From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
Alessio Balsini <balsini@android.com>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.4 12/41] loop: Add LOOP_SET_DIRECT_IO to compat ioctl
Date: Sun, 27 Oct 2019 22:00:50 +0100 [thread overview]
Message-ID: <20191027203110.371349330@linuxfoundation.org> (raw)
In-Reply-To: <20191027203056.220821342@linuxfoundation.org>
From: Alessio Balsini <balsini@android.com>
[ Upstream commit fdbe4eeeb1aac219b14f10c0ed31ae5d1123e9b8 ]
Enabling Direct I/O with loop devices helps reducing memory usage by
avoiding double caching. 32 bit applications running on 64 bits systems
are currently not able to request direct I/O because is missing from the
lo_compat_ioctl.
This patch fixes the compatibility issue mentioned above by exporting
LOOP_SET_DIRECT_IO as additional lo_compat_ioctl() entry.
The input argument for this ioctl is a single long converted to a 1-bit
boolean, so compatibility is preserved.
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Alessio Balsini <balsini@android.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/block/loop.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1557,6 +1557,7 @@ static int lo_compat_ioctl(struct block_
arg = (unsigned long) compat_ptr(arg);
case LOOP_SET_FD:
case LOOP_CHANGE_FD:
+ case LOOP_SET_DIRECT_IO:
err = lo_ioctl(bdev, mode, cmd, arg);
break;
default:
next prev parent reply other threads:[~2019-10-27 21:38 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-27 21:00 [PATCH 4.4 00/41] 4.4.198-stable review Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 01/41] scsi: ufs: skip shutdown if hba is not powered Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 02/41] scsi: megaraid: disable device when probe failed after enabled device Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 03/41] scsi: qla2xxx: Fix unbound sleep in fcport delete path Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 04/41] ARM: OMAP2+: Fix missing reset done flag for am3 and am43 Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 05/41] ARM: dts: am4372: Set memory bandwidth limit for DISPC Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 06/41] nl80211: fix null pointer dereference Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 07/41] mips: Loongson: Fix the link time qualifier of serial_exit() Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 08/41] net: hisilicon: Fix usage of uninitialized variable in function mdio_sc_cfg_reg_write() Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 09/41] namespace: fix namespace.pl script to support relative paths Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 10/41] MIPS: Treat Loongson Extensions as ASEs Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 11/41] MIPS: elf_hwcap: Export userspace ASEs Greg Kroah-Hartman
2019-10-27 21:00 ` Greg Kroah-Hartman [this message]
2019-10-27 21:00 ` [PATCH 4.4 13/41] net: bcmgenet: Fix RGMII_MODE_EN value for GENET v1/2/3 Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 14/41] net: bcmgenet: Set phydev->dev_flags only for internal PHYs Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 15/41] sctp: change sctp_prot .no_autobind with true Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 16/41] net: avoid potential infinite loop in tc_ctl_action() Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 17/41] ipv4: Return -ENETUNREACH if we cant create route but saddr is valid Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 18/41] memfd: Fix locking when tagging pins Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 19/41] USB: legousbtower: fix memleak on disconnect Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 20/41] usb: udc: lpc32xx: fix bad bit shift operation Greg Kroah-Hartman
2019-10-27 21:00 ` [PATCH 4.4 21/41] USB: serial: ti_usb_3410_5052: fix port-close races Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 22/41] USB: ldusb: fix memleak on disconnect Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 23/41] USB: usblp: fix use-after-free " Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 24/41] USB: ldusb: fix read info leaks Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 25/41] scsi: core: try to get module before removing device Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 26/41] ASoC: rsnd: Reinitialize bit clock inversion flag for every format setting Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 27/41] cfg80211: wext: avoid copying malformed SSIDs Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 28/41] mac80211: Reject malformed SSID elements Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 29/41] drm/edid: Add 6 bpc quirk for SDC panel in Lenovo G50 Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 30/41] scsi: zfcp: fix reaction on bit error threshold notification Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 31/41] mm/slub: fix a deadlock in show_slab_objects() Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 32/41] xtensa: drop EXPORT_SYMBOL for outs*/ins* Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 33/41] parisc: Fix vmap memory leak in ioremap()/iounmap() Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 34/41] CIFS: avoid using MID 0xFFFF Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 35/41] btrfs: block-group: Fix a memory leak due to missing btrfs_put_block_group() Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 36/41] memstick: jmb38x_ms: Fix an error handling path in jmb38x_ms_probe() Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 37/41] cpufreq: Avoid cpufreq_suspend() deadlock on system shutdown Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 38/41] xen/netback: fix error path of xenvif_connect_data() Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 39/41] PCI: PM: Fix pci_power_up() Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 40/41] net: sched: Fix memory exposure from short TCA_U32_SEL Greg Kroah-Hartman
2019-10-27 21:01 ` [PATCH 4.4 41/41] RDMA/cxgb4: Do not dma memory off of the stack Greg Kroah-Hartman
2019-10-28 3:55 ` [PATCH 4.4 00/41] 4.4.198-stable review kernelci.org bot
2019-10-28 9:07 ` Didik Setiawan
2019-10-28 13:32 ` Guenter Roeck
2019-10-28 13:49 ` Greg Kroah-Hartman
2019-10-28 13:57 ` Greg Kroah-Hartman
2019-10-28 18:12 ` Guenter Roeck
2019-10-29 8:19 ` Greg Kroah-Hartman
2019-10-28 13:33 ` Guenter Roeck
2019-10-28 21:36 ` Jon Hunter
2019-10-29 13:29 ` Naresh Kamboju
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