* [merged] mempolicy-kill-do_set_mempolicy-down_writemm-mmap_sem.patch removed from -mm tree
@ 2014-10-13 18:20 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2014-10-13 18:20 UTC (permalink / raw)
To: oleg, andi, ebiederm, gorcunov, hughd, kamezawa.hiroyu,
kirill.shutemov, kosaki.motohiro, n-horiguchi, peterz, rientjes,
viro, mm-commits
The patch titled
Subject: mempolicy: kill do_set_mempolicy()->down_write(&mm->mmap_sem)
has been removed from the -mm tree. Its filename was
mempolicy-kill-do_set_mempolicy-down_writemm-mmap_sem.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Oleg Nesterov <oleg@redhat.com>
Subject: mempolicy: kill do_set_mempolicy()->down_write(&mm->mmap_sem)
Remove down_write(&mm->mmap_sem) in do_set_mempolicy(). This logic
was never correct and it is no longer needed, see the previous patch.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/mempolicy.c | 15 +--------------
1 file changed, 1 insertion(+), 14 deletions(-)
diff -puN mm/mempolicy.c~mempolicy-kill-do_set_mempolicy-down_writemm-mmap_sem mm/mempolicy.c
--- a/mm/mempolicy.c~mempolicy-kill-do_set_mempolicy-down_writemm-mmap_sem
+++ a/mm/mempolicy.c
@@ -802,7 +802,6 @@ static long do_set_mempolicy(unsigned sh
nodemask_t *nodes)
{
struct mempolicy *new, *old;
- struct mm_struct *mm = current->mm;
NODEMASK_SCRATCH(scratch);
int ret;
@@ -814,20 +813,11 @@ static long do_set_mempolicy(unsigned sh
ret = PTR_ERR(new);
goto out;
}
- /*
- * prevent changing our mempolicy while show_numa_maps()
- * is using it.
- * Note: do_set_mempolicy() can be called at init time
- * with no 'mm'.
- */
- if (mm)
- down_write(&mm->mmap_sem);
+
task_lock(current);
ret = mpol_set_nodemask(new, nodes, scratch);
if (ret) {
task_unlock(current);
- if (mm)
- up_write(&mm->mmap_sem);
mpol_put(new);
goto out;
}
@@ -837,9 +827,6 @@ static long do_set_mempolicy(unsigned sh
nodes_weight(new->v.nodes))
current->il_next = first_node(new->v.nodes);
task_unlock(current);
- if (mm)
- up_write(&mm->mmap_sem);
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2014-10-13 18:20 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-10-13 18:20 [merged] mempolicy-kill-do_set_mempolicy-down_writemm-mmap_sem.patch removed from -mm tree akpm
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.