) && (vm_flags & (VM_GROWSDOWN|VM_GROWSUP)))
+ return -EINVAL;
/*
* Set 'VM_NORESERVE' if we should not account for the
* memory use of this mapping.
@@ -1542,11 +1545,7 @@ munmap_back:
vma->vm_pgoff = pgoff;
INIT_LIST_HEAD(&vma->anon_vma_chain);
- error = -EINVAL; /* when rejecting VM_GROWSDOWN|VM_GROWSUP */
-
if (file) {
- if (vm_flags & (VM_GROWSDOWN|VM_GROWSUP))
- goto free_vma;
if (vm_flags & VM_DENYWRITE) {
error = deny_write_access(file);
if (error)
@@ -1571,8 +1570,6 @@ munmap_back:
pgoff = vma->vm_pgoff;
vm_flags = vma->vm_flags;
} else if (vm_flags & VM_SHARED) {
- if (unlikely(vm_flags & (VM_GROWSDOWN|VM_GROWSUP)))
- goto free_vma;
error = shmem_zero_setup(vma);
if (error)
goto free_vma;
--
1.5.5.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH 2/3] mm: do_mmap_pgoff: cleanup the usage of file_inode()
2013-07-14 16:54 [PATCH 0/3] simple mmap() cleanups Oleg Nesterov
2013-07-14 16:54 ` [PATCH 1/3] mm: shift VM_GROWS* check from mmap_region() to do_mmap_pgoff() Oleg Nesterov
@ 2013-07-14 16:54 ` Oleg Nesterov
2013-07-14 16:54 ` [PATCH 3/3] mm: mmap_region: kill correct_wcount/inode, use allow_write_access() Oleg Nesterov
2 siblings, 0 replies; 9+ messages in thread
From: Oleg Nesterov @ 2013-07-14 16:54 UTC (permalink / raw)
To: Andrew Morton, Hugh Dickins
Cc: Al Viro, Colin Cross, David Rientjes, KOSAKI Motohiro, linux-kernel
Simple cleanup. Move "struct inode *inode" variable into "if (file)"
block to simplify the code and avoid the unnecessary check.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
mm/mmap.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index 6b69352..759dce7 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1202,7 +1202,6 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
unsigned long *populate)
{
struct mm_struct * mm = current->mm;
- struct inode *inode;
vm_flags_t vm_flags;
*populate = 0;
@@ -1265,9 +1264,9 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
return -EAGAIN;
}
- inode = file ? file_inode(file) : NULL;
-
if (file) {
+ struct inode *inode = file_inode(file);
+
switch (flags & MAP_TYPE) {
case MAP_SHARED:
if ((prot&PROT_WRITE) && !(file->f_mode&FMODE_WRITE))
--
1.5.5.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH 3/3] mm: mmap_region: kill correct_wcount/inode, use allow_write_access()
2013-07-14 16:54 [PATCH 0/3] simple mmap() cleanups Oleg Nesterov
2013-07-14 16:54 ` [PATCH 1/3] mm: shift VM_GROWS* check from mmap_region() to do_mmap_pgoff() Oleg Nesterov
2013-07-14 16:54 ` [PATCH 2/3] mm: do_mmap_pgoff: cleanup the usage of file_inode() Oleg Nesterov
@ 2013-07-14 16:54 ` Oleg Nesterov
2 siblings, 0 replies; 9+ messages in thread
From: Oleg Nesterov @ 2013-07-14 16:54 UTC (permalink / raw)
To: Andrew Morton, Hugh Dickins
Cc: Al Viro, Colin Cross, David Rientjes, KOSAKI Motohiro, linux-kernel
correct_wcount and inode in mmap_region() just complicate the code.
This boolean was needed previously, when deny_write_access() was
called before vma_merge(), now we can simply check VM_DENYWRITE and
do allow_write_access() if it is set.
allow_write_access() checks file != NULL, so this is safe even if it
was possible to use VM_DENYWRITE && !file. Just we need to ensure we
use the same file which was deny_write_access()'ed, so the patch also
moves "file = vma->vm_file" down after allow_write_access().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
mm/mmap.c | 14 +++++---------
1 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index 759dce7..7be923a 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1476,11 +1476,9 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma, *prev;
- int correct_wcount = 0;
int error;
struct rb_node **rb_link, *rb_parent;
unsigned long charged = 0;
- struct inode *inode = file ? file_inode(file) : NULL;
/* Check against address space limit. */
if (!may_expand_vm(mm, len >> PAGE_SHIFT)) {
@@ -1549,7 +1547,6 @@ munmap_back:
error = deny_write_access(file);
if (error)
goto free_vma;
- correct_wcount = 1;
}
vma->vm_file = get_file(file);
error = file->f_op->mmap(file, vma);
@@ -1590,11 +1587,10 @@ munmap_back:
}
vma_link(mm, vma, prev, rb_link, rb_parent);
- file = vma->vm_file;
-
/* Once vma denies write, undo our temporary denial count */
- if (correct_wcount)
- atomic_inc(&inode->i_writecount);
+ if (vm_flags & VM_DENYWRITE)
+ allow_write_access(file);
+ file = vma->vm_file;
out:
perf_event_mmap(vma);
@@ -1613,8 +1609,8 @@ out:
return addr;
unmap_and_free_vma:
- if (correct_wcount)
- atomic_inc(&inode->i_writecount);
+ if (vm_flags & VM_DENYWRITE)
+ allow_write_access(file);
vma->vm_file = NULL;
fput(file);
--
1.5.5.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH 1/3] mm: shift VM_GROWS* check from mmap_region() to do_mmap_pgoff()
2013-07-14 16:54 ` [PATCH 1/3] mm: shift VM_GROWS* check from mmap_region() to do_mmap_pgoff() Oleg Nesterov
@ 2013-07-16 21:43 ` Andrew Morton
2013-07-20 2:02 ` Hugh Dickins
0 siblings, 1 reply; 9+ messages in thread
From: Andrew Morton @ 2013-07-16 21:43 UTC (permalink / raw)
To: Oleg Nesterov
Cc: Hugh Dickins, Al Viro, Colin Cross, David Rientjes,
KOSAKI Motohiro, linux-kernel
On Sun, 14 Jul 2013 18:54:51 +0200 Oleg Nesterov <oleg@redhat.com> wrote:
> mmap() doesn't allow the non-anonymous mappings with VM_GROWS* bit set.
> In particular this means that mmap_region()->vma_merge(file, vm_flags)
> must always fail if vm_flags & VM_GROWS. So it does not make sense to
> check VM_GROWS* after we already allocated the new vma, the only caller,
> do_mmap_pgoff(), which can pass this flag can do the check itself.
>
> And this looks a bit more correct, mmap_region() already unmapped the
> old mapping at this stage. But if mmap() is going to fail, it should
> avoid do_munmap() if possible.
>
> ...
>
> --- a/mm/mmap.c
> +++ b/mm/mmap.c
> @@ -1327,6 +1327,9 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
> }
> }
>
> + /* Only MAP_PRIVATE|MAP_ANONYMOUS can use MAP_GROWS */
> + if ((vm_flags & VM_MAYSHARE) && (vm_flags & (VM_GROWSDOWN|VM_GROWSUP)))
That is of course vm_flags&(VM_MAYSHARE|VM_GROWSDOWN|VM_GROWSUP), but
that perhaps is less clear.
> + return -EINVAL;
I had to stare for a while but yes, the change looks OK to me.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 1/3] mm: shift VM_GROWS* check from mmap_region() to do_mmap_pgoff()
2013-07-16 21:43 ` Andrew Morton
@ 2013-07-20 2:02 ` Hugh Dickins
2013-07-20 15:22 ` [PATCH v2 0/1] " Oleg Nesterov
0 siblings, 1 reply; 9+ messages in thread
From: Hugh Dickins @ 2013-07-20 2:02 UTC (permalink / raw)
To: Andrew Morton
Cc: Oleg Nesterov, Hugh Dickins, Al Viro, Colin Cross,
David Rientjes, KOSAKI Motohiro, linux-kernel
On Tue, 16 Jul 2013, Andrew Morton wrote:
> On Sun, 14 Jul 2013 18:54:51 +0200 Oleg Nesterov <oleg@redhat.com> wrote:
>
> > mmap() doesn't allow the non-anonymous mappings with VM_GROWS* bit set.
> > In particular this means that mmap_region()->vma_merge(file, vm_flags)
> > must always fail if vm_flags & VM_GROWS.
I didn't understand that sentence: if file is non-NULL perhaps?
> > So it does not make sense to
> > check VM_GROWS* after we already allocated the new vma, the only caller,
> > do_mmap_pgoff(), which can pass this flag can do the check itself.
> >
> > And this looks a bit more correct, mmap_region() already unmapped the
> > old mapping at this stage. But if mmap() is going to fail, it should
> > avoid do_munmap() if possible.
I agree with the sentiment, but the patch looks wrong to me.
> >
> > ...
> >
> > --- a/mm/mmap.c
> > +++ b/mm/mmap.c
> > @@ -1327,6 +1327,9 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
> > }
> > }
> >
> > + /* Only MAP_PRIVATE|MAP_ANONYMOUS can use MAP_GROWS */
> > + if ((vm_flags & VM_MAYSHARE) && (vm_flags & (VM_GROWSDOWN|VM_GROWSUP)))
>
> That is of course vm_flags&(VM_MAYSHARE|VM_GROWSDOWN|VM_GROWSUP),
Seems very plausible, but I believe you're wrong on that!
> but that perhaps is less clear.
>
> > + return -EINVAL;
>
> I had to stare for a while but yes, the change looks OK to me.
It did need staring, yes, but it looks NOK to me: this change permits
mmap(addr, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_GROWSDOWN, fd, off)
where fd is for a real file: we never allowed MAP_GROWSDOWN on private
(or shared) mappings of real files before, and I think we should not now.
Hugh
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH v2 0/1] mm: shift VM_GROWS* check from mmap_region() to do_mmap_pgoff()
2013-07-20 2:02 ` Hugh Dickins
@ 2013-07-20 15:22 ` Oleg Nesterov
2013-07-20 15:23 ` [PATCH v2 1/1] " Oleg Nesterov
0 siblings, 1 reply; 9+ messages in thread
From: Oleg Nesterov @ 2013-07-20 15:22 UTC (permalink / raw)
To: Hugh Dickins, Andrew Morton
Cc: Al Viro, Colin Cross, David Rientjes, KOSAKI Motohiro, linux-kernel
Andrew,
This patch replaces the buggy
mm-shift-vm_grows-check-from-mmap_region-to-do_mmap_pgoff.patch
I do not send the *-fix.patch because I'd like to update the changelog.
However it needs the explicit ack from Hugh.
On 07/19, Hugh Dickins wrote:
>
> On Tue, 16 Jul 2013, Andrew Morton wrote:
> > On Sun, 14 Jul 2013 18:54:51 +0200 Oleg Nesterov <oleg@redhat.com> wrote:
> >
> > > mmap() doesn't allow the non-anonymous mappings with VM_GROWS* bit set.
> > > In particular this means that mmap_region()->vma_merge(file, vm_flags)
> > > must always fail if vm_flags & VM_GROWS.
>
> I didn't understand that sentence: if file is non-NULL perhaps?
Yes, this looks confusing, sorry.
I meant, vma_merge() must fail if "vm_flags & VM_GROWS" is set incorrectly.
is_mergeable_vma() compares both vm_file and vm_flags.
Even if file == NULL (at this stage), "VM_SHARED | VM_GROWS" is not correct
too, and vma_merge() can't succeed.
And, to clarify, I only mentioned this because I tried to convince myself
that this change (if correct) can't make any difference except "avoid the
not-really-correct do_munmap".
> > > So it does not make sense to
> > > check VM_GROWS* after we already allocated the new vma, the only caller,
> > > do_mmap_pgoff(), which can pass this flag can do the check itself.
> > >
> > > And this looks a bit more correct, mmap_region() already unmapped the
> > > old mapping at this stage. But if mmap() is going to fail, it should
> > > avoid do_munmap() if possible.
>
> I agree with the sentiment, but the patch looks wrong to me.
Heh. You are right of course.
> It did need staring, yes, but it looks NOK to me: this change permits
> mmap(addr, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_GROWSDOWN, fd, off)
> where fd is for a real file:
And note that "Only MAP_PRIVATE|MAP_ANONYMOUS can use MAP_GROWS" even
tries to document that "MAP_PRIVATE && file" is not allowed too.
I have no idea how I managed to forget that MAP_PRIVATE never sets
VM_MAYSHARE.
Thanks a lot Hugh.
Oleg.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH v2 1/1] mm: shift VM_GROWS* check from mmap_region() to do_mmap_pgoff()
2013-07-20 15:22 ` [PATCH v2 0/1] " Oleg Nesterov
@ 2013-07-20 15:23 ` Oleg Nesterov
2013-07-22 23:30 ` Hugh Dickins
0 siblings, 1 reply; 9+ messages in thread
From: Oleg Nesterov @ 2013-07-20 15:23 UTC (permalink / raw)
To: Hugh Dickins, Andrew Morton
Cc: Al Viro, Colin Cross, David Rientjes, KOSAKI Motohiro, linux-kernel
mmap() doesn't allow the non-anonymous mappings with VM_GROWS* bit set.
In particular this means that mmap_region()->vma_merge(file, vm_flags)
must always fail if "vm_flags & VM_GROWS" is set incorrectly.
So it does not make sense to check VM_GROWS* after we already allocated
the new vma, the only caller, do_mmap_pgoff(), which can pass this flag
can do the check itself.
And this looks a bit more correct, mmap_region() already unmapped the
old mapping at this stage. But if mmap() is going to fail, it should
avoid do_munmap() if possible.
Note: we check VM_GROWS at the end to ensure that do_mmap_pgoff() won't
return EINVAL in the case when it currently returns another error code.
Many thanks to Hugh who nacked the buggy v1.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
mm/mmap.c | 10 ++++------
1 files changed, 4 insertions(+), 6 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index fbad7b0..92d9f54 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1302,6 +1302,8 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
if (!file->f_op || !file->f_op->mmap)
return -ENODEV;
+ if (vm_flags & (VM_GROWSDOWN|VM_GROWSUP))
+ return -EINVAL;
break;
default:
@@ -1310,6 +1312,8 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
} else {
switch (flags & MAP_TYPE) {
case MAP_SHARED:
+ if (vm_flags & (VM_GROWSDOWN|VM_GROWSUP))
+ return -EINVAL;
/*
* Ignore pgoff.
*/
@@ -1544,11 +1548,7 @@ munmap_back:
vma->vm_pgoff = pgoff;
INIT_LIST_HEAD(&vma->anon_vma_chain);
- error = -EINVAL; /* when rejecting VM_GROWSDOWN|VM_GROWSUP */
-
if (file) {
- if (vm_flags & (VM_GROWSDOWN|VM_GROWSUP))
- goto free_vma;
if (vm_flags & VM_DENYWRITE) {
error = deny_write_access(file);
if (error)
@@ -1573,8 +1573,6 @@ munmap_back:
pgoff = vma->vm_pgoff;
vm_flags = vma->vm_flags;
} else if (vm_flags & VM_SHARED) {
- if (unlikely(vm_flags & (VM_GROWSDOWN|VM_GROWSUP)))
- goto free_vma;
error = shmem_zero_setup(vma);
if (error)
goto free_vma;
--
1.5.5.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH v2 1/1] mm: shift VM_GROWS* check from mmap_region() to do_mmap_pgoff()
2013-07-20 15:23 ` [PATCH v2 1/1] " Oleg Nesterov
@ 2013-07-22 23:30 ` Hugh Dickins
0 siblings, 0 replies; 9+ messages in thread
From: Hugh Dickins @ 2013-07-22 23:30 UTC (permalink / raw)
To: Oleg Nesterov
Cc: Andrew Morton, Al Viro, Colin Cross, David Rientjes,
KOSAKI Motohiro, linux-kernel
On Sat, 20 Jul 2013, Oleg Nesterov wrote:
> mmap() doesn't allow the non-anonymous mappings with VM_GROWS* bit set.
> In particular this means that mmap_region()->vma_merge(file, vm_flags)
> must always fail if "vm_flags & VM_GROWS" is set incorrectly.
>
> So it does not make sense to check VM_GROWS* after we already allocated
> the new vma, the only caller, do_mmap_pgoff(), which can pass this flag
> can do the check itself.
>
> And this looks a bit more correct, mmap_region() already unmapped the
> old mapping at this stage. But if mmap() is going to fail, it should
> avoid do_munmap() if possible.
>
> Note: we check VM_GROWS at the end to ensure that do_mmap_pgoff() won't
> return EINVAL in the case when it currently returns another error code.
>
> Many thanks to Hugh who nacked the buggy v1.
Aw shucks, no need for that!
>
> Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Looks fine to me now, thanks Oleg; as do your other two.
Acked-by: Hugh Dickins <hughd@google.com>
> ---
> mm/mmap.c | 10 ++++------
> 1 files changed, 4 insertions(+), 6 deletions(-)
>
> diff --git a/mm/mmap.c b/mm/mmap.c
> index fbad7b0..92d9f54 100644
> --- a/mm/mmap.c
> +++ b/mm/mmap.c
> @@ -1302,6 +1302,8 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
>
> if (!file->f_op || !file->f_op->mmap)
> return -ENODEV;
> + if (vm_flags & (VM_GROWSDOWN|VM_GROWSUP))
> + return -EINVAL;
> break;
>
> default:
> @@ -1310,6 +1312,8 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
> } else {
> switch (flags & MAP_TYPE) {
> case MAP_SHARED:
> + if (vm_flags & (VM_GROWSDOWN|VM_GROWSUP))
> + return -EINVAL;
> /*
> * Ignore pgoff.
> */
> @@ -1544,11 +1548,7 @@ munmap_back:
> vma->vm_pgoff = pgoff;
> INIT_LIST_HEAD(&vma->anon_vma_chain);
>
> - error = -EINVAL; /* when rejecting VM_GROWSDOWN|VM_GROWSUP */
> -
> if (file) {
> - if (vm_flags & (VM_GROWSDOWN|VM_GROWSUP))
> - goto free_vma;
> if (vm_flags & VM_DENYWRITE) {
> error = deny_write_access(file);
> if (error)
> @@ -1573,8 +1573,6 @@ munmap_back:
> pgoff = vma->vm_pgoff;
> vm_flags = vma->vm_flags;
> } else if (vm_flags & VM_SHARED) {
> - if (unlikely(vm_flags & (VM_GROWSDOWN|VM_GROWSUP)))
> - goto free_vma;
> error = shmem_zero_setup(vma);
> if (error)
> goto free_vma;
> --
> 1.5.5.1
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2013-07-22 23:31 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-07-14 16:54 [PATCH 0/3] simple mmap() cleanups Oleg Nesterov
2013-07-14 16:54 ` [PATCH 1/3] mm: shift VM_GROWS* check from mmap_region() to do_mmap_pgoff() Oleg Nesterov
2013-07-16 21:43 ` Andrew Morton
2013-07-20 2:02 ` Hugh Dickins
2013-07-20 15:22 ` [PATCH v2 0/1] " Oleg Nesterov
2013-07-20 15:23 ` [PATCH v2 1/1] " Oleg Nesterov
2013-07-22 23:30 ` Hugh Dickins
2013-07-14 16:54 ` [PATCH 2/3] mm: do_mmap_pgoff: cleanup the usage of file_inode() Oleg Nesterov
2013-07-14 16:54 ` [PATCH 3/3] mm: mmap_region: kill correct_wcount/inode, use allow_write_access() Oleg Nesterov
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