[PATCH 1/4] ipc/shm: do not check for MAP_POPULATE

From	Davidlohr Bueso <dave@stgolabs.net>
Newsgroups	linux.kernel
Subject	[PATCH 1/4] ipc/shm: do not check for MAP_POPULATE
Date	2017-02-09 22:00 +0100
Message-ID	<t93YS-2u7-23@gated-at.bofh.it> (permalink)
References	<t93YS-2u7-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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

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[PATCH 1/4] ipc/shm: do not check for MAP_POPULATE Davidlohr Bueso <dave@stgolabs.net> - 2017-02-09 22:00 +0100
  Re: [PATCH 1/4] ipc/shm: do not check for MAP_POPULATE Hugh Dickins <hughd@google.com> - 2017-02-10 03:30 +0100
    Re: [PATCH 1/4] ipc/shm: do not check for MAP_POPULATE Davidlohr Bueso <dave@stgolabs.net> - 2017-02-13 19:20 +0100

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