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From: Davidlohr Bueso <dave@stgolabs.net>
To: akpm@linux-foundation.org
Cc: manfred@colorfullife.com, dave@stgolabs.net,
	linux-kernel@vger.kernel.org, Davidlohr Bueso <dbueso@suse.de>
Subject: [PATCH 1/4] ipc/shm: do not check for MAP_POPULATE
Date: Thu,  9 Feb 2017 12:52:59 -0800	[thread overview]
Message-ID: <1486673582-6979-2-git-send-email-dave@stgolabs.net> (raw)
In-Reply-To: <1486673582-6979-1-git-send-email-dave@stgolabs.net>

We do not support prefaulting functionality in sysv shm,
nor MAP_NONBLOCK for that matter. Drop the pointless check
for populate in do_shmat().

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
---
 ipc/shm.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/ipc/shm.c b/ipc/shm.c
index 06ea9ef7f54a..6b3769967789 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -1234,8 +1234,6 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg,
 		err = (long)addr;
 invalid:
 	up_write(&current->mm->mmap_sem);
-	if (populate)
-		mm_populate(addr, populate);
 
 out_fput:
 	fput(file);
-- 
2.6.6

  reply	other threads:[~2017-02-09 20:53 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-09 20:52 [PATCH -tip 0/4] ipc/shm: moar updates for v4.11 Davidlohr Bueso
2017-02-09 20:52 ` Davidlohr Bueso [this message]
2017-02-10  2:15   ` [PATCH 1/4] ipc/shm: do not check for MAP_POPULATE Hugh Dickins
2017-02-13 18:14     ` Davidlohr Bueso
2017-02-09 20:53 ` [PATCH 2/4] ipc/shm: some shmat cleanups Davidlohr Bueso
2017-02-09 20:53 ` [PATCH 3/4] sysv,ipc: cacheline align kern_ipc_perm Davidlohr Bueso
2017-02-09 20:53 ` [PATCH 4/4] mm,hugetlb: compute page_size_log properly Davidlohr Bueso
2017-02-09 20:53   ` Davidlohr Bueso
2017-02-10 10:20   ` Michal Hocko
2017-02-10 10:20     ` Michal Hocko
2017-02-10 16:51     ` Davidlohr Bueso
2017-02-10 16:51       ` Davidlohr Bueso
2017-02-20 16:11       ` Michal Hocko
2017-02-20 16:11         ` Michal Hocko
2017-02-22 16:03         ` Davidlohr Bueso
2017-02-22 16:03           ` Davidlohr Bueso
2017-02-22 16:11           ` Michal Hocko
2017-02-22 16:11             ` Michal Hocko

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