From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: stable-review@kernel.org, torvalds@linux-foundation.org,
akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk,
Hugh Dickins <hughd@google.com>
Subject: [02/23] shmem: let shared anonymous be nonlinear again
Date: Fri, 25 Mar 2011 16:55:39 -0700 [thread overview]
Message-ID: <20110325235636.672054980@clark.kroah.org> (raw)
In-Reply-To: <20110325235654.GA24416@kroah.com>
[-- Attachment #1: shmem-let-shared-anonymous-be-nonlinear-again.patch --]
[-- Type: text/plain, Size: 1008 bytes --]
From: Hugh Dickins <hughd@google.com>
commit bee4c36a5cf5c9f63ce1d7372aa62045fbd16d47 upstream.
Up to 2.6.22, you could use remap_file_pages(2) on a tmpfs file or a
shared mapping of /dev/zero or a shared anonymous mapping. In 2.6.23 we
disabled it by default, but set VM_CAN_NONLINEAR to enable it on safe
mappings. We made sure to set it in shmem_mmap() for tmpfs files, but
missed it in shmem_zero_setup() for the others. Fix that at last.
Reported-by: Kenny Simpson <theonetruekenny@yahoo.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
mm/shmem.c | 1 +
1 file changed, 1 insertion(+)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2691,5 +2691,6 @@ int shmem_zero_setup(struct vm_area_stru
fput(vma->vm_file);
vma->vm_file = file;
vma->vm_ops = &shmem_vm_ops;
+ vma->vm_flags |= VM_CAN_NONLINEAR;
return 0;
}
next prev parent reply other threads:[~2011-03-25 23:58 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20110325235537.660072281@clark.kroah.org>
2011-03-25 23:56 ` [00/23] 2.6.32.36-longterm review Greg KH
2011-03-25 23:55 ` [01/23] aio: wake all waiters when destroying ctx Greg KH
2011-03-25 23:55 ` Greg KH [this message]
2011-03-25 23:55 ` [03/23] PCI hotplug: acpiphp: set current_state to D0 in register_slot Greg KH
2011-03-25 23:55 ` [04/23] xen: set max_pfn_mapped to the last pfn mapped Greg KH
2011-03-25 23:55 ` [05/23] x86: Cleanup highmap after brk is concluded Greg KH
2011-03-25 23:55 ` [06/23] PCI: return correct value when writing to the "reset" attribute Greg KH
2011-03-25 23:55 ` [07/23] Prevent rt_sigqueueinfo and rt_tgsigqueueinfo from spoofing the signal code Greg KH
2011-03-25 23:55 ` [08/23] ext3: skip orphan cleanup on rocompat fs Greg KH
2011-03-25 23:55 ` [09/23] procfs: fix /proc/<pid>/maps heap check Greg KH
2011-03-25 23:55 ` [10/23] proc: protect mm start_code/end_code in /proc/pid/stat Greg KH
2011-03-25 23:55 ` [11/23] fbcon: Bugfix soft cursor detection in Tile Blitting Greg KH
2011-03-25 23:55 ` [12/23] nfsd41: modify the members value of nfsd4_op_flags Greg KH
2011-03-25 23:55 ` [13/23] nfsd: wrong index used in inner loop Greg KH
2011-03-25 23:55 ` [14/23] [media] uvcvideo: Fix uvc_fixup_video_ctrl() format search Greg KH
2011-03-25 23:55 ` [15/23] ehci-hcd: Bug fix: dont set a QHs Halt bit Greg KH
2011-03-25 23:55 ` [16/23] USB: uss720 fixup refcount position Greg KH
2011-03-25 23:55 ` [17/23] USB: cdc-acm: fix memory corruption / panic Greg KH
2011-03-25 23:55 ` [18/23] USB: cdc-acm: fix potential null-pointer dereference Greg KH
2011-03-25 23:55 ` [19/23] USB: cdc-acm: fix potential null-pointer dereference on disconnect Greg KH
2011-03-25 23:55 ` [20/23] Input: xen-kbdfront - advertise either absolute or relative coordinates Greg KH
2011-03-25 23:55 ` [21/23] SUNRPC: Never reuse the socket port after an xs_close() Greg KH
2011-03-25 23:55 ` [22/23] fs: call security_d_instantiate in d_obtain_alias V2 Greg KH
2011-03-25 23:56 ` [23/23] dcdbas: force SMI to happen when expected Greg KH
2011-03-26 0:50 ` [00/23] 2.6.32.36-longterm review Teck Choon Giam
2011-03-26 4:51 ` Greg KH
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