[PATCH 09/46] Staging: hv: storvsc: Get rid of final_release_stor_device() by inlining code
From: "K. Y. Srinivasan" <kys@microsoft.com>
Date: 2011-08-27 18:12:51
Also in:
lkml
Subsystem:
staging subsystem, the rest · Maintainers:
Greg Kroah-Hartman, Linus Torvalds
Get rid of final_release_stor_device() by inlining code. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> --- drivers/staging/hv/storvsc.c | 23 ++++++----------------- 1 files changed, 6 insertions(+), 17 deletions(-)
diff --git a/drivers/staging/hv/storvsc.c b/drivers/staging/hv/storvsc.c
index 1976a34..3e9829f 100644
--- a/drivers/staging/hv/storvsc.c
+++ b/drivers/staging/hv/storvsc.c@@ -67,22 +67,6 @@ static inline struct storvsc_device *get_in_stor_device( return stor_device; } -/* Drop ref count to 0. No one can use stor_device object. */ -static inline struct storvsc_device *final_release_stor_device( - struct hv_device *device) -{ - struct storvsc_device *stor_device; - - stor_device = (struct storvsc_device *)device->ext; - - /* Busy wait until the ref drop to 1, then set it to 0 */ - while (atomic_cmpxchg(&stor_device->ref_count, 1, 0) != 1) - udelay(100); - - device->ext = NULL; - return stor_device; -} - static int storvsc_channel_init(struct hv_device *device) { struct storvsc_device *stor_device;
@@ -401,7 +385,12 @@ int storvsc_dev_remove(struct hv_device *device) storvsc_wait_to_drain(stor_device); - stor_device = final_release_stor_device(device); + /* + * Since we have already drained, we don't need to busy wait + * as was done in final_release_stor_device() + */ + atomic_set(&stor_device->ref_count, 0); + device->ext = NULL; /* Close the channel */ vmbus_close(device->channel);
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1.7.4.1