From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Jason Wang <jasowang@redhat.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
"K. Y. Srinivasan" <kys@microsoft.com>
Subject: [ 12/38] drivers: hv: switch to use mb() instead of smp_mb()
Date: Thu, 18 Jul 2013 22:21:28 -0700 [thread overview]
Message-ID: <20130719052048.721065400@linuxfoundation.org> (raw)
In-Reply-To: <20130719052047.858393825@linuxfoundation.org>
3.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jason Wang <jasowang@redhat.com>
commit 35848f68b07df3f917cb13fc3c134718669f569b upstream.
Even if guest were compiled without SMP support, it could not assume that host
wasn't. So switch to use mb() instead of smp_mb() to force memory barriers for
UP guest.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/hv/ring_buffer.c | 10 +++++-----
drivers/hv/vmbus_drv.c | 2 +-
2 files changed, 6 insertions(+), 6 deletions(-)
--- a/drivers/hv/ring_buffer.c
+++ b/drivers/hv/ring_buffer.c
@@ -32,7 +32,7 @@
void hv_begin_read(struct hv_ring_buffer_info *rbi)
{
rbi->ring_buffer->interrupt_mask = 1;
- smp_mb();
+ mb();
}
u32 hv_end_read(struct hv_ring_buffer_info *rbi)
@@ -41,7 +41,7 @@ u32 hv_end_read(struct hv_ring_buffer_in
u32 write;
rbi->ring_buffer->interrupt_mask = 0;
- smp_mb();
+ mb();
/*
* Now check to see if the ring buffer is still empty.
@@ -71,7 +71,7 @@ u32 hv_end_read(struct hv_ring_buffer_in
static bool hv_need_to_signal(u32 old_write, struct hv_ring_buffer_info *rbi)
{
- smp_mb();
+ mb();
if (rbi->ring_buffer->interrupt_mask)
return false;
@@ -442,7 +442,7 @@ int hv_ringbuffer_write(struct hv_ring_b
sizeof(u64));
/* Issue a full memory barrier before updating the write index */
- smp_mb();
+ mb();
/* Now, update the write location */
hv_set_next_write_location(outring_info, next_write_location);
@@ -549,7 +549,7 @@ int hv_ringbuffer_read(struct hv_ring_bu
/* Make sure all reads are done before we update the read index since */
/* the writer may start writing to the read area once the read index */
/*is updated */
- smp_mb();
+ mb();
/* Update the read index */
hv_set_next_read_location(inring_info, next_read_location);
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -434,7 +434,7 @@ static void vmbus_on_msg_dpc(unsigned lo
* will not deliver any more messages since there is
* no empty slot
*/
- smp_mb();
+ mb();
if (msg->header.message_flags.msg_pending) {
/*
next prev parent reply other threads:[~2013-07-19 5:21 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-19 5:21 [ 00/38] 3.9.11-stable review Greg Kroah-Hartman
2013-07-19 5:21 ` [ 01/38] CIFS use sensible file nlink values if unprovided Greg Kroah-Hartman
2013-07-19 5:21 ` [ 02/38] CIFS: Fix a deadlock when a file is reopened Greg Kroah-Hartman
2013-07-19 5:21 ` [ 03/38] rtlwifi: rtl8723ae: Fix typo in firmware names Greg Kroah-Hartman
2013-07-19 5:21 ` [ 04/38] rtlwifi: rtl8192cu: Fix duplicate if test Greg Kroah-Hartman
2013-07-19 5:21 ` [ 05/38] jbd2: move superblock checksum calculation to jbd2_write_superblock() Greg Kroah-Hartman
2013-07-19 5:21 ` [ 06/38] jbd2: fix theoretical race in jbd2__journal_restart Greg Kroah-Hartman
2013-07-19 5:21 ` [ 07/38] ext4: fix corruption when online resizing a fs with 1K block size Greg Kroah-Hartman
2013-07-19 5:21 ` [ 08/38] ext3,ext4: dont mess with dir_file->f_pos in htree_dirblock_to_tree() Greg Kroah-Hartman
2013-07-19 5:21 ` [ 09/38] usb: gadget: f_mass_storage: add missing memory barrier for thread_wakeup_needed Greg Kroah-Hartman
2013-07-19 5:21 ` [ 10/38] xhci: check for failed dma pool allocation Greg Kroah-Hartman
2013-07-19 5:21 ` [ 11/38] usb: host: xhci-plat: release mem region while removing module Greg Kroah-Hartman
2013-07-19 5:21 ` Greg Kroah-Hartman [this message]
2013-07-19 5:21 ` [ 13/38] pcmcia: at91_cf: fix gpio_get_value in at91_cf_get_status Greg Kroah-Hartman
2013-07-19 5:21 ` [ 14/38] cgroup: fix umount vs cgroup_event_remove() race Greg Kroah-Hartman
2013-07-19 5:21 ` [ 15/38] xen/time: remove blocked time accounting from xen "clockchip" Greg Kroah-Hartman
2013-07-19 5:21 ` [ 16/38] xen/pcifront: Deal with toolstack missing XenbusStateClosing state Greg Kroah-Hartman
2013-07-19 5:21 ` [ 17/38] genirq: Fix can_request_irq() for IRQs without an action Greg Kroah-Hartman
2013-07-19 5:21 ` [ 18/38] drivers/rtc/rtc-rv3029c2.c: fix disabling AIE irq Greg Kroah-Hartman
2013-07-19 5:21 ` [ 19/38] ACPI / EC: Add HP Folio 13 to ec_dmi_table in order to skip DSDT scan Greg Kroah-Hartman
2013-07-19 5:21 ` [ 20/38] ACPICA: Do not use extended sleep registers unless HW-reduced bit is set Greg Kroah-Hartman
2013-07-19 5:21 ` [ 21/38] ACPI / PM: Fix corner case in acpi_bus_update_power() Greg Kroah-Hartman
2013-07-19 5:21 ` [ 22/38] ocfs2: xattr: fix inlined xattr reflink Greg Kroah-Hartman
2013-07-19 5:21 ` [ 23/38] nbd: correct disconnect behavior Greg Kroah-Hartman
2013-07-19 5:21 ` [ 24/38] PCI: Finish SR-IOV VF setup before adding the device Greg Kroah-Hartman
2013-07-19 5:21 ` [ 25/38] PCI: Fix refcount issue in pci_create_root_bus() error recovery path Greg Kroah-Hartman
2013-07-19 5:21 ` [ 26/38] ahci: remove pmp link online check in FBS EH Greg Kroah-Hartman
2013-07-19 5:21 ` [ 27/38] timer: Fix jiffies wrap behavior of round_jiffies_common() Greg Kroah-Hartman
2013-07-19 5:21 ` [ 28/38] Btrfs: fix estale with btrfs send Greg Kroah-Hartman
2013-07-19 5:21 ` [ 29/38] Btrfs: only do the tree_mod_log_free_eb if this is our last ref Greg Kroah-Hartman
2013-07-19 5:21 ` [ 30/38] ext4: fix data offset overflow on 32-bit archs in ext4_inline_data_fiemap() Greg Kroah-Hartman
2013-07-19 5:21 ` [ 31/38] ext4: fix overflows in SEEK_HOLE, SEEK_DATA implementations Greg Kroah-Hartman
2013-07-19 5:21 ` [ 32/38] ext4: fix data offset overflow in ext4_xattr_fiemap() on 32-bit archs Greg Kroah-Hartman
2013-07-19 5:21 ` [ 33/38] ext4: fix overflow when counting used blocks on 32-bit architectures Greg Kroah-Hartman
2013-07-19 5:21 ` [ 34/38] ext4: dont allow ext4_free_blocks() to fail due to ENOMEM Greg Kroah-Hartman
2013-07-19 5:21 ` [ 35/38] drivers/dma/pl330.c: fix locking in pl330_free_chan_resources() Greg Kroah-Hartman
2013-07-19 5:21 ` [ 36/38] memcg, kmem: fix reference count handling on the error path Greg Kroah-Hartman
2013-07-19 5:21 ` [ 37/38] mm/memory-hotplug: fix lowmem count overflow when offline pages Greg Kroah-Hartman
2013-07-19 5:21 ` [ 38/38] Handle big endianness in NTLM (ntlmv2) authentication Greg Kroah-Hartman
2013-07-19 16:45 ` [ 00/38] 3.9.11-stable review Shuah Khan
2013-07-19 19:25 ` Greg Kroah-Hartman
2013-07-19 23:47 ` Greg Kroah-Hartman
2013-07-20 0:10 ` Shuah Khan
2013-07-20 16:34 ` Shuah Khan
2013-07-20 16:50 ` Greg Kroah-Hartman
2013-07-21 0:37 ` Satoru Takeuchi
2013-07-21 1:34 ` Greg Kroah-Hartman
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