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Message-Id: <1710930584-31180-8-git-send-email-ssengar@linux.microsoft.com>
Date: Wed, 20 Mar 2024 03:29:44 -0700
From: Saurabh Sengar <ssengar@...ux.microsoft.com>
To: kys@...rosoft.com,
haiyangz@...rosoft.com,
wei.liu@...nel.org,
decui@...rosoft.com,
gregkh@...uxfoundation.org,
linux-kernel@...r.kernel.org,
linux-hyperv@...r.kernel.org
Cc: longli@...rosoft.com,
ssengar@...rosoft.com
Subject: [PATCH v2 7/7] uio_hv_generic: Remove use of PAGE_SIZE
Remove use of PAGE_SIZE for device ring buffer size calculation, as
there is no dependency on device ring buffer size for linux kernel's
PAGE_SIZE. Use the absolute value of 2 MB instead.
Signed-off-by: Saurabh Sengar <ssengar@...ux.microsoft.com>
Reviewed-by: Long Li <longli@...rosoft.com>
---
drivers/uio/uio_hv_generic.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c
index 289611c7dfd7..015ddbddd6e1 100644
--- a/drivers/uio/uio_hv_generic.c
+++ b/drivers/uio/uio_hv_generic.c
@@ -36,7 +36,6 @@
#define DRIVER_AUTHOR "Stephen Hemminger <sthemmin at microsoft.com>"
#define DRIVER_DESC "Generic UIO driver for VMBus devices"
-#define HV_RING_SIZE 512 /* pages */
#define SEND_BUFFER_SIZE (16 * 1024 * 1024)
#define RECV_BUFFER_SIZE (31 * 1024 * 1024)
@@ -146,7 +145,7 @@ static const struct bin_attribute ring_buffer_bin_attr = {
.name = "ring",
.mode = 0600,
},
- .size = 2 * HV_RING_SIZE * PAGE_SIZE,
+ .size = 2 * SZ_2M,
.mmap = hv_uio_ring_mmap,
};
@@ -156,7 +155,7 @@ hv_uio_new_channel(struct vmbus_channel *new_sc)
{
struct hv_device *hv_dev = new_sc->primary_channel->device_obj;
struct device *device = &hv_dev->device;
- const size_t ring_bytes = HV_RING_SIZE * PAGE_SIZE;
+ const size_t ring_bytes = SZ_2M;
int ret;
/* Create host communication ring */
@@ -244,7 +243,7 @@ hv_uio_probe(struct hv_device *dev,
size_t ring_size = hv_dev_ring_size(channel);
if (!ring_size)
- ring_size = HV_RING_SIZE * PAGE_SIZE;
+ ring_size = SZ_2M;
pdata = devm_kzalloc(&dev->device, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
--
2.34.1
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