linux-kernel - [PATCH 2/4] pmem: Add support for getgeo()

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Message-Id: <1409173922-7484-3-git-send-email-ross.zwisler@linux.intel.com>
Date:	Wed, 27 Aug 2014 15:12:00 -0600
From:	Ross Zwisler <ross.zwisler@...ux.intel.com>
To:	Jens Axboe <axboe@...nel.dk>,
	Matthew Wilcox <matthew.r.wilcox@...el.com>,
	Boaz Harrosh <boaz@...xistor.com>,
	Nick Piggin <npiggin@...nel.dk>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-nvdimm@...ts.01.org
Cc:	Ross Zwisler <ross.zwisler@...ux.intel.com>
Subject: [PATCH 2/4] pmem: Add support for getgeo()

Some programs require HDIO_GETGEO work, which requires we implement
getgeo.  Based off of the work done to the NVMe driver in this commit:

commit 4cc09e2dc4cb ("NVMe: Add getgeo to block ops")

Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>
---
 drivers/block/pmem.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/block/pmem.c b/drivers/block/pmem.c
index d366b9b..60bbe0d 100644
--- a/drivers/block/pmem.c
+++ b/drivers/block/pmem.c
@@ -50,6 +50,15 @@ struct pmem_device {
 	size_t			size;
 };
 
+static int pmem_getgeo(struct block_device *bd, struct hd_geometry *geo)
+{
+	/* some standard values */
+	geo->heads = 1 << 6;
+	geo->sectors = 1 << 5;
+	geo->cylinders = get_capacity(bd->bd_disk) >> 11;
+	return 0;
+}
+
 /*
  * direct translation from (pmem,sector) => void*
  * We do not require that sector be page aligned.
@@ -176,6 +185,7 @@ out:
 
 static const struct block_device_operations pmem_fops = {
 	.owner =		THIS_MODULE,
+	.getgeo =		pmem_getgeo,
 };
 
 /* Kernel module stuff */
-- 
1.9.3

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